# Sovereignty Module: Burn the Stone

## Complete Lime Production and Whitewash: From Limestone to Plaster

Lime is one of the most versatile materials in human history. This campaign covers lime burning, slaking, mortar making, whitewash, and agricultural applications.

### Chapter 1: Limestone and Lime Types

| Material | Chemical Formula | Source | Use |
|---|---|---|---|
| Limestone (raw) | CaCO3 | Quarried or collected | Raw material |
| Quicklime (burned) | CaO | Limestone heated to 1,650°F+ | Mortar, plaster, agriculture |
| Slaked lime (hydrated) | Ca(OH)2 | Quicklime + water | Mortar, whitewash, soil amendment |
| Lime putty | Ca(OH)2 + water | Slaked lime aged in water | Premium mortar, fine plaster |
| Hydraulic lime | Ca(OH)2 + silicates | Impure limestone burned | Sets underwater, stronger mortar |

### Chapter 2: Lime Burning

| Kiln Type | Capacity | Fuel | Temperature | Time | Difficulty |
|---|---|---|---|---|---|
| Pit kiln (clamp) | 100-500 lbs | Wood | 1,650-2,000°F | 24-72 hours | Low-moderate |
| Flare kiln | 500-2,000 lbs | Wood | 1,650-2,000°F | 24-48 hours | Moderate |
| Draw kiln (continuous) | Continuous | Wood, coal | 1,650-2,000°F | Continuous | High |

Pit kiln method: 1) Dig pit 3-4 feet deep, 4-6 feet diameter. 2) Line bottom with fire grate (stones or metal bars). 3) Stack limestone pieces above grate (fist-sized, loosely stacked). 4) Leave air channels between stones. 5) Build fire below grate. 6) Maintain fire for 24-72 hours (temperature must exceed 1,650°F). 7) Limestone changes from gray to white as it burns. 8) Burned lime is lighter in weight (lost CO2). 9) Test: burned lime crumbles easily and reacts vigorously with water. 10) Let cool completely before handling. 11) Store quicklime in airtight container (absorbs moisture from air). 12) Caution: quicklime is caustic; wear eye protection and gloves.

### Chapter 3: Slaking

Slaking process: 1) Place quicklime in metal or stone container (not plastic). 2) Add water slowly (quicklime reacts violently with water). 3) Reaction produces intense heat (can boil water). 4) Steam and spattering are dangerous (wear full protection). 5) Add water until lime is fully hydrated (thick paste). 6) Stir thoroughly. 7) Result: lime putty (calcium hydroxide paste). 8) For dry hydrated lime: add less water, let dry to powder. 9) Lime putty improves with age (store under water for weeks to months). 10) Aged lime putty makes the finest plaster and mortar.

| Slaking Method | Water Ratio | Result | Use |
|---|---|---|---|
| Dry slaking | Minimum water | Dry powder (hydrated lime) | Mortar, agriculture |
| Wet slaking | Excess water | Lime putty (paste) | Fine plaster, whitewash |
| Hot slaking | Moderate water | Hot paste | Immediate mortar use |

### Chapter 4: Applications

| Application | Recipe | Use | Properties |
|---|---|---|---|
| Lime mortar | 1 lime putty : 3 sand | Masonry joints | Flexible, breathable, self-healing |
| Lime plaster | 1 lime putty : 2-3 sand | Wall coating | Breathable, antimicrobial |
| Whitewash | Lime putty + water (thin) | Paint/coating | Antimicrobial, reflective, cheap |
| Limewash | Hydrated lime + water | Exterior paint | Weather-resistant, traditional |
| Soil amendment | Hydrated lime or ag lime | Raise soil pH | Corrects acidic soil |
| Water treatment | Hydrated lime | Purify water | Raises pH, precipitates contaminants |
| Tanning | Hydrated lime + water | Remove hair from hides | Alkaline bath loosens hair |
| Nixtamalization | Hydrated lime + water | Process corn | Releases niacin, improves nutrition |

Whitewash recipe: 1) Mix hydrated lime with water to milk-like consistency. 2) Optional: add salt (1 cup per gallon) for durability. 3) Optional: add flour paste (1/2 cup per gallon) for adhesion. 4) Apply with brush to clean, damp surface. 5) Apply thin coats (thick coats crack and peel). 6) Multiple thin coats build up coverage. 7) Whitewash is antimicrobial (lime kills bacteria and mold). 8) Reapply annually for best appearance.

### Chapter 5: Safety

| Hazard | Source | Protection | First Aid |
|---|---|---|---|
| Chemical burns | Quicklime, slaking | Gloves, goggles, long sleeves | Flush with water 15+ minutes |
| Eye damage | Lime dust, splashing | Safety goggles (sealed) | Flush with water, seek medical help |
| Heat burns | Slaking reaction | Stand back, add water slowly | Cool burn, seek medical help |
| Respiratory | Lime dust | Dust mask or respirator | Move to fresh air |
| Skin irritation | Wet lime (mortar, plaster) | Gloves, barrier cream | Wash thoroughly |

### Reference Card

1. Limestone plus heat equals quicklime (heating limestone above 1,650°F drives off carbon dioxide, leaving calcium oxide; this is the fundamental reaction of lime production). 2. Quicklime plus water equals slaked lime (adding water to quicklime produces a violent, exothermic reaction; the result is calcium hydroxide, which is the working form of lime). 3. Slaking is dangerous (the reaction with water produces extreme heat and spattering; always add water to lime slowly, wearing full protective equipment). 4. Lime putty improves with age (aged lime putty makes smoother, stronger plaster and mortar; store under water for months if possible). 5. Whitewash is antimicrobial (lime-based whitewash kills bacteria and mold on contact; this is why barns, dairies, and hospitals were traditionally whitewashed). 6. Lime mortar breathes (unlike cement mortar, lime mortar allows moisture to pass through; this prevents trapped moisture from damaging stone and brick). 7. Lime corrects acidic soil (agricultural lime raises soil pH, making nutrients available to plants; test soil pH before applying). 8. Lime is one of humanity's oldest materials (lime plaster, mortar, and whitewash have been used for over 10,000 years; it remains one of the most useful materials you can produce).