Document III · Aotearoa New Zealand · 2026

LAYER ZERO

Prerequisite Technologies
Every production method depends on inputs. This document traces those inputs back to what the land and the community can provide — and shows how to produce them from first principles. Hemp. Yeast. Methanol from wood. Lye from ash. Paper from fibre. Stone into lime. Ore into iron. Tree into timber. Earth into shelter.
This is the third document in the series. Foundations asks the question. The Practical Guide answers it at the production level. Layer Zero answers the deeper question: where does the production itself come from? Read alongside The Practical Guide — each section here feeds directly into the systems described there.
I
The Dependency Map
Where each process still reaches outside the community — and how to close every loop
Complete input dependency map — what each system needs and what replaces it
Read first
A system is only as independent as its least replaceable input. Map the dependencies before building anything — then work backward from the most critical ones.
ProcessCurrent external inputVillage replacement
BiodieselMethanol (petrochemical)NaOH lye (industrial)→ Wood-distilled methanol (Sec V)→ Wood ash lye (Sec IV)
No-dig bedsManufactured cardboardCommercial compost→ Hugelkultur — no cardboard needed (Sec VII)→ Worm cast + on-site composting
Bread and fermentsCommercial yeast→ Wild-captured sourdough culture (Sec III)
Paper and recordsManufactured paper→ Hemp, harakeke, or recycled paper (Sec VIII)
Rope and cordageNylon, polypropylene rope→ Hemp fibre, harakeke twine (Sec II, IX)
Building insulation and structureManufactured cement, foam, insulation batts→ Hempcrete, cob, lime, straw bale (Sec II, X, XV)
Animal feedCommercial pellets, grain→ Hemp seed cake, comfrey, fodder beet, black soldier fly
Soil fertilityPurchased lime, superphosphate, NPK→ Biochar, wood ash, bone char, compost tea (Sec VI)
Textiles and clothingIndustrial fabric→ Hemp, wool, harakeke woven fibre (Sec IX)
ToolsPurchased manufactured tools→ Blacksmithing, tool repair and making (Sec XIII, XIV)
Timber and structural materialPurchased milled timber→ Community forestry, hand and chainsaw milling (Sec XI)
Metal stock (iron, steel)Industrial steel→ Scrap reclamation + bloomery iron from ore (long term) (Sec XII)
Lime and mortarPurchased hydrated lime, cement→ Kiln-burnt limestone — NZ deposits accessible (Sec X)
Fired ceramics and vesselsManufactured containers→ Clay sourcing and pit/kiln firing (Sec X)
LightingGrid electricity or commercial candles→ Tallow/beeswax candles, fat lamps, solar LED
Fire startingCommercial lighters and matches→ Flint and steel, bow drill, fire piston — know at least one
Medicinal alcohol / disinfectantPurchased isopropyl alcohol, tinctures, pharmaceuticals→ Distillation of fermented wash (Sec XVI) — produces medicinal spirit, disinfectant, and tincture base
Essential oilsPurchased essential oils→ Steam distillation of NZ native plants — mānuka, kānuka, kawakawa (Sec XVI)
Diesel fuel (supplementary)Purchased diesel→ Plastic pyrolysis oil (Sec XVII) · Biodiesel from WVO (Practical Guide Sec IV)
Purified water (high grade)Purchased bottled water, filter cartridges→ Distillation at 100°C removes everything — biological, chemical, heavy metals (Sec XVI)
The layering principle
The goal is not to replace every input immediately — it is to know the replacement for everything, and to have practised it before you need it under pressure. The community that has made methanol from wood even once understands the process in its body, not just its mind. That understanding is the real resilience.
· · ·
II
Hemp — The Spine Plant
Cannabis sativa L. — one crop, a dozen critical outputs
Why hemp sits at the centre of a self-sufficient community
Foundation
"Hemp is not a single crop. It is a complete materials platform — fibre, food, medicine, fuel, building material, paper, and soil amendment in a single annual plant that grows on marginal land with minimal inputs and improves the soil it grows in."
Hempcrete
Hemp hurd (the woody core) mixed with lime binder produces a lightweight, breathable, insulating building material. Load-bearing with timber frame. Carbon-negative — stores CO2 permanently.
Hemp paper
One hectare of hemp produces 4x the paper pulp of one hectare of trees, harvested annually. No sulphur processing required. More durable than wood-pulp paper — hemp paper lasts centuries.
Hemp rope and cordage
Bast fibre from the outer stalk. Stronger than cotton. Naturally resistant to UV and salt water. All rope, twine, netting, and sail cloth needs covered from one crop.
Hemp textiles
Retted and hackled bast fibre spun into yarn, woven into fabric. Durable, breathable, antimicrobial. Can be blended with wool for warmth.
Hemp seed oil
Cold-pressed from seeds — edible cooking oil and biodiesel feedstock. Excellent omega-3/omega-6 ratio. Press cake remaining after pressing is high-protein animal feed.
Hemp seed food
Complete protein — all essential amino acids present. 30–35% protein by weight. Can be eaten whole, ground into flour, pressed for milk, or fermented. An exceptional nutrition crop.
Hemp fibre composites
Hemp fibre in resin matrix replaces fibreglass. Lightweight, strong, biodegradable at end of life. Can produce panels, panels for vehicles, structural sheets, and containers.
Hemp as soil crop
Deep taproot breaks up compacted soil. Uptakes heavy metals (phytoremediation) — useful on contaminated land before food production. Suppresses weeds without herbicides. Fixes soil structure in one season.
Biomass and biogas
Hemp's high cellulose content makes it an excellent biogas feedstock. Whole-plant biomass can also be used as a high-BTU solid fuel — better burn quality than most wood species per kilogram.
Growing hemp in Aotearoa NZ — licensing, cultivation, and processing
Skill 2NZ Specific
NZ legal situation
Industrial hemp (Cannabis sativa with THC below 0.35%) is legal to grow in NZ under a licence from the Ministry of Health. The licensing process is accessible — it requires a background check, a site plan, and an agreed crop testing regime. Hemp for fibre, seed, and construction material is the licensed purpose. Community cooperatives can hold a joint licence. Contact the Ministry of Health's medicinal cannabis and hemp team for current application guidance.
Cultivation — Waikato conditions
  1. Variety selection: choose varieties registered for NZ production. Fibre varieties (Futura 75, Fedora 17) produce long bast fibre and have low THC. Seed varieties (Finola) are shorter with higher seed yield. Dual-purpose varieties exist for communities wanting both fibre and food.
  2. Soil preparation: hemp prefers well-drained, slightly alkaline (pH 6.5–7.5), fertile soil. The Waikato's allophanic soils suit it well with lime correction if needed. Deep tillage once before planting breaks up any compaction — after that, hemp's own taproot does the work.
  3. Sow after last frost risk — in the Waikato, late October. Direct sow 2.5cm deep at 25–35kg seed per hectare for fibre crops (dense planting produces tall, less-branched plants with longer fibre). For seed crops, reduce density to 10–15kg/ha to encourage branching and seed production.
  4. Hemp establishes quickly and shades out weeds within 3–4 weeks of emergence. No herbicide is required once established. It is effectively self-weeding.
  5. Water requirement: 300–500mm during the growing season. The Waikato typically provides this through rainfall. Supplemental irrigation is rarely needed except in dry summers.
  6. No pesticides required: hemp has very few serious pest pressures in NZ. It is one of the most pest-resistant crops in temperate climates.
  7. Harvest for fibre: when male plants shed pollen and begin to die (approximately 70–90 days). Cut with a sickle bar or scythe for small scale, or hire a forage harvester for larger areas.
  8. Harvest for seed: when seed heads are mature and beginning to drop (approximately 110–130 days). Thresh to separate seed.
Retting — releasing the fibre
  1. Dew retting (simplest): lay cut stalks in swaths on the field. Morning dew and rainfall encourage microbial action that separates the outer bast fibre from the woody core (hurd) over 4–6 weeks. Turn the swaths weekly for even retting. Retting is complete when the fibre separates easily by hand without tearing.
  2. Water retting (faster, better fibre): submerge bundles of stalks in a pond or slow stream for 7–14 days. The anaerobic microbial environment is more consistent than dew retting and produces higher-quality, more uniform fibre. Note: the process produces strong-smelling, oxygen-depleting water — do not use in waterways with fish. Use a dedicated retting pond.
  3. Breaking and scutching: once retted and dried, pass stalks through a hemp brake (a hinged wooden flail device) to break the woody hurd into pieces. Then scutch — beat with a wooden paddle to remove the broken hurd, leaving clean bast fibre bundles.
  4. Hackling: draw fibre through a board of metal spikes (a hackle) to align fibres and remove short pieces. The long, aligned fibre (line fibre) is ready for spinning into yarn. The short tangled fibre (tow) is excellent for insulation, paper, or hempcrete.
Hempcrete — basic preparation
  1. Prepare hemp hurd (the woody core remaining after fibre extraction) — dried to below 20% moisture content. The hurd is the aggregate in hempcrete.
  2. Mix by volume: 3 parts hemp hurd : 2 parts hydraulic lime binder : 1.5 parts water. Mix dry components first, add water gradually to a crumbly, slightly damp consistency — not wet. It should just hold shape when squeezed.
  3. Pack into temporary timber formwork around a structural timber or pole frame — hemp cannot be used as a load-bearing material by itself. Pack firmly in 15cm lifts, removing formwork and allowing each lift to begin setting before adding the next.
  4. Cure slowly: protect from direct sun and rain for minimum 4 weeks. Hempcrete takes 3–6 months to reach full strength. Do not rush or seal the surface — it must breathe to cure. Final wall is lightweight, insulating, vapour-permeable, and carbon-storing.
Watch points
  • Hemp licence conditions require crop testing at specified stages — non-compliance can result in licence cancellation and crop destruction. Know your conditions and comply.
  • Hempcrete is not waterproof — it must always be protected by overhanging eaves and a lime render or plaster coat on external surfaces. Exposed hempcrete erodes.
  • Water-retted hemp creates oxygen-depleted, anaerobic water that will kill fish and aquatic life if it enters waterways. Manage retting ponds responsibly.
· · ·
III
Yeast — Capture, Culture, and Propagation
The invisible prerequisite for bread, alcohol, fermentation, and biodiesel feedstock
Wild yeast capture — sourdough starter from scratch
Skill 1$ Free

Wild yeast (Saccharomyces cerevisiae and relatives) exists on the surface of every grain, fruit, and flower in your environment. Flour and water is the capture medium. What you are building is a stable, locally-adapted culture that will produce bread, alcohol, and fermented products indefinitely with zero external input.

Capture steps
  1. Mix equal weights of wholegrain flour (rye flour is most reliable — it carries more wild yeast than white flour) and unchlorinated water. Tap water in many NZ areas contains chlorine or chloramine — let it sit uncovered for an hour or use collected rainwater. Mix to a thick paste in a glass jar.
  2. Cover with cloth and leave at room temperature (18–24°C ideal). In the Waikato, most of the year this is achievable without heating.
  3. After 24 hours, discard half the mixture and add equal weights of fresh flour and water. Repeat every 24 hours. You are feeding the wild organisms that colonise the mixture.
  4. By day 3–5 you should see bubbling and smell a sharp, sour-yeasty odour. If you see pink, orange, or black mould growing (not just surface dryness) — discard and start again.
  5. By day 7–10 the culture is typically stable and active enough to leaven bread. Test: drop a teaspoon into water. If it floats, the culture has sufficient gas production. If it sinks, feed and wait another day.
  6. Once stable, your culture is self-sustaining indefinitely. Feed regularly (at minimum weekly if refrigerated, daily if kept at room temperature).
Ongoing maintenance and propagation
  1. Refrigerated storage: a fed culture sealed in the fridge will remain viable for 2–3 weeks between feedings. Bring to room temperature and feed twice before using for baking.
  2. Dried backup: spread a thin layer of active starter on baking paper. Allow to dry completely at room temperature (do not use heat — it kills the yeast). Break into flakes and store sealed in a cool, dark place. Viable for 6–12 months. Rehydrate with flour and water to revive.
  3. Community distribution: once stable, divide and share your culture. Every household having their own independent culture means the loss of one does not affect others. Culture passes between generations — a well-maintained sourdough culture is genuinely an heirloom.
  4. Strain selection over time: your culture will adapt to your local environment, your flour, and your kitchen temperature. Select from batches with the best flavour, most reliable activity, and best rise. Over years, a community culture becomes something specific to your place.
Yeast for alcohol production — wash and wine cultures
Skill 2

Producing alcohol for biodiesel feedstock, medicine tinctures, cleaning, and fuel requires higher-alcohol-tolerant yeast strains than typical sourdough cultures. Wild capture works but commercial wine or distillers yeast (where available) tolerates higher alcohol concentrations before dying.

Wild fruit yeast capture
  1. Collect unwashed, ripe organic fruit — grapes, plums, feijoa, apple. The white bloom on grape skins is wild yeast. Do not wash.
  2. Crush fruit into a clean vessel. Add water (1L per kg fruit) and a small amount of sugar (optional). Cover with cloth. Fermentation should begin within 24–48 hours.
  3. Once active fermentation is established (visible bubbling), you have a live culture. This can be used directly for alcohol production or propagated on a sugar-water medium for repeated use.
  4. Propagate: take 100ml of active ferment, add to 500ml of sugar water (10% sugar by weight) in a clean jar. Feed regularly. This maintains your culture without wasting fruit.
Basic sugar wash for alcohol
  1. Dissolve sugar in warm water: 1kg sugar per 5L water gives approximately 7–8% alcohol potential. Use any fermentable sugar — raw sugar, honey, fruit, grain, potato starch (pre-converted by cooking and enzyme action).
  2. Cool to below 30°C. Add yeast culture (50–100ml of active culture per 5L). Add a pinch of nutrients if available — Vegemite contains yeast-accessible B vitamins and minerals that significantly improve fermentation health.
  3. Seal with an airlock (a small water-filled cup with a bent tube — prevents oxygen entry while allowing CO2 out). Ferment at 18–25°C for 5–10 days until bubbling stops.
  4. The resulting wash (typically 7–12% alcohol) is the feedstock for methanol distillation, medicinal tincture making, vinegar production, or direct fuel use.
NZ context: Home brewing of beer and wine for personal use is entirely legal in NZ. Distillation of spirits requires a licence. The methanol distillation described in Section V is for fuel and industrial solvent production, not for drinking — this distinction matters legally and practically (wood-distilled methanol is toxic to drink).
· · ·
IV
Lye from Wood Ash
Potassium hydroxide for soap, biodiesel, and water treatment — free from your fire
Producing potassium hydroxide (lye) from hardwood ash
Skill 2$ Free
Two types of lye: Wood ash produces potassium hydroxide (KOH — soft lye), which makes soft soap and can substitute for NaOH in biodiesel at adjusted ratios. Sodium hydroxide (NaOH — hard lye) is harder to produce at home but KOH is effective for most community applications. Both are caustic — handle with the same care as commercial NaOH.
What you need
Hardwood ash — oak, tōtara, mānuka, kānuka, beech. Softwood ash (pine, macrocarpa) produces weaker lye.
Rainwater or distilled water — not tap water. Minerals in tap water react with the lye.
Leaching vessel — wooden barrel or plastic bucket with drainage holes in the base.
Stainless steel or ceramic collection vessel — do not use aluminium (lye destroys it).
Build steps — the ash hopper
  1. Collect only clean wood ash — no ash from painted, treated, or composite wood, and no ash mixed with coal or charcoal. Store dry until you have sufficient quantity (a minimum of 10 litres of ash for a useful batch).
  2. Build a simple ash hopper: a barrel or bucket with a layer of gravel at the base, then straw or hay as a filter layer, then tightly packed ash. Drill or punch small holes in the base to allow leachate to drip out.
  3. Slowly pour rainwater over the ash — 2–3 litres to start. Do not pour quickly or you will channel through the ash rather than percolating evenly. Allow to drip through into a collection vessel below.
  4. Concentrate the lye by boiling the collected liquid in a stainless or enamelled pot. Do NOT use aluminium — lye dissolves it. Reduce volume by half to two-thirds. The more concentrated, the stronger the lye.
  5. Test lye strength — the traditional test: a fresh egg should float with a coin-sized area of shell visible above the surface. If the egg sinks, the lye is too weak — reduce further. If the egg bobs high, the lye is very strong.
  6. For soap: use lye at egg-float concentration. For biodiesel: substitute KOH for NaOH at a ratio of approximately 1.4g KOH for every 1g NaOH called for in the recipe (KOH is less caustic by weight and requires slightly more).
Handle with the same respect as commercial lye
  • Wood ash lye is genuinely caustic — it will cause chemical burns on skin and eyes. Gloves and eye protection are required during all handling.
  • Do not use aluminium vessels at any stage — the reaction produces hydrogen gas and damages the vessel
  • Concentration varies significantly between batches — always test before use in a recipe that depends on specific lye strength
· · ·
V
Methanol from Wood
Destructive distillation — closing the biodiesel supply chain
Wood distillation — producing methanol, wood tar, and charcoal simultaneously
Skill 3$$ Med
What this process produces
Heating wood in the absence of oxygen (pyrolysis / destructive distillation) produces four simultaneous outputs: methanol (wood alcohol) and other volatile condensates, wood tar (preservative, waterproofing), non-condensable gas (syn-gas, directly burnable for heat), and charcoal (biochar — Section VI). This is one of the most versatile processes available to a village-scale community.
Before starting — including the pressure requirement
  • Pressure gauge on the collection vessel — mandatory: This applies to wood distillation, alcohol distillation, and plastic pyrolysis equally. A person building this type of system was seriously burned when pressurised fuel released from the collection vessel on opening. There was no pressure gauge. Install a pressure gauge on the outlet line between the condensing coil and the collection vessel. The collection vessel itself must vent freely to atmosphere at all times — never seal it. Read the gauge before touching any fitting. If it reads above zero, stop and allow full cooling before proceeding. The gauge costs very little. Not having one cost someone his safety.
  • Wood-distilled methanol is toxic to drink — causes blindness and death. Label clearly and store separately from any consumable alcohol. Never combine with food fermentation equipment.
  • The process involves combustible gases at elevated temperatures. Work outdoors. Have fire suppression available. Ensure all fittings are tight before heating.
  • Non-condensable syn-gas (CO, H2, methane) exits the end of the coil — burn it at the exit point or vent to clear air. Never allow it to accumulate in any enclosed space.
  • Condensed wood tar is a skin irritant and probable carcinogen — handle with gloves, avoid prolonged skin contact.
What you need
Retort vessel — thick-walled steel drum or heavy pipe with sealed, fire-resistant fittings. The retort must withstand 400–500°C without warping or leaking.
Condensing coil — copper or steel pipe coiled through a water-cooled vessel. Converts vapours back to liquid. 3–5m of coiled pipe minimum.
Collection vessel — glass or stainless steel. The condensed liquid (pyroligneous acid) separates into layers.
External heat source — a dedicated fire pit or rocket stove that heats the retort from outside. The wood inside must not combust.
Separation funnel or layering vessel — to separate the methanol-rich upper layer from the heavier tar fraction.
Build steps
  1. Source hardwood for the retort charge — dry hardwood (mānuka, kānuka, beech, tōtara) produces the best methanol yield. Cut into small pieces to pack densely into the retort. Fill the retort completely — air space inside reduces yield.
  2. Seal the retort with a pipe fitting leading to the condensing coil. The only opening is this outlet pipe. Check all seals are tight — leaks cause fire risk and loss of product.
  3. Submerge the condensing coil in a vessel of cold water. As pyrolysis gases pass through the coil, they cool and condense into liquid. Keep the cooling water cold — replace or circulate it during the run.
  4. Begin heating the retort from outside. Temperature should rise slowly to 150–200°C first — initial steam and water vapour. This condensate is mostly water and can be discarded or used as wood vinegar (a mild acid useful in the garden).
  5. As temperature rises to 250–350°C, the pyrolysis condensates begin — this fraction contains methanol, acetone, acetic acid, and wood tar components. Collect separately from the initial water fraction.
  6. At 400–500°C, the wood is converting fully to charcoal. Non-condensable syn-gas (CO, H2, methane) exits the end of the coil — this can be burned directly at the exit point to supplement the heat source. Do not allow syn-gas to accumulate in enclosed spaces.
  7. Allow the retort to cool completely before opening. The charcoal inside is the biochar product (Section VI). Handle carefully — hot charcoal can re-ignite on contact with air.
  8. Allow the collected condensate to separate by gravity: a lighter, clearer upper layer (methanol-rich fraction) and a heavier, darker lower layer (wood tar, water, heavier acids). Carefully decant the upper layer.
  9. Further purify the methanol fraction by simple distillation at 64.7°C (methanol's boiling point). Collect the fraction boiling between 62–68°C. Purity improves significantly with each distillation pass. Two passes produces methanol sufficient for biodiesel production.
Yield expectation: Approximately 100kg of dry hardwood produces 3–5 litres of crude methanol, 10–15kg of charcoal, and significant wood tar. The yield is modest — this is a community-scale process. A community producing biodiesel from waste vegetable oil needs methanol in bulk; sustaining that from wood distillation requires a dedicated, regular operation with good wood supply. Build this in parallel with the biodiesel operation, not as an afterthought.
· · ·
VI
Biochar Production
The soil amendment that changes everything — and a co-product of every wood burn
Making and using biochar — from simple cone burn to retort charcoal
Skill 1–3$ Free
What biochar does
Biochar is not a fertiliser — it is a soil structure modifier. Its porous carbon matrix provides habitat for beneficial microorganisms, increases water retention by up to 40%, reduces nitrate leaching, addresses the phosphate-binding problem specific to Waikato allophanic soils, and stores carbon in the soil for hundreds to thousands of years. A single application persists and improves over time — unlike any other amendment.
Method 1 — Cone pit burn (simplest, large batches)
  1. Dig or build a cone-shaped pit 60–120cm diameter, 60cm deep. The cone shape creates a specific airflow that encourages clean combustion with minimal oxygen at the base — producing char rather than ash.
  2. Light a small fire at the base. Once burning cleanly, add woody material continuously — feed the top with new material as the bottom converts to char. Keep the top layer flaming. A thin layer of white ash on top with glowing char below is the correct state.
  3. When the pit is full of glowing char and you have sufficient material, quench with water immediately — pour water directly onto the char until steam stops rising. This captures the char at its maximum carbon state and prevents it burning to ash.
  4. Allow to cool, then collect. Wet char can be spread directly in the garden or dried for storage.
Method 2 — TLUD (Top-Lit Updraft) retort (cleaner, more controllable)
  1. Use a 200-litre drum with air inlet holes drilled around the base, and a chimney pipe fitted through the lid. Pack tightly with small, dry wood pieces.
  2. Light the top surface. Air enters from the bottom holes, rises through the packed wood, supports combustion at the top. Pyrolysis gases from lower wood are drawn upward and combust in the flame zone at the top. This is a clean, efficient process — very little smoke.
  3. When the flame front has worked most of the way down (typically 45–90 minutes), close the air inlet and chimney. The remaining heat converts the bottom material to char in a low-oxygen environment.
  4. Allow to cool fully before opening. This is the same charcoal produced as a co-product of wood distillation (Section V).
Charging biochar before soil application
  1. Fresh biochar is inert — it will initially absorb nutrients from the soil rather than adding them. Charge it first by soaking in a rich liquid: compost tea, worm leachate (diluted), urine (diluted 1:10), or a slurry of compost and water.
  2. Soak for minimum 2 weeks, stirring occasionally. The porous structure fills with microbial life and nutrients.
  3. Charged biochar can be applied to garden soil at 1–5% by volume (roughly a 2–5cm layer worked into the top 20cm). Effects are permanent and cumulative — each year's application adds to a growing soil carbon bank.
· · ·
VII
Hugelkultur
No-dig beds without cardboard — using buried wood to feed soil for decades
Building a hugelkultur bed — the self-watering, self-feeding raised bed
Skill 1$ Free
"Hugelkultur is what happens when you understand that a fallen log in a forest is not waste. It is a water reservoir, a fungal nursery, a nutrient bank, and a slow-release fertiliser all in one. The hugelkultur bed recreates this deliberately."
How it works

Buried wood acts as a sponge — absorbing water during rain and releasing it slowly during dry periods. As it decomposes (over 5–20 years depending on wood type), it feeds soil biology continuously. A mature hugelkultur bed is essentially self-watering and self-fertilising, requiring no cardboard, no imported compost, and minimal external input. Year one is modest; by year three it is thriving.

Build steps
  1. Choose the site: full sun preferred, but hugelkultur handles partial shade better than most growing systems because the water retention compensates for reduced photosynthesis. On a slope, build the bed on contour — it will function as a swale as well as a growing bed.
  2. Mow or cut any existing vegetation short. Do not remove it — it becomes the base layer. No digging required for a surface bed; for maximum water retention, dig a shallow trench 30cm deep and pile excavated soil to the side.
  3. Lay the largest logs first, directly on the ground (or in the trench). Rotting wood is better than fresh — it has already begun the decomposition process and is inoculated with beneficial fungi. Use any untreated wood: fallen trees, prunings, old posts. Mānuka and kānuka are excellent — hardwood logs rot slowly and hold water well.
  4. Fill gaps between large logs with smaller branches, sticks, leaves, straw, and any other organic material. The goal is a densely packed woody mound with minimal air pockets.
  5. Layer grass clippings, manure, compost, or kitchen scraps over the wood. This provides nitrogen to balance the high-carbon wood and accelerates decomposition.
  6. Cover the entire mound with 15–20cm of topsoil or compost. The finished mound should be 60–120cm tall — it will settle significantly in the first season.
  7. Water the entire mound thoroughly before planting. Plant immediately into the top and sides of the mound. The sides can also be planted — a large hugel bed offers considerable growing surface.
  8. Year one management: the decomposing wood initially draws some nitrogen from the surrounding soil biology. Supplement with a nitrogen-rich surface mulch (grass clippings, comfrey leaves, or diluted urine applied as liquid feed). By year two this self-corrects.
Long term behaviour
  • Years 1–3: establishment. Some nitrogen competition from wood decomposition; supplement with comfrey or grass mulch. Water needs are reduced but not eliminated.
  • Years 3–7: peak productivity. Fungal networks fully established. Water retention near maximum. Very little supplemental irrigation needed even in dry Waikato summers.
  • Years 7–20: gradual lowering as wood fully decomposes. The resulting soil is extraordinarily rich — rebuild with new wood layers at this point.
· · ·
VIII
Paper Making
From hemp, harakeke, and recycled fibre — producing paper and card at the village scale
Hand papermaking — a complete process from fibre to finished sheet
Skill 2$ Low
Fibre sources in Aotearoa
Hemp towThe short fibre waste from hemp processing (hackling) is ideal for paper. Already partially processed. Strong, long fibres produce durable paper.
Harakeke (NZ flax)Dried outer leaves beaten and cooked produce excellent paper fibre. Traditional Māori use includes woven fibre — the papermaking process simply goes further.
Recycled paperShredded waste paper re-pulped is the simplest source. Lower quality than virgin fibre but adequate for most documentation and wrapping purposes.
Grass and strawDried grass, wheat straw, or oat straw cooked in lye water produces usable paper pulp. Shorter fibres than hemp — produces lighter, more brittle paper.
Cattail / raupoRaupo (bulrush) leaves, dried and processed, are a traditional papermaking fibre in many cultures. Common in Waikato wetland margins.
Old clothing (linen, cotton)Natural fibre fabric scraps re-pulped produce the finest paper. The original rag paper used for centuries in European bookmaking.
What you need
Mould and deckle — a wooden frame with fine mesh screen (window screen or woven fabric works). Two frames: the mould (mesh) and deckle (open frame that sits on top to contain pulp).
Vat — any large, flat container deep enough to submerge the mould. A plastic storage tub works well.
Blender or stamper — to beat fibre into pulp. A hand blender works for small batches; a wooden stamper (heavy pestle in a mortar) works without electricity.
Felts or old wool blankets — for pressing and drying sheets between.
Cooking pot for fibre preparation.
Wood ash lye solution (weak) for cooking fibres.
Build steps
  1. Prepare fibre: for hemp tow or plant fibre — cook in a weak lye solution (1 tablespoon of ash lye per litre of water) for 2–4 hours until soft and easy to pull apart. Rinse thoroughly until rinse water runs clear. For recycled paper — soak torn pieces in water overnight.
  2. Beat the fibre to pulp: place small amounts of cooked fibre with water in a blender and pulse until a smooth, fibrous slurry (no visible long fibres remaining). This is your paper pulp. Keep it diluted — roughly 1–2% fibre in water.
  3. Fill the vat with water. Add several ladles of pulp to the vat and stir well to distribute evenly. The concentration determines sheet thickness — experiment to find your preference.
  4. Hold the mould (mesh side up) with the deckle placed on top. Submerge the pair into the vat at an angle, then level out and lift straight up through the pulp layer. The fibre catches on the mesh; water drains through.
  5. Hold level and allow excess water to drain for 1–2 minutes. The wet sheet of fibre is now on the mesh.
  6. Remove the deckle. Invert the mould over a damp felt or cloth, pressing the sheet onto the surface. This is called couching. Lift the mould — the wet sheet should transfer cleanly to the felt.
  7. Layer sheets between felts. Press the stack firmly with boards and weight (or a simple screw press if built) to remove as much water as possible.
  8. Separate sheets from felts and allow to dry — hang in a warm, ventilated space, or press-dry between boards. Sheets dry flat when pressed; they curl if allowed to dry freely. A light ironing when almost dry helps flatten them.
  9. Size the finished sheet (optional) if a less absorbent surface is needed for writing: brush lightly with a dilute starch solution (cooked potato water, rice water, or arrowroot) and allow to dry. This fills surface pores and reduces ink bleed.
· · ·
IX
Fibre, Rope, and Textile Production
Hemp, harakeke, and wool — from raw material to rope, cloth, and clothing
Rope and cordage from plant fibre
Skill 1$ Free

Rope is one of the most critical materials in any productive community — and one of the easiest to produce from local materials. Hemp bast fibre, harakeke, and dried native grass all produce strong rope using only hand techniques.

Basic two-ply rope twist
  1. Prepare fibre bundles of consistent thickness — 20–30 fibres per bundle, as long and parallel as possible. Hemp line fibre, stripped harakeke leaves (outer green layer removed, leaving the white inner fibre), or dried cabbage tree leaves all work.
  2. Twist one bundle clockwise between your palms until it wants to kink. Keep tension on it with one hand.
  3. Begin twisting a second bundle clockwise in your other hand. As each is under clockwise tension, wrap them around each other counterclockwise. The opposing twists lock the structure — the more tension, the tighter the rope.
  4. To join new fibre and extend the rope: overlap new fibre bundles 10–15cm with the ends of existing ones and continue twisting. Well-joined rope has no weak points at junctions.
  5. Three-ply rope (stronger): produce three two-ply cords, then twist three together in the opposite direction using the same principle. This is the structure of conventional rope.
  6. For harakeke rope specifically: the traditional Māori technique involves splitting leaves lengthwise into fine strips and twisting while still green and pliable. The finished rope is dried and is extremely durable — salt and moisture-resistant.
Spinning and weaving — from fibre to cloth
Skill 2$$ Med
Drop spindleThe simplest spinning tool — a weighted stick that hangs and twists fibre into yarn by its own rotation. One piece of wood and a weight (carved wood disc, stone with hole). Every culture in human history invented this independently. Hemp tow and sheep wool both spin well on a drop spindle.
Spinning wheelCan be built from hardwood using basic carpentry tools. Increases spinning speed 5–10x over a drop spindle. The Saxony wheel design is the most buildable — plans are freely available and all components can be made from local timber and basic hardware.
Frame loomFour pieces of timber, notched at regular intervals to hold warp threads. Enough to produce fabric of any length in strips up to the loom width. Weavable from first principles — no instruction needed beyond over-under-over.
Backstrap loomThe most portable weaving system — one end of the warp attaches to a fixed point (tree, post), the other to a strap around the weaver's waist. Tension is controlled by leaning back. Used across South America, Southeast Asia, and many other traditions. Produces fine, strong fabric.
NZ wool: New Zealand has world-class wool sheep genetics. Local farming families often have wool to sell or trade. Raw fleece is available inexpensively — sometimes free from farmers who find it uneconomic to process commercially. Washing, carding, and spinning raw wool into usable yarn is a highly valuable community skill. Combined with hemp yarn, wool-hemp blended fabric is warmer and more durable than either alone.
· · ·
IX·II
Adhesives
Production, applications, and the full range from natural resins to contact cement
Natural adhesives — what the community can produce from existing systems
Skill 1$ Free
Hide glue — the woodworker's adhesive

Made by boiling animal connective tissue (hides, bones, tendons — all byproducts of the whole-animal processing described in Living Systems, Document IV) until the collagen dissolves into a gelatinous liquid, which sets rigid on cooling. Used by furniture makers and instrument builders for centuries because it is strong, reversible with heat and moisture (allowing repair without destruction), and bonds wood fibre to fibre rather than surface to surface. When a hide-glued joint fails under stress, the wood fibres tear before the glue line — this is the correct failure mode for a structural joint.

  1. Source material: clean skin scraps, bone, and connective tissue from any butchering. Avoid hair, fat, and meat — these contaminate the glue and reduce strength. Rinse thoroughly.
  2. Soak overnight in cold water to soften. Drain. Cover with fresh water and simmer very gently (never boil vigorously — this degrades the collagen chains and weakens the final glue) for 4–8 hours until all material has dissolved into a thick, dark liquid.
  3. Strain through cloth to remove all solid residue. The liquid can be used immediately as liquid hide glue, or poured into shallow trays and allowed to set into solid cakes for storage. Dried hide glue cakes keep indefinitely. Rehydrate and melt in a double boiler before use — never apply dry heat directly, as overheating destroys the bond strength.
  4. Use hot, on warm wood. Apply to both surfaces, assemble immediately, and clamp firmly. Full strength develops over 24 hours. Gel time is short — this is a speed-sensitive process requiring preparation before mixing.
Pine rosin adhesives — flexible and waterproof

Pine rosin (colophony — the solid resin remaining after turpentine distillation from pine resin, or collected directly from pine cuts) melts at approximately 70–80°C and can be used alone or blended as an adhesive. Alone it is brittle; blended with beeswax (2:1 rosin to wax by weight) it becomes the traditional pitch used for waterproofing, sealing, and structural bonding in historic boat building and tool hafting. The same blend that seals a wooden water vessel also bonds a stone arrowhead to a wooden shaft — a versatile material requiring only two community-produced ingredients.

Casein glue — from dairy waste

Casein — the protein in milk — produces a strong, water-resistant adhesive when precipitated and combined with an alkali. Used historically in wood gluing, paper, and early plastics (Galalith was a casein-formaldehyde plastic). Community production: acidify skim milk (lemon juice or vinegar) until the casein curds form. Drain and rinse. Dissolve the damp curds in a small amount of sodium hydroxide or wood ash lye solution until smooth. Apply immediately — the working time is short and the glue sets firmly within hours. Strong enough for wood joinery; water-resistant but not waterproof. The whey drained from the process is the same whey described in Living Systems — nothing is wasted.

Starch paste and flour paste

The simplest adhesive: cooked starch (any grain flour, potato starch, arrowroot) in water produces a paste adequate for paper, cardboard, bookbinding, and light fabric work. Wheat paste (wallpaper paste) is made by cooking flour in water until thickened — heat to 70°C while stirring constantly. Works well for the paper-making described in Layer Zero Section VIII and for document binding and archiving. Not water-resistant; not structural. Cheap and immediately available from any kitchen.

Blood glue

Fresh or dried blood dissolved in water, with a small addition of lime (calcium hydroxide), produces a strong protein-based adhesive that sets irreversibly when heated. Used historically in exterior wood joints and for bonding leather. The blood meal available from butchering (Living Systems, Document IV) is the source. Not as strong as hide glue for indoor woodwork, but more water-resistant. Apply, assemble, and cure with gentle heat — 60–80°C for 30 minutes sets the joint permanently.

Intermediate and modern adhesives — sourced but worth understanding
Skill 2
Cyanoacrylate (super glue)

Cyanoacrylate adhesive polymerises instantly in the presence of moisture — including the thin moisture film on skin and most surfaces. This is why it bonds skin so effectively and why it has genuine medical application (see Community Life, Document VI, Section II). Not community-producible — requires industrial synthesis from cyanoacetate precursors. Worth stocking in meaningful quantity. Stores 1–2 years sealed; degrades rapidly once opened. Key applications: fast repair of hard materials (ceramics, metals, rigid plastics), field wound closure, and bonding dissimilar materials where mechanical fasteners are impractical.

Epoxy resin

Two-part thermosetting adhesive — resin and hardener combine to produce an extremely strong, chemically resistant bond. Not community-producible currently, but a critical structural adhesive for composite construction (hemp fibre composites described in Layer Zero Section II), waterproofing, and repair of metal and ceramics. Stock 5-minute epoxy for repairs and slow-cure structural epoxy for composite work. Epoxy shelf life is 1–2 years; store cool and sealed.

Contact cement — rubber-based bonding

Applied to both surfaces, allowed to become tacky, then pressed together — bonds on contact with no clamping time required. Essential for bonding leather, rubber, foam, and laminates where clamps are impractical. Not producible at community scale currently. For leather work specifically (Living Systems, Document IV, Section V), contact cement is the most practical adhesive for large surface areas. Natural rubber dissolved in a petroleum solvent is the historical formulation — with solvent recovery from the distillation section and natural rubber where accessible, this approaches community production in the long term.

Waterglass (sodium silicate) — the inorganic adhesive

Sodium silicate solution — producible by dissolving silica sand in hot sodium hydroxide solution under pressure, or by fusing sand with soda ash at high temperature and dissolving the result — is a versatile inorganic adhesive and sealant. Sets permanently on contact with air or acid. Applications: bonding ceramics and stone (the only adhesive that survives kiln temperatures), fireproofing timber, sealing porous ceramics, and as an egg preservation medium (eggs stored in waterglass solution remain edible for 9–12 months without refrigeration — a significant food preservation option). The NZ connection: sodium silicate is available commercially as a pool and concrete sealer; community production requires the glass furnace heat described in Layer Zero Section XVI or pressure cooking with sodium hydroxide.

Application summary — which adhesive for which job
Wood joinery (interior)Hide glue — traditional, strong, repairable, zero cost from butchering byproducts
Wood (exterior or waterproof)Casein with linseed oil, or epoxy for structural. Pine rosin pitch for non-structural waterproofing
Paper and bookbindingStarch paste — cheap, reversible, archivally stable
LeatherHide glue for flat joins; contact cement for large surface areas
Metal to metalEpoxy structural adhesive, or traditional tin-lead solder where conductivity is needed
Ceramics and stoneWaterglass (high-temperature stable), or casein glue for room-temperature applications
Tool haftingPine rosin-beeswax pitch — traditional, effective, reworkable with heat
Wound closureCyanoacrylate — see Community Life, Document VI, Section II for correct application and contraindications
Composite constructionEpoxy with hemp fibre reinforcement — see Layer Zero Section II
· · ·
X
Clay, Ceramics, and Lime
Vessels, waterproofing, and mortar from what is underfoot
Sourcing and testing clay — Waikato specific
Skill 1$ FreeNZ Specific
Waikato clay: The Waikato and Hauraki regions have extensive clay deposits — particularly along riverbanks, road cuts, and in the subsoil beneath the allophanic topsoil. The region's volcanic geology includes various clay minerals including halloysite (used in commercial porcelain) and more common illite and smectite clays suited to general pottery and building use.
Finding and testing clay
  1. Look for clay in road cuts, riverbanks, and anywhere deep earth has been exposed. Clay is typically grey, blue-grey, or red-brown, feels smooth and plasticky when wet, and leaves a stain on the hands.
  2. Plasticity test: take a small ball of moist clay and roll it into a rope 3mm thick. Bend it into a U-shape. Good plastic clay bends without cracking. Cracking clay has too little plasticity — blend with finer clay or age it longer.
  3. Shrinkage test: make a tile 10cm long, mark 5cm with a pin. Allow to dry completely. Measure the marked section — good clay shrinks 10–15%. More than 20% shrinkage means high plasticity that needs tempering (adding sand or grog — fired, ground clay).
  4. Impurity test: roll a small amount in your palm — any gritty or sandy feel indicates impurities. Sieve raw clay through a fine mesh screen after mixing into a slip (clay and water slurry) to remove stones and organic matter.
Basic pottery without a wheel — pinch and coil
  1. Wedge clay first — slam repeatedly on a board and fold to remove air bubbles. Air bubbles in fired clay cause explosive failure in the kiln.
  2. Pinch pots: start with a ball, push thumbs into the centre, and pinch outward. Simple, effective, produces bowls and cups.
  3. Coil building: roll long coils of clay (pencil to finger thickness), build walls by layering and blending coils together. Allows construction of larger vessels — water storage jars, cooking pots, fermentation crocks.
  4. Dry slowly and evenly — clay dried too quickly cracks. Cover with plastic to slow the drying process, especially in NZ's breezy conditions. Fire only when completely dry (bone dry — no cold feeling when held to the cheek).
Pit firing (no kiln required)
  1. Dig a pit 60–90cm diameter, 40–50cm deep. Line with dry wood kindling.
  2. Pre-heat pottery by placing around a small fire for 30–60 minutes before placing into the pit. Thermal shock from cold clay into hot fire causes cracking.
  3. Place pottery in the pit on the kindling bed. Pack with more wood around and on top. Cover with earth, leaving a small opening for airflow.
  4. Fire for 2–3 hours, maintaining heat. Pit-fired pottery reaches approximately 600–900°C — sufficient for water-carrying vessels though not fully vitrified (some porosity remains — seal with tree resin or tallow for waterproofing).
Lime production from limestone
Skill 3$$ MedNZ Deposits
NZ limestone: Significant limestone deposits exist throughout the Waikato — the Waitomo and Te Kuiti regions sit on extensive marine limestone formations. Limestone (calcium carbonate, CaCO3) heated to 900°C+ produces quicklime (CaO), which when slaked with water produces hydrated lime (Ca(OH)2) — the binding agent for hempcrete, lime plaster, limewash, and lime mortar. This is the cement of the pre-industrial world and remains one of the most useful building materials available.
  1. Source limestone: pure white or grey limestone is best. Shell middens, sea shells, and coral are also calcium carbonate and can be burnt for lime — historically common in coastal NZ communities.
  2. Build a simple clamp kiln: alternating layers of limestone and fuel (coal, wood, or coke), packed densely. Or a purpose-built dome kiln with a fire chamber at base and limestone packed in above. The critical requirement is sustained temperature above 900°C for several hours.
  3. Fire and maintain temperature for 8–24 hours (larger kilns need longer). The limestone glows and loses approximately 40% of its weight as CO2 is driven off. The remaining material is quicklime — pure white, light, and reactive.
  4. Slake the quicklime with great caution: add small amounts of water to quicklime in a metal or stone vessel. The reaction is violently exothermic — the lime heats to boiling point and spits. Add water slowly. This converts CaO to Ca(OH)2 — hydrated lime, which is safe to handle (though still strongly alkaline).
  5. Putty lime: slake with excess water and allow to settle. The cream-like lime putty that remains improves with age — traditional lime putty was aged for years before use. The older, the better the workability and strength.
  6. Use as: lime mortar (mixed with sand), lime plaster (interior and exterior walls), limewash (diluted — an excellent, breathable, antifungal wall coating), hempcrete binder, and soil pH correction.
Quicklime hazards
  • Quicklime (CaO) before slaking is highly reactive — contact with moisture (including eye moisture) causes severe burns. Full eye protection and gloves are mandatory.
  • The slaking reaction generates intense heat. Never seal a container of quicklime being slaked — steam pressure will burst it. Use open, stable vessels.
  • Lime dust (both quicklime and hydrated) is caustic to the respiratory tract — dust mask minimum when working with dry lime.
· · ·
XI
Community Forestry and Timber
Sustainable harvest, milling, and the long investment of tree planting
Establishing a community woodlot — the 30-year investment
Skill 1–2NZ Species
"The best time to plant a tree was 30 years ago. The second best time is now. The community that plants nothing will cut nothing. The community that plants strategically will have timber, fuel, medicine, and food from the same land."
NZ species selection — plant for multiple uses
Mānuka and KānukaFast-growing pioneer species. Fuel wood (excellent burn quality), honey production, medicine, charcoal, and nursery cover for slower natives beneath. Plant first — they establish the conditions everything else needs.
TōtaraNZ's premier timber tree. Rot-resistant, workable, durable — used for posts, building timber, carving. Slow growing (50–100 year harvest) but should be planted in every community that intends to be here long-term.
Macrocarpa (Monterey cypress)Fast-growing, wind-resistant, excellent structural timber. 20–30 year harvest cycle. Widely used in Waikato farm buildings. NZ-adapted. Easy to establish. Good fuel and timber species.
Eucalyptus (selected species)Very fast-growing (some NZ-suited species ready in 8–15 years for coppice), excellent firewood with very high BTU. Nitens and globulus suited to Waikato. Coppices reliably — cut and regrows from stump, eliminating replanting.
Alder (Alnus species)Nitrogen-fixing tree — enriches soil as it grows. Excellent coppice species for continuous firewood production. Fixes up to 100kg nitrogen per hectare per year — a living fertiliser factory with structural timber as a co-product.
Black walnut / NZ walnutsFood (nuts), medicine (hulls), and highly prized cabinet timber. 30–50 year investment for timber but nut production begins at 5–8 years. A genuine wealth crop for a patient community.
Coppice system — continuous timber without replanting
  1. Coppicing is cutting trees at the base on a rotation cycle so they regrow from the stump (coppice stool). It produces a continuous supply of poles and small-diameter timber without replanting — the root system remains, growth is rapid.
  2. Establish coppice blocks with suitable species: hazel (best for poles), alder (nitrogen-fixing + poles), willow (fastest — useful for wattle-and-daub, basket weaving, biomass), eucalyptus, and mānuka.
  3. Rotation cycles: willow 2–5 years, hazel 7–10 years, alder 8–12 years, eucalyptus 8–15 years depending on use.
  4. Cut blocks on rotation so not all are cut in the same year — this ensures continuous supply and maintains habitat structure.
Milling timber — from log to usable lumber
Skill 2$$ Med
Chainsaw millingAn Alaskan mill attachment converts a chainsaw into a portable sawmill. Produces flat boards from logs in situ — no infrastructure needed. The log is milled where it falls. Slow but completely mobile and inexpensive to acquire.
Portable bandsaw millFaster and cleaner than chainsaw milling. Produces accurate, consistent dimensioned lumber. Can be built from plans or purchased (Lucas Mill, Wood-Mizer). A community sawmill used cooperatively is one of the most valuable shared tools possible.
Pit saw (hand tool)Two-person crosscut saw, one person in a pit below the log, one above. Slow, exhausting, produces accurate planks with no power source. The original village sawmill. Worth knowing as a backup for when fuel and power are unavailable.
Green timber useFreshly milled green timber can be used immediately for structural applications (posts, beams, framing) — it is actually easier to work than dried timber. It will shrink and check as it dries in place, which must be accounted for in joinery. For furniture and fine work, air-dry for 1 year per 25mm of thickness before use.
Timber preservation without chemicals
  1. Charring (Yakisugi / Shou Sugi Ban): burn the outer surface of timber until a 2–3mm layer of char forms. Wire-brush or leave as is. The char layer is naturally resistant to rot, insects, and UV — no chemical treatment needed. Traditional Japanese technique, increasingly used worldwide.
  2. Tallow or linseed oil soaking: repeatedly coat timber with rendered tallow or raw linseed oil, allowing full absorption between coats. Penetrates and seals the wood against moisture. Particularly effective on end grain.
  3. Tannin treatment: soak or brush timber with strong tannin solution (tea, oak bark decoction, or walnut hull extract) before any other treatment. Tannins cross-link with wood lignin and significantly increase rot resistance.
· · ·
XII
Mining and Raw Material Acquisition
Clay, stone, iron, gravel, flint — what lies underfoot and how to reach it responsibly
Material resources of the Waikato and Hauraki — what exists and where
NZ Specific
ClayExtensive deposits throughout the region, particularly in river banks and road cuts. Halloysite clay (excellent for ceramics) around Matauri Bay. Red clays (iron-rich) in many Waikato hill country exposures. Available at surface level in most areas — requires no mining, only digging.
Limestone and shellrockWaitomo, Te Kuiti, and the wider King Country sit on substantial marine limestone. Closer to home — Raglan and west coast areas have shell-sand and shellrock that can be burnt for lime. Accessible as surface exposures in many locations.
River gravel and sandWaikato and Waipa rivers carry excellent building aggregate. Extraction from active riverbeds requires consent — collect from stable terrace deposits and banks above flood level, or from sources where flooding naturally deposits and replenishes material.
PeatThe Hauraki Plains are underlain by deep peat deposits — historically one of the largest peatlands in NZ. Peat is a fuel (though a carbon-costly one) and can also be used as a soil conditioner for acid-loving plants. Extraction must be approached carefully — peatlands are significant ecosystems.
Volcanic rock (scoria, pumice)Pumice deposits from Taupo eruptions are widespread in Waikato soils and subsoils. Lightweight aggregate for building (concrete substitute), excellent soil drainage amendment, and abrasive for tool finishing.
Iron oreIronsand (titanomagnetite) deposits exist on NZ's west coast beaches — Waikato coast, Raglan, Kawhia. These black sands are the same source historically used for traditional iron smelting in Japan (tatara process). Requires significant processing but provides a genuine long-term domestic iron source.
Flint / chertSharp-flaking stone for edge tools is available in some NZ limestone formations and riverbeds — look for glassy, fine-grained stone that rings when struck. Not as abundant as in Europe but present in specific geological zones. Obsidian (volcanic glass) is NZ's finest traditional edge material — sourced from specific volcanic regions.
CopperSignificant copper mineralisation on the Coromandel Peninsula — historically prospected and partially mined. Not accessible without serious equipment but worth knowing as a medium-term resource. Scrap copper reclamation (from old wiring, plumbing) is more immediately practical.
Legal and ethical considerations
  • All mineral resources in NZ are Crown-owned under the Crown Minerals Act — commercial extraction requires a permit. Personal and community use of surface materials (clay, stone from your own land) is different in practice if not always in law.
  • Riverbed extraction requires resource consent under the RMA in virtually all cases. Work with what erodes naturally and accumulates on banks above the active channel.
  • Some sites of cultural significance (urupā, wāhi tapu) are legally protected. Any significant earthwork in the Waikato should involve inquiry about cultural significance before proceeding.
  • Mining activities — even small scale — carry real risks: unstable ground, confined space gas accumulation, flooding. Never dig deeper than your arm's length without shoring or a partner present.
· · ·
XIII
Blacksmithing and Metalworking
From scrap reclamation to working iron — the foundational craft of every tool-using community
Why every community needs a blacksmith — and how to become one
Skill 3$$ Med
"The blacksmith is not optional. Every other craftsperson depends on the blacksmith's tools. When the last manufactured tool wears out and cannot be replaced, the community with a forge and a smith continues. The community without one stops."
The learning sequence
1
Fire management
Understanding and controlling forge heat. The whole craft begins here.
2
Basic drawing out
Tapering a bar into a point — the first fundamental operation.
3
Bending and scrolling
Hooks, rings, brackets — the most-needed shapes for community infrastructure.
4
Punching and drifting
Making holes — essential for tool handles, hinges, chain links.
5
Cutting and chiselling
Dividing stock, making chisels themselves.
6
Tool forging
Axes, knives, hoes, chisels — applying all previous skills.
7
Heat treatment
Hardening and tempering — turning soft iron into tool steel.
8
Welding
Fire welding — joining iron without electricity.
Building a forge — from minimal to functional
Skill 2$$ Med
Minimum viable forge
  1. The fire pot: a depression or container for the coal or charcoal fire. A simple clay-lined hole in the earth, a cast iron brake drum from a truck, or a welded steel box. It needs an air inlet at the base — a tuyere (air pipe) pointing upward into the centre of the fire.
  2. Air supply — the critical element: a fire hot enough to work iron (900–1300°C) requires forced air. Options: a hand-cranked blower (old forge blowers appear at farm sales regularly), a surplus centrifugal fan, a foot-operated bellows (build from two boards with leather flaps and a nozzle), or a simple vacuum cleaner in reverse. Even a pair of lungs and a long metal pipe can work for brief sessions.
  3. Charcoal vs coal: charcoal is what a community can produce itself (Section VI). Coal burns hotter and longer but requires sourcing. For a community forge, charcoal from dense hardwood (mānuka, kānuka, beech) produces sufficient heat for most operations. Coke (from coal) or metallurgical charcoal is preferred for heavy work and forge welding.
  4. The anvil: a large mass of steel that doesn't move when struck. A purpose-built anvil is ideal but any large piece of dense steel serves — a section of railway track (flat face up), a large sledgehammer head, or a steel block. Heavier is better — the anvil should not bounce. Mount on a hardwood stump at comfortable working height (knuckle height when standing).
  5. Tools: two hammers minimum — a 1.5–2kg cross-peen hammer and a 3–4kg sledge for striking (when working with an assistant). Tongs (many types — start with simple flat-jaw tongs that grip bar stock). Hardy and punch tools fit into the anvil's hardy hole. A wire brush for scale removal. A bucket of water for quenching.
  6. Workshop: a roof and good ventilation are both required. Coal/charcoal forge smoke and scale are significant. The smith stands at the anvil with the forge close to their dominant hand. All fuel, quench water, and tools within arm's reach.
Working with scrap metal
  1. NZ has extensive scrap metal in rural areas — old farm machinery, fence posts, vehicle axles, leaf springs, railway track. This is your primary metal source before any domestic iron production.
  2. Identify your steel: mild steel (most structural steel, angle iron, rod) is soft and workable but does not harden significantly for tools. High carbon steel (leaf springs, coil springs, files, old chisels, ball bearings) can be hardened and tempered for cutting tools and blades. Spark test: grind against a wheel — mild steel makes a long, few-branching spark; high carbon steel makes shorter, heavily-branching sparks.
  3. Farm auctions, scrap metal dealers, and rural roadsides are the best sources. Build relationships with farmers who have machinery graveyards — most are happy to see usable material recovered.
Basic heat treatment — hardening and tempering
  1. Harden: heat high-carbon steel to non-magnetic (test with a magnet — steel loses magnetism at correct hardening temperature, approximately 800°C). Quench immediately in water, brine, or oil (oil produces less cracking). The steel is now very hard but also brittle — it will shatter under impact.
  2. Temper: clean the hardened surface with abrasive paper until bright. Gently reheat the back of the tool and watch the colour travel toward the edge: pale yellow (58–60 HRC, maximum hardness — for fine edge tools), straw yellow (scrapers, chisels), brown-purple (axes, drawknives), blue (springs, punches). Quench again when the desired colour reaches the cutting edge.
  3. This process converts brittle hardened steel into tough, wear-resistant tool steel. A well heat-treated tool made from a leaf spring will outlast many purchased tools of inferior quality.
Iron smelting — the bloomery — producing iron from NZ ironsand
Skill 3$$$ HighLong term
The long-term context
This is a 5–15 year community project, not a weekend task. Building the knowledge, the infrastructure, and the fuel supply to smelt domestic iron from NZ ironsand is a significant undertaking. It is included here because the community that understands it — even years before they attempt it — makes different decisions about forestry, charcoal production, and metalworking skills than one that does not. The bloomery is the foundation of the iron age. It requires no industrial inputs whatsoever.
Overview of the process
  1. Collect ironsand from west coast NZ beaches (Waikato coast, Raglan, Kawhia). The black sand is titanomagnetite (FeTiO3 and Fe3O4). Separate from grey silica sand using magnets — a magnet dragged through dry sand collects the iron-bearing fraction. Collect large quantities over time.
  2. Reduce the ore: NZ ironsand was traditionally processed using a tatara-inspired process. The principle is the same as any bloomery — ore mixed with charcoal in a clay-lined furnace, with air blast. Carbon in the charcoal combines with oxygen in the iron oxide, releasing CO2 and leaving metallic iron.
  3. Build a clay bloomery shaft furnace 40–60cm tall, 25–30cm internal diameter, with a tuyere (air inlet) at the base angled upward into the lower furnace. The interior must withstand 1300–1500°C — use high-quality refractory clay mixed with sand and grog.
  4. Charge the furnace with alternating layers of charcoal and ironsand. Blow air continuously for 2–4 hours while adding more charcoal and ore from the top. The ore smelts and collects as a spongy iron bloom at the base.
  5. Remove the bloom (the consolidated iron mass) while still hot, using tongs. Immediately hammer to consolidate and expel slag inclusions while at welding heat. This is the critical step — the bloom must be worked immediately before it cools.
  6. The resulting wrought iron is low-carbon, tough, and weldable. It can be carburised (heated in contact with charcoal) to add carbon and produce a steel capable of heat treatment. This is the same process that produced all iron tools in human history until the industrial era.
Skill transfer: The tatara iron-making tradition of Japan (which used similar beach sand ores) is the best-documented small-scale iron production process available. Japanese blacksmithing guilds have maintained this knowledge continuously. Their documentation and the broader bloomery iron literature is available in the offline library (Wikipedia has extensive bloomery smelting coverage; add specific search terms to your Kiwix download list).
· · ·
XIV
Tool Making and Repair
Handles, hafting, edge tools, and the culture of tool care
Priority tools to make and maintain — the village toolkit
Skill 2
The priority toolkit for community food and building production
Hoes and mattocksThe primary hand tool for food production. Forge from leaf spring or bar stock. Handle from straight-grained ash, hickory, or NZ equivalent (ake ake, tōtara). The geometry of the blade angle determines its ease of use — a well-made hoe is a lifetime tool.
Axes and maulsFelling, splitting, and hewing timber. Forge the head from medium-carbon steel. Handle from curved-grain timber that will absorb shock — never straight-through straight grain. Sharpen with a file and finish with a whetstone.
ScythesFar more efficient than any other hand tool for cutting grass, grain, and cover crops. An experienced scythesman can cut an acre per day. NZ has scythe suppliers; the skill of peening (cold-hardening the blade edge with a hammer and anvil) is what makes a scythe perform — and is easily learned.
Draw knife and spokeshaveFor shaping wooden handles, spokes, and chair parts. Forge from old files (high carbon steel). Simple flat-bevel geometry. Once learned, one of the most pleasurable and productive tools in the workshop.
Chisels and gougesMortise and tenon joinery requires chisels. These are the highest-skill forge pieces in this list — the geometry must be precise for them to work well. Start by rehandling and sharpening old chisels before attempting to forge new ones.
KnivesThe single most necessary tool a person can carry. Forge from old files or leaf spring. Learn to grind a geometry that holds an edge. A community that can make knives can make almost anything.
Drill bits and augersBoring holes in timber. Spoon bits, pod bits, and augers can all be forged. An auger brace (the handle) is easily made from bent rod. Without the ability to bore precise holes, timber joinery becomes nearly impossible.
Files and raspsThe meta-tool — used to sharpen and shape everything else. Not easily forged at home (requires very high carbon and precise heat treatment). Stockpile new files. Old files are raw material for knives and edge tools. Do not discard worn files.
SawsNot forgeable without specialised equipment. Stockpile quality handsaws and maintain them — a properly set and sharpened handsaw is among the most efficient tools in the workshop. Learn to sharpen and set saw teeth.
Tool handle making
  1. Source wood: handle wood must be tough, shock-resistant, and split-free. Best NZ options: puriri (if accessible), tōtara, ake ake. International favourites grown in NZ: ash, hickory. Avoid straight-grained timber for handles — the grain should flow with the shape.
  2. Dry the wood completely before shaping — green wood will shrink and the handle will loosen. Air dry for 1 year per 25mm thickness, or kiln dry (your rocket mass heater's warm mass surface works for slow drying of small pieces).
  3. Shape with drawknife and spokeshave, finishing with rasps and sandpaper. The handle should swell at the end (to prevent the tool sliding from the hand), be oval in cross-section (to communicate orientation through feel), and be smooth throughout.
  4. Fit the eye: the tool's eye (socket) should fit the handle snugly at first. Drive the handle in and check contact — the eye should mark the handle at the high points. Remove, pare those points down, refit. Repeat until the handle seats completely with even contact throughout the eye.
  5. Secure with wedges: cut a kerf down the top of the handle before fitting. Drive the handle home. Drive a wooden wedge into the kerf — this expands the handle inside the eye and locks it permanently. A steel cross-wedge driven perpendicular to the first completes the joint.
  6. Finish with linseed oil or tallow — applied hot and allowed to penetrate. Three to five coats. This seals and protects the wood and keeps it from drying and splitting.
Sharpening — the most important maintenance skill
  1. A dull tool is slower, more tiring, more dangerous, and requires more force than a sharp one. Sharpening is not finishing — it is an ongoing daily practice. Every session ends with tools sharpened and oiled.
  2. The basic sharpening sequence: coarse stone (removes metal quickly, shapes the bevel), medium stone (refines the scratch pattern), fine stone (polishes the edge), strop (aligns the final edge by stropping on leather with or without compound). Each stage removes the scratch pattern of the previous stage.
  3. Build a strop from leather glued to a flat piece of wood. Charge with green stropping compound (chromium oxide) or improvise with fine clay or even fine soil. A stropped edge will shave hair — this is the minimum acceptable standard for any edge tool going into productive work.
  4. NZ sharpening stones: the Waikato does not have traditional high-quality sharpening stone outcrops, but river-worn hard sandstone and some volcanic rocks will function for rough work. Natural Arkansas-equivalent stone can be sourced commercially. Stockpile synthetic sharpening stones of all grits — they are inexpensive, small, and last decades with care.
· · ·
XV
Natural Building Techniques
Cob, straw bale, timber frame, hempcrete, stone — shelter from what surrounds you
Overview — choosing the right technique for your materials and climate
Read first
Cob (clay, sand, straw)Best for: small structures, curves, sculptural forms, dry climates or well-protected sites. Uses: clay subsoil + sharp sand + straw, mixed by foot. Waikato application: very strong tradition; the allophanic subsoil needs testing (some allophanic clays are poor cob clays — too much halloysite). Blend with a more plastic clay source if available. Zero cost if materials are on site.
Straw baleBest for: excellent insulation value (R-30+), fast construction, larger rectangular structures. Uses: baled straw from grain crops (not hay — too much moisture) stacked and plastered with earth or lime. Waikato: barley and wheat straw widely available from Hauraki grain farms. NZ building code has a straw bale pathway. Exceptional warmth in NZ's cold winters.
Hempcrete (hemp + lime)Best for: new builds with timber frame, excellent long-term performance, breathable, pest-resistant. Details in Section II. Waikato: requires hemp growing licence and lime production or supply. 20–30 year investment to be fully self-sufficient in materials; can start with purchased lime and build toward own lime production.
Timber frame (post and beam)Best for: structurally robust buildings, large spans, earthquake performance. Uses community-milled timber. Compatible with any infill (cob, straw bale, hempcrete, rammed earth). The standard NZ rural building approach — knowledge is widely available locally.
Rammed earth (pisé)Best for: thermal mass, very durable, monolithic walls, well-draining sites. Mix: slightly moist subsoil with 5–10% lime or cement stabiliser, rammed in formwork in 10–15cm lifts. Waikato volcanic soils need testing — not all are suitable without amendment. Requires significant formwork but no kiln, no firing.
Dry stone wallingBest for: retaining walls, boundary walls, raised bed edges, foundations for other building systems. Requires no mortar, no tools beyond a hammer and chisel. The volcanic stones and river cobbles of the Waikato provide adequate material in most locations. A well-built dry stone wall lasts centuries with zero maintenance.
Cob building — a complete practical guide
Skill 2$ Free
Testing your clay for cob
  1. Jar test: fill a jar with subsoil and water, shake thoroughly, and allow to settle overnight. Sand settles first (bottom), silt above that, clay on top. Good cob soil is roughly 15–30% clay, 70–85% sand and silt. More clay = more cracking; more sand = less strength.
  2. Cigar test: roll a sausage of moist subsoil 2cm diameter, 10cm long. Hold from one end. If it hangs 5cm or more before breaking, clay content is adequate for cob without additions.
The cob mix
  1. Standard cob recipe (adjust based on your soil test): 1 part clay-rich subsoil + 2 parts sharp sand (not beach sand — sharp river sand) + straw (enough to create a visible, fibrous matrix throughout). Straw adds tensile strength and controls cracking.
  2. Mix by foot: the traditional and most effective method. Pile soil and sand on a tarp. Add water gradually until the mix is moist but not wet. Work in straw with your feet — stomp, fold, stomp. The mix is ready when no dry spots remain and straw is thoroughly incorporated.
  3. Test a sample: form a ball, allow to dry completely, then drop from shoulder height. If it holds together, the mix is good. If it shatters (too sandy) or cracks deeply (too much clay), adjust the ratio.
Building steps
  1. Foundation first: cob walls must sit on a stone or concrete foundation that lifts them above ground level and protects from rising damp. Minimum 30cm above exterior ground level. Dry stone foundation is entirely appropriate and beautiful.
  2. Work in lifts: apply cob in courses 15–30cm tall. Allow each course to partially dry (stiff but not cracked) before adding the next — typically 1–3 days depending on weather. Do not add wet cob to very dry cob without moistening the surface first.
  3. Work from outside: stand outside the wall and apply cob from the exterior. This compresses the wall outward and produces a stronger, denser structure than working from inside.
  4. Integrate openings as you build — wooden lintels (15cm deep minimum) above all door and window openings, built in as the wall reaches their height. Design openings before you begin; changing them afterward is very difficult.
  5. Wall thickness: 45–60cm minimum for structural walls in NZ's seismic environment. Thicker walls are more stable, better insulated, and more beautiful. Cob buildings traditionally have slightly tapered walls — wider at base than top.
  6. Protect the wall during construction: rain on uncured cob washes the surface. Cover the top of the wall with tarp at the end of every working day.
  7. Plaster before the building is used: a lime plaster exterior (2–3 coats) protects from erosion. A clay or lime plaster interior is breathable and compatible with the cob wall. Never use cement plaster — it seals the wall and traps moisture inside, causing structural failure over time.
  8. Roof overhangs: the most important protection for a cob wall is a wide overhang — minimum 60cm, 90cm preferred. Cob buildings with wide eaves have survived centuries. Cob buildings with inadequate eaves erode within a generation.
NZ seismic considerations
  • NZ sits on the Pacific Ring of Fire — seismic performance of earthen buildings is a serious consideration. Cob performs better in earthquakes than unreinforced masonry (brick, block) but still requires careful design: correct wall thickness, integrated timber ring beam at top of walls, good roof-to-wall connection, and no openings in the bottom third of wall height where possible.
  • For any permanent dwelling, engage with a structural engineer familiar with earthen construction. Several NZ engineers and builders specialise in this — Earth Building Association of NZ (EBANZ) is the connection point.
  • The Waikato sits in a relatively lower seismic hazard zone compared to Wellington or Christchurch, but hazard is not zero. Design accordingly.
Timber frame joinery — building without metal fasteners
Skill 3

Traditional timber frame joinery — mortise and tenon, through-wedged connections, dovetail notches — produces structures that have lasted 500+ years without a single nail or bolt. The joinery itself is the structure. This is the appropriate endpoint of the woodworking and smithing skills described above.

Mortise and tenonThe fundamental joint. A rectangular peg (tenon) fits into a matching hole (mortise) cut in the receiving timber. With a through-wedge (a wedge driven through a slot in the end of the tenon after assembly), it is self-tightening and permanent. The most load-capable timber joint.
Half-lap jointTwo timbers each notched to half their thickness, overlapping. Simple to cut, strong in compression. Used for wall plates, rafters, and cross-bracing.
Scarf jointJoins two timbers end-to-end to create a longer member. The long taper distributes load across the joint and prevents rotation. Locked with wooden pegs or a bridled key.
Dovetail notchA trapezoidal notch that locks a rafter or beam to a plate and cannot pull free under uplift load. Critical in NZ wind conditions. No nails, no bolts — the geometry does the work.
On learning: Timber framing requires practice on small joints before attempting a full structure. Build a workbench, a tool chest, or a small outbuilding first. The skills transfer directly and the mistakes are survivable. Ben Brungraber's timber framing manuals and the Timber Framers Guild have freely available detailed joint cutting guides — add these to your offline library.
· · ·
XVI
Glass Production
Vessels, optics, lab equipment, and the prerequisite material for electronics and solar
Why glass cannot be absent from the series
Foundation
"Glass is simultaneously the most ancient manufactured material and the most essential prerequisite for modern technology. Without it: no lenses, no laboratory equipment, no solar panels, no fibreglass composites, no screens, no optical instruments. Sand is everywhere. The knowledge of how to transform it is not."
The connection chain
Glass production connects to nearly every other section in the series. The still (Section XVII) requires glass vessels. The slow sand filter requires glass storage. Fermentation requires glass jars. Lab-quality medicine preparation requires borosilicate glass. Solar panel construction requires tempered glass. Optical lenses for instruments, magnification, and fire starting require glass. The community that cannot make glass is permanently dependent on the supply chain for its vessels, its instruments, and eventually its energy production.
What glass is — the chemistry

Glass is an amorphous solid — a substance that has cooled from a liquid state without crystallising. The most common glass (soda-lime glass) is approximately 73% silicon dioxide (SiO2, silica — sand), 14% sodium oxide (Na2O, from soda ash), 9% calcium oxide (CaO, from limestone), and small amounts of other oxides. These three components — sand, soda ash, and limestone — are all available in NZ. Soda ash is the only one that requires processing from a natural precursor (sodium carbonate from burned seaweed or saline lake deposits) or purchasing commercially.

NZ silica sand sources
West coast ironsand beachesThe same black ironsand beaches (Raglan, Kawhia, west coast) contain the titanomagnetite iron fraction and a silica sand fraction. After magnetic separation of the iron content, the remaining white-grey sand is high in SiO2. Pre-processing required: acid washing removes iron and mineral contamination for cleaner glass.
Inland river sandsWaikato and Waipa river beds contain silica-bearing sands. Quality varies — volcanic input means some NZ sands contain more iron and impurities than ideal. Iron in glass produces green or brown colour. For colourless glass, high-purity silica is needed. For coloured or tinted glass (perfectly functional for vessels and storage), river sand is adequate.
PumiceTaupo pumice is high in SiO2 and can substitute for or blend with sand as a glass ingredient. Widely available across the Waikato from Taupo eruption deposits in the subsoil.
Quartz veinsMilky quartz (near-pure SiO2) appears in rock outcrops throughout NZ hill country. Crush and grind to fine powder for high-purity glass. More work to process but produces the clearest glass.
Building a wood-fired glass furnace and making basic glass
Skill 3$$ Med
Temperature requirement: Soda-lime glass melts at approximately 1400–1600°C. This is achievable in a well-designed wood-fired furnace with forced air, but requires high-quality refractory insulation (the same materials used in the lime kiln — refractory clay mixed with grog). Below 1400°C the batch will not melt completely. The glass furnace is a significant construction project — plan it carefully before building.
Glass batch preparation
  1. Prepare silica: dry and grind sand to fine powder. Sieve to remove stones and large particles. For cleaner glass, acid wash with dilute hydrochloric or acetic acid to remove iron compounds, then rinse thoroughly and re-dry.
  2. Standard soda-lime batch by weight: 100 parts fine silica sand, 20 parts soda ash (sodium carbonate — Na2CO3), 12 parts calcium carbonate (from your lime production, Section X), and optional small additions: manganese dioxide (decolouriser, removes green iron tint — from battery manganese, manganese ore), or iron oxide (deliberate green colouring for bottles). Mix all components dry and thoroughly.
  3. Adding cullet (recycled broken glass — 20–30% of batch by weight) dramatically lowers the melting temperature and reduces energy consumption. Every piece of waste glass from the community has value as a future batch ingredient. Never discard glass — store broken pieces as cullet.
Furnace construction
  1. Build a continuous-firing furnace: a sealed chamber with a fire grate below and the crucible (a refractory clay pot containing the glass batch) above. The critical requirement is that the flame surrounds the crucible — direct flame contact on the crucible bottom causes thermal stress cracking. Flame should enter from the side or below, circulate around the crucible, and exit through a flue in the crown.
  2. Refractory lining: the furnace interior must withstand continuous operation at 1400°C+. Use refractory castable (alumina cement + grog) or hand-shape high-temperature refractory bricks. Standard firebrick (SK30-SK34) is adequate for the outer structure; higher-grade castable or SK38+ brick for the inner hot face.
  3. Forced air blast is essential: a bellows, a surplus centrifugal fan, or a repurposed vacuum motor forces sufficient oxygen into the combustion zone to reach glass-melting temperatures. Without forced air, wood fires typically reach only 900–1100°C — insufficient. The same forced-air principle applies as in the forge (Layer Zero Section XIII).
  4. Crucible: made from high-silica refractory clay, thrown on a pottery wheel or hand-formed with thick walls (25–35mm). Crucibles must be pre-heated very slowly before first use — heat at 50°C per hour to 1000°C, then full temperature. Thermal shock from rapid heating cracks the crucible and contaminates the glass melt with ceramic fragments.
  5. Charging the furnace: once the furnace reaches temperature, add glass batch gradually in small amounts rather than all at once. Each addition must melt before the next is added. Full melting of a typical batch takes 4–8 hours at temperature.
  6. Working temperature: for blowing and working, glass needs to be at 1000–1100°C — slightly cooler than the melting temperature, in the viscous-liquid range. Too hot = too fluid to gather and shape. Too cool = too stiff to work. The glassworker learns to read the temperature from the glow colour of the glass — bright orange-yellow is correct working temperature.
Basic forming techniques
GlassblowingGather molten glass on the end of a hollow iron blowpipe (60–120cm long, 20–30mm diameter — made by your blacksmith). Blow gently while rotating to inflate the gather. Shape with wooden tools, jacks (tong-like tools), and gravity. The most versatile forming technique for vessels, bottles, and art. Requires significant practice — produce containers on the first day, quality work after months.
CastingPour or ladle molten glass into a refractory mould. Produces flat slabs, lenses, thick blocks, and decorative objects. Moulds made from graphite, refractory clay, or carved sandstone. Slower cooling produces fewer internal stresses. Cast glass must be annealed (see below).
Fusing and slumpingPlace pieces of compatible glass in a kiln (1–2°C below melting point). Pieces fuse together. Slumping: heat glass over or in a mould until it softens and takes the mould shape under gravity. Makes flat panels, dishes, and shaped tiles. Requires a kiln reaching 750–850°C — lower temperature requirement than a full furnace.
Flat glass (crown method)Blow a large bubble of glass, transfer to a solid iron rod (pontil), remove the blowpipe, reheat and spin rapidly. Centrifugal force opens the bubble into a flat disc — the original method for window glass. Limited to approximately 60cm diameter before the technique fails. Adequate for small windows and framing.
Annealing — the critical finishing step
  1. All formed glass must be annealed — slowly cooled through a specific temperature range to relieve internal stresses. Glass cooled rapidly from working temperature is full of stress and will shatter from minor impact or temperature changes.
  2. Annealing range for soda-lime glass: 500–600°C. Place finished pieces into a kiln or annealing oven at 560°C immediately after forming. Hold for 30 minutes per 6mm of thickness, then cool at maximum 5°C per hour through the 500–400°C range. Below 400°C, cooling can be faster.
  3. A simple annealing kiln: an insulated metal box heated by a small wood fire or electric element to maintain 560°C. The community's pottery kiln works well — load glass pieces immediately after forming while the kiln is at temperature.
Borosilicate glass — for laboratory use

Standard soda-lime glass has a relatively high thermal expansion coefficient — it cracks when heated or cooled rapidly. Borosilicate glass (Pyrex-type) adds boric oxide (B2O3, approximately 13%) to the batch, dramatically reducing thermal expansion. It can withstand direct flame contact without cracking — essential for laboratory glassware, still components, and anything subjected to thermal cycling. Boric oxide is the limiting reagent — it requires either purchasing borax (sodium tetraborate — available commercially as a cleaning product) or mining naturally occurring boron minerals. Borax is also a flux in glassmaking that lowers melting temperature. A small borax addition to any batch improves workability even without producing full borosilicate glass.

Glass in the context of the series
Solar panel glassPhotovoltaic panels require tempered low-iron glass (3–4mm thick) with less than 0.01% iron content for maximum light transmission. This is a high-purity glass requiring careful silica selection and decolouring. The community glass operation produces this only with mature technique and high-quality silica. Medium-term goal rather than immediate production.
Fibre glass (fibreglass)Drawing molten glass into fibres produces fibreglass reinforcement material. The fibres are drawn through small platinum (or high-temperature alloy) bushings at the furnace outlet. Labour-intensive but produces a material that can replace the industrial fibreglass used in boat building, composite panels, and insulation. Hemp fibre composites (Layer Zero Section II) are the nearer-term replacement — fibreglass production is a 20-year community capability goal.
Glass production hazards
  • Molten glass at 1000–1400°C is an invisible hazard — it looks solid but flows and splashes. Full face shield, leather apron, and heat-resistant gloves are mandatory. Molten glass sticks to skin and cannot be quickly removed.
  • Silica dust from grinding and batch preparation causes silicosis — irreversible scarring of lung tissue — from chronic inhalation. Always wear a P2 or better dust mask when grinding, mixing, or handling dry glass batch. Wet-process grinding eliminates dust.
  • Thermal shock from adding cold or wet materials to a hot furnace can cause violent steam explosions. All materials added to a hot furnace must be pre-heated and completely dry.
  • Broken glass: all fragments are razor-sharp. Thick leather gloves for all handling of broken cullet and scrap. Never use bare hands.
· · ·
XVII
Plastics Production
Bio-based polymers, natural resins, and closing the plastic waste loop
The framing — why make plastic at all?
Read first
The community position on plastics
The goal is not to become a plastic-producing community. Plastic is often a poor material choice — durable for centuries when durability is not needed, brittle when durability is needed, and a persistent environmental contaminant when it escapes management. The goal is three things: understand how to produce the small amounts of specific functional plastics where no natural alternative is adequate, close the waste loop on plastic that already exists in the community's environment, and not be dependent on external supply for the particular applications where plastic is genuinely the best answer. The sections below are ordered from most to least desirable: bio-based first, waste-recycled second, waste-to-fuel last.
Bio-based plastics — PLA, PHB, and community-producible polymers
Skill 2–3$$ Med
PLA — polylactic acid from plant starch

PLA (polylactic acid) is a thermoplastic produced from lactic acid, which is itself produced by fermenting plant starch. It is the primary material in compostable packaging and the most commonly used biodegradable 3D printing filament. The production chain connects directly to the fermentation systems described in Living Systems (Document IV) — lactic acid is a fermentation product of Lactobacillus bacteria acting on sugar or starch.

  1. Lactic acid fermentation: inoculate a sugar solution (corn syrup, potato starch hydrolysate, or whey from dairy processing) with Lactobacillus culture (the same cultures used for lacto-fermentation of vegetables). Ferment at 40–45°C for 24–48 hours until pH drops below 4.5. The solution now contains significant lactic acid.
  2. Recovery: neutralise with calcium hydroxide (from lime production, Layer Zero Section X) to precipitate calcium lactate. Filter, wash, then acidify with sulphuric acid to release lactic acid and precipitate calcium sulphate. Filter again. Concentrate by evaporation.
  3. Polymerisation: lactic acid polymerises at elevated temperature (130–200°C) under reduced pressure or with a catalyst. This is the step that requires specialist equipment for commercial production — ring-opening polymerisation of lactide (the cyclic dimer of lactic acid) produces high-molecular-weight PLA suitable for 3D printing filament. Community-scale polymerisation produces lower-molecular-weight PLA adequate for coating, film, and some forming applications. The full chain to 3D printing filament requires equipment (a reactive extruder, molecular sieve drying) that represents a 15–20 year community infrastructure goal.
  4. The nearer-term community application: lactic acid itself (without full polymerisation) is a useful product — a preservative, a cleaning agent, a pH adjuster in fermentation, and a precursor for the PLA that can be purchased as filament now and eventually produced internally.
PHB — polyhydroxybutyrate from bacterial fermentation

PHB (polyhydroxybutyrate) is a thermoplastic polyester produced naturally by certain bacteria (Cupriavidus necator, formerly Ralstonia eutropha, and others) as an intracellular energy storage material. It is fully biodegradable, biocompatible, and can be produced from simple carbon sources including waste organic matter, agricultural residues, and even CO2 (by some phototrophic bacteria). It is the closest thing to a genuinely community-producible engineering plastic.

  1. Cultivate Cupriavidus necator (available from microbiology culture collections — ATCC, DSMZ). This bacterium grows readily on glucose, sucrose, or organic acids at 30°C under aerobic conditions.
  2. PHB accumulation is triggered by nitrogen limitation in the presence of excess carbon: grow bacteria to high density in a nutrient-complete medium, then switch to a nitrogen-deficient medium with excess glucose. PHB granules accumulate inside the cells — up to 80% of dry cell weight in optimised conditions.
  3. Extraction: disrupt the cells (sonication, bead milling, or chemical lysis with sodium hypochlorite), then extract PHB using organic solvents (chloroform or acetone) or a solvent-free method using sodium hypochlorite digestion of the non-PHB cell material. The remaining PHB can be filtered and dried.
  4. Forming: PHB is processable at 170–180°C (above its melting point of 170°C but below its thermal degradation temperature). It can be pressed, extruded, or moulded into simple forms. It is somewhat brittle compared to conventional plastics — blending with PHV (polyhydroxyvalerate, produced by feeding propionic acid instead of glucose) produces a tougher copolymer (PHBV).
  5. Community scale: PHB production at community scale producing several kilograms per month for specific applications (medical-grade biodegradable items, specific 3D printing applications) is a realistic 10–15 year goal as fermentation infrastructure matures. It is not a drop-in replacement for all plastics — it is a specific tool for specific applications.
Natural resins and historical polymers — immediately available
Pine rosin (colophony)The solid residue after turpentine distillation from pine resin. Widely available in NZ from pine forestry. A natural thermoplastic — melts above 70°C, sets rigid on cooling. Used for: violin bow rosin, flux in soldering (the rosin flux in standard solder is colophony), wood sealing, paper sizing, adhesive, and as a component in varnishes and coatings. Can be mixed with linseed oil to produce a flexible, waterproof coating. This is the simplest immediately-accessible natural polymer already in most communities.
ShellacSecretion of the lac insect (Kerria lacca), processed into flake shellac. A natural thermoplastic with excellent adhesive, coating, and sealing properties. Dissolves in alcohol, melts at 75–80°C. Used for: wood finishing, food-safe coating (E904 food additive), electrical insulation, stiffening fabric, and sealing containers. Not producible in NZ (tropical species) but importable and included because it was the primary plastic-equivalent before synthetic polymers existed. Worth stocking.
Beeswax-resin compositesBeeswax (from community hives) blended with pine rosin produces a workable, mouldable, waterproof composite that behaves somewhat like a thermoplastic. Historical name: pitch. Used for waterproofing wood and leather, sealing joins and fittings, making primitive tools and handles (the ancient Ötzi the Iceman carried tools with pitch-glued handles), and as a structural adhesive in historic composite bows and tools. The beeswax softens the rosin to prevent brittleness; the rosin stiffens the wax to prevent creep.
Tung oil and linseed oil polymersBoth tung oil and raw linseed oil polymerise (cure) by oxidation when exposed to air — a natural drying oil reaction that produces a solid, durable, flexible film. Fully polymerised (boiled) linseed oil is the basis of traditional oil paint and floor finish. With fillers (chalk, clay) it becomes a putty-like material. The polymerisation process connects directly to Layer Zero's chemistry — these are naturally occurring polymers requiring only the oil and time.
Plastic recycling and re-extrusion at community scale
  1. The Precious Plastic project (preciousplastic.com — download complete documentation to offline library) has designed and documented open-source machines for plastic collection, shredding, and re-forming: a shredder, an extruder, an injection moulder, and a compression press. All are buildable from standard steel and motor components using the machining skills described in Machine Commons (Document V). These machines allow collected plastic waste to be turned into new objects — sheet material, beams, tiles, and custom items — closing a waste loop without the energy-intensive pyrolysis step.
  2. Sorting is essential: only mix compatible plastics. HDPE (2) with HDPE, PP (5) with PP. Mixed plastics produce weak, inconsistent material. Build a community sorting habit before building a shredder.
  3. The most accessible community starting point: an HDPE shredder and a heated compression press. Shred HDPE milk bottles and containers, press between heated flat plates — the result is a solid, coloured sheet material usable for cutting boards, furniture components, and construction elements. Low tech, high value, immediately achievable.
· · ·
XVIII
Distillation Technology
The universal separation process — oils, alcohol, water, fuel, and solvent recovery
The still — principle, construction, and all applications
Skill 2$$ Med
"A still is not a drinking technology. It is a separation technology. The same instrument that produces medicine produces fuel, purifies water, extracts essential oils, and recovers solvents. It is one of the most versatile instruments the village can own."
The principle
Heat a liquid mixture. The component with the lowest boiling point vaporises first, rises, passes through a cooling coil, condenses back to liquid, and is collected separately from everything else. Different temperatures separate different substances. The thermometer at the top of the column is the instrument that tells you what you are collecting at any given moment.
Key boiling points — the operating map
56°CAcetone — solvent, cleaning agent, nail polish remover equivalent
64.7°CMethanol — fuel and industrial solvent (toxic — never consume)
78.4°CEthanol — medicinal alcohol, fuel, disinfectant
100°CWater — distilled water fraction; also carries steam-volatile essential oils
150–300°CHeavier hydrocarbons — diesel and kerosene range fractions from plastic pyrolysis or wood distillation
VariableEssential oils — steam-carried at 100°C regardless of their own boiling points
Building the still — copper pot design
  1. The boiler: a large copper or stainless steel pot with a tight-fitting lid. Copper is the traditional choice — antimicrobial, excellent heat conductor, and reacts with sulphur compounds to improve the quality of spirit output. A 20–40 litre pot serves a community operation well.
  2. The column: a copper or stainless pipe rising vertically from a hole in the lid. Height increases reflux — vapour that condenses in the column falls back into the pot and re-distils, increasing purity of the final output. A 30–60cm column is adequate for most community applications.
  3. The lyne arm: the column bends at the top and runs at a downward angle to the condensing coil. The angle and length affect the character of the output — longer lyne arms produce lighter, cleaner distillate.
  4. The condensing coil: 3–5 metres of copper tube coiled tightly and submerged in a vessel of cold water. Vapour enters the top of the coil and exits as liquid at the bottom. Keep the cooling water cold throughout the run — replace or circulate it continuously.
  5. Sealing: all joints must be airtight. Beeswax is the traditional sealant — food safe, effective, easy to apply and remove. Food-safe silicone works equally well. Never use lead solder on any surface that contacts vapour or distillate.
  6. The thermometer: mount at the top of the column or in the lyne arm. This single reading tells you precisely what fraction you are collecting. It is not optional for precision work.
  7. Heat source: anything controllable. The key is consistent, gentle heat — not fierce boiling. A rocket stove with a controllable damper, a gas burner on low, or a purpose-built electric element. Steady heat produces steady output and better separation.
Application guide
Medicinal spirits (65–75% ABV)Fermented grain or fruit wash distilled twice. First run (stripping) collects all alcohol quickly. Second run (spirit run) makes precise cuts: discard foreshots (first 50ml/20L — methanol-rich), collect hearts (clean, smooth — this is your medicine base), set aside tails (heavier, oily character). The hearts fraction at 65–75% ABV extracts the widest range of medicinal plant compounds and is effective as a disinfectant and wound cleaner.
Essential oils (steam distillation)Suspend plant material above water in a perforated basket inside the pot. Steam carries aromatic volatile compounds through the system. Collect distillate — essential oil floats above the hydrosol (aromatic water). Both fractions are medicinal. NZ mānuka and kānuka oils produced this way have genuine commercial and community medical value.
Fuel ethanol (85–95% ABV)Higher-gravity fermented wash from sugar beet, kūmara, grain, or fruit. Distil to the azeotrope limit (95.6% — beyond this requires molecular sieves). Denature with methanol or petrol for legal fuel use in NZ. Burns cleanly in modified petrol engines, alcohol stoves, and lamps.
Distilled waterFill pot with any contaminated source water. Collect distillate at 100°C — pure water, all contaminants remain in the pot. Re-mineralise with a pinch of sea salt before regular drinking use. Energy-intensive but removes everything other methods may miss: heavy metals, nitrates, pesticides, all biological contamination.
Solvent recoveryHerbal extraction solvents (ethanol, isopropyl alcohol) can be recovered after tincture-making for reuse. Run the spent solvent through the still and collect the solvent fraction — reducing the cost and dependency of continued herbal medicine production significantly.
HydrosolsThe aromatic water fraction from essential oil steam distillation. Mānuka hydrosol: gentle wound rinse, skin toner. Lavender hydrosol: calming, safe for direct skin application without dilution. Rose geranium hydrosol: skin care, insect deterrent. Every steam distillation run produces both oil and hydrosol — use both.
Non-negotiable safety
  • Pressure gauge and free outlet — the most critical requirement: Every distillation system must have a pressure gauge on the vapour line between the pot and the condenser, and the collection vessel outlet must always be open to atmosphere. This is the failure mode that injures people — vapour condenses in a closed collection vessel, pressure builds silently, and when the vessel is opened or fails, pressurised flammable liquid releases violently and ignites. This has seriously injured people building exactly these systems. A pressure gauge tells you before you open anything whether pressure is present. The collection vessel outlet must vent freely at all times — never seal it, never allow it to become blocked. If pressure reads above zero on the gauge before you open any fitting, stop, allow the system to cool completely, and find and clear the blockage before proceeding.
  • Alcohol vapour is flammable — eliminate open flames when running alcoholic washes. Use electric heating or gas burners positioned entirely away from any vapour path and collection vessel.
  • Never seal the still outlet — pressure must always escape freely. A blocked condenser exit causes catastrophic pressure buildup.
  • Foreshots always contain methanol and must always be discarded from every alcohol distillation run. The quantity is small (roughly 50ml per 20L of wash) but the toxicity is real — methanol causes blindness and liver failure. Clearly label and safely dispose of every foreshots collection.
  • Lead solder: never on any surface contacting vapour or liquid. Lead dissolves into distillate. Use only copper, brass with food-safe solder, or stainless steel throughout.
  • NZ law: distilling spirits for consumption requires a licence. Distilling for fuel, essential oils, water purification, and non-consumable solvents operates differently. Know your use and its legal context. Community Law Waikato can advise.
Connections to other Layer Zero sections
  • Yeast for fermented wash → Section III
  • Wood distillation (methanol production) uses the same retort-and-condenser principle → Section V
  • Plastic pyrolysis uses the same condensing principle → Section XVII
  • Essential oils feed directly into herbal medicine preparations described in The Practical Guide Section V
  • Fuel ethanol feeds into the energy systems described in The Practical Guide Section IV
· · ·
XVIII
Plastic Pyrolysis — Waste to Fuel
Turning the most persistent waste stream into diesel-equivalent fuel
The plastic problem and the pyrolysis solution
Skill 3$$ Med
The principle
Plastic is polymerised petroleum. Pyrolysis — heating in the absence of oxygen — depolymerises it back into shorter hydrocarbon chains: a diesel-equivalent liquid fuel, combustible gases, and carbon char. This is the original petroleum refining process run in reverse. A community operating a pyrolysis unit is simultaneously cleaning its local environment of persistent plastic waste and producing fuel. The waste stream becomes the resource.
NZ context: Aotearoa generates approximately 735,000 tonnes of plastic waste annually. Recycling infrastructure handles a fraction. The rest goes to landfill or escapes to waterways and ocean. A community pyrolysis operation removes plastic from the environment permanently while producing a useful fuel — the environmental case is as strong as the energy case.
Plastic suitability — sort before every run
Best — 60–80% oil yieldHDPE #2 (milk bottles, containers), LDPE #4 (plastic bags, film), PP #5 (yoghurt pots, bottle caps), PS #6 (foam packaging, cups). These are the most common household plastics and produce the cleanest, highest-volume fuel output.
Avoid entirely — toxic outputsPVC #3 (clear flexible packaging, some pipes) produces hydrochloric acid gas and chlorinated compounds that poison the reactor, contaminate the fuel, and harm the operator. Identify PVC by burning test: green flame edge and strong pool-chemical smell. Remove every piece before running.
Low value — PET #1Drink bottles. Low oil yield, produces acetic acid vapour that corrodes equipment. Not worth including — sort out and find other disposal or genuine recycling pathway.
Unknown or mixedIf sorting is impractical, run mixed streams at lower temperature (300–380°C) and expect lower yield and more varied fuel quality. Always exclude PVC regardless.
Equipment — the pyrolysis retort
Retort vesselHeavy-gauge steel drum or fabricated pipe reactor. Must withstand sustained 400–450°C without warping. Completely sealed except for the single vapour outlet. The same design logic as the wood distillation retort in Section V — if you have one, you have the other.
Condensing systemIdentical to wood and alcohol distillation: vapour pipe from the retort outlet through a water-cooled coil into a collection vessel. Longer coil and colder water produce better condensation and less vapour escaping uncondensed. A two-stage condenser (primary coil in cold water, secondary coil in ice water) maximises liquid recovery.
Non-condensable gas managementGases that do not condense (methane, ethylene, propylene) exit the condenser. These are combustible. Option A: burn off at a flare point at least 5m from the reactor. Option B: collect in a gas bag and feed back to the burner heating the retort — a self-fuelling loop once running. Option B is more efficient; Option A is simpler and safer while learning.
External heat sourceThe retort is heated from outside — the plastic inside must not combust, only pyrolyse. A dedicated burner or forge. Once running, the non-condensable gases from the retort can supplement the heat source, reducing external fuel needed.
PPEOrganic vapour respirator (not just a dust mask), heat-resistant gloves, full face shield. Work outdoors or in a fully ventilated enclosure. Pyrolysis vapours contain a complex mix of hydrocarbons, some acutely toxic.
Fuel collection and settlingStainless steel or glass collection vessel. The plastic oil as collected is typically yellow-brown, diesel-smelling. Allow 24 hours to settle — water and sediment sink, clean oil floats. Decant carefully. Store in sealed containers away from heat and ignition sources.
Build steps — the full run
  1. Sort and clean incoming plastic thoroughly. Remove all food residue — contamination creates additional toxic outputs and reduces oil quality. Sort out every piece of PVC. Shred or cut plastic to increase packing density and reduce run time.
  2. Fill the retort 60–70% with sorted, shredded plastic. Seal completely except for the vapour outlet pipe. Connect the outlet to the condensing coil. Point the coil exit toward the flare or gas collection system.
  3. Submerge the condensing coil in cold water. Have a continuous supply of cold water available — the cooling load is significant during peak vapour production.
  4. Begin heating slowly. At 100–200°C: moisture and very light volatiles exit first. Collect this initial fraction separately and discard — it is mostly water and trace aromatics.
  5. Continue heating to 300–380°C for HDPE/LDPE/PP. PS pyrolyses at slightly lower temperatures. Hold temperature in this range for the main production phase. Condensate flowing from the coil should be a clear to pale yellow oil.
  6. Peak vapour production typically lasts 45–90 minutes depending on batch size. Monitor the condensate flow — when it slows significantly and the retort temperature climbs without producing more vapour, the run is complete.
  7. Reduce heat and allow the retort to cool completely — minimum 2 hours, often overnight for large batches. Do not open under any circumstances while hot. The carbon char residue inside can re-ignite violently on contact with air if the retort is still above 200°C.
  8. Open retort when fully cool. Remove char residue — this is carbon black, useful as a pigment, a soil amendment (charge before use, as with biochar), or as a component of ink and paint.
  9. Settle the collected plastic oil for 24 hours. Decant the clean upper fraction. Test before engine use: specific gravity similar to diesel (0.82–0.88), clean petroleum smell, burns with a clear yellow-orange flame with minimal soot.
  10. Blend at 30–50% with conventional diesel for initial engine trials. Many engines run well on 100% plastic oil; some require minor fuel system adjustment. Test conservatively and increase proportion based on performance.
Critical hazards — this process requires full respect
  • Pressure gauge and collection vessel — the injury that prompted this warning: Julian Brown (naturejab.com), who has documented practical off-grid systems including plastic pyrolysis, was seriously burned when he went to collect the fuel from his collection vessel. The system had no pressure gauge. Vapour had accumulated under pressure in the collection vessel — when he opened it, pressurised petrol-equivalent liquid released explosively and ignited. He survived. The burns were worst on his feet — he was barefoot, and the hydrocarbon vapour had pooled at floor level before ignition, which is exactly what heavier-than-air vapours do. He is documented proof of two simultaneous requirements: a pressure gauge on every closed distillation and collection system, and correct PPE including footwear whenever operating any system handling flammable vapour. Install a pressure gauge on the vapour line between the retort outlet and the condenser, and a second gauge on the collection vessel. The collection vessel outlet must vent freely to atmosphere at all times through a vent directed away from the operator and away from ignition sources. Read zero on both gauges before touching any fitting. There is no shortcut here worth taking.
  • Vapour leaks before the condensing coil are simultaneously a fire hazard and a respiratory hazard — test every joint with soapy water before every run. Bubbles mean leaks. Fix leaks before heating.
  • Never open the retort while hot or under any residual pressure. Cool completely and confirm zero pressure on the gauge before opening any fitting.
  • Non-condensable gas accumulation: include a water-seal bubbler or calibrated pressure relief valve on the system downstream of the condenser. This ensures gas vents safely at a known low pressure rather than building silently. The relief valve and the pressure gauge work together — the gauge tells you the system state, the relief valve protects against the gauge being wrong or unread.
  • PVC contamination: a single contaminated batch produces hydrochloric acid that corrodes the entire reactor internally and renders the fuel toxic. Sort every batch, every time, without exception.
  • Hydrocarbon vapours are heavier than air and pool at ground level — they migrate silently toward ignition sources at floor level. No open flames, no spark-producing equipment, no running engines within 5 metres of the collection area.
  • Char removal: fresh char from a plastic run may contain residual hydrocarbons. Handle in a ventilated space, wear gloves. Allow to fully cool and outgas before storing or using as soil amendment.
  • Long-term health: repeated exposure to pyrolysis vapours carries cumulative health risk. The organic vapour respirator is not optional. Rotate operators if running frequent batches.
Integration with other systems
  • The retort design is identical in principle to wood distillation (Section V) — one piece of infrastructure serves both processes
  • Carbon char output can be charged and used as biochar (Section VI) — closing the residue loop
  • Non-condensable gases can feed the biogas system (Practical Guide Section IV) or be burned directly to heat the retort — reducing external fuel consumption toward zero once the system is running
  • Plastic oil blended with community biodiesel reduces the total volume of biodiesel needed from the vegetable oil process
  • The still design (Section XVI) uses the same condensing coil principle — a community that builds one has the knowledge to build both
✦

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thecodex.co.nz

I — Foundations · The declaration · Start here
II — The Practical Guide · Food, water, energy, medicine, knowledge
III — Layer Zero · This document · Prerequisites · Hemp, glass, lye, methanol, smithing, building
IV — Living Systems · Animals, fermentation, dairy, bees, salt, preservation
V — The Machine Commons · Electricity, electronics, machining, welding, code, steam, computing
VI — Community Life · Emergency medicine, governance, education, textiles, weather, security

Written in Aotearoa New Zealand, 2026. The microcosm mapping onto the macrocosm.