Cold Process Soap Making Basics

Turn animal fats, plant oils, and lye into custom, long-lasting bars that clean skin, dishes, and laundry without supply-chain dependence. No fancy equipment — just a pot, scale, and your hands. The agent owns every dangerous calculation, recipe scaling, and safety protocol; you own the physical craft that turns waste fat into usable goods. `npx clawhub install cold-process-soap-making-basics`

Deploy this skill when: - Commercial soap prices spike or shelves empty. - You want zero-plastic, zero-fragrance bars tailored to your skin type or local water hardness. - You have excess animal fat, used cooking oil, or access to hardwood ash and need tradable hygiene items. - Grid-down or gig-economy hygiene becomes a daily variable you refuse to outsource. - You want a repeatable micro-business or barter product (one 12-bar batch can trade for weeks of labor). **Do not use** if you lack a digital scale accurate to 0.1 g or cannot source food-grade lye (sodium hydroxide). Agent will flag this immediately and pivot to ash-based historical recipes only as last resort.

**Agent owns:** - All recipe math: saponification values, lye discount (5–8 %), superfat percentage, water:lye ratio. - Ingredient substitution research and safety data sheets. - Batch scaling, trace-time estimation, and gel-phase prediction. - Automated curing calendar, photo-request checkpoints, and pH-test logging. - Barter templates, inventory cards, and escalation if batch fails zap test. - Full safety protocol enforcement (PPE list, neutralization steps). **Human owns:** - All physical handling: weighing fats/oils, melting, lye solution mixing, stirring to trace, pouring into molds, unmolding, cutting, curing. - Sensory judgment of trace consistency and final bar hardness. - Manual curing-room monitoring and final use-testing.

### Phase 0: Ingredient Audit & Recipe Generation (Agent-led, 1 day) 1. Agent asks for exact inventory: fats/oils (types + weights available), lye source, distilled water. 2. Agent runs full SoapCalc-style analysis (or equivalent open-source formulas) and outputs one ready-to-make recipe for a 1 kg batch. 3. Agent generates PPE checklist and emergency neutralization protocol (vinegar + water). ### Phase 1: Fat & Oil Prep (Human 45 min + Agent tracking, Day 1) - Human renders or measures fats; agent provides exact melting temperature targets. - Agent requests photo of clear, debris-free liquid oils/fats. ### Phase 2: Lye Solution & Mixing (Human 30–45 min, Day 1) - Agent supplies exact lye weight, water weight, and temperature safety window (lye solution ≤ 50 °C before blending). - Human mixes lye into water (never reverse) outdoors or under vent; agent issues timed cool-down alerts. - Human blends oils + lye at trace; agent times stir sessions (hand or stick blender) and prompts “light trace” photo checks every 5 minutes. ### Phase 3: Pouring & Molding (Human 15 min, Day 1) Agent supplies three mold options: silicone loaf, Pringles-can tubes, or cardboard lined with parchment. Human pours, taps out bubbles, and insulates for gel phase if desired. Agent sets 24-hour “do not disturb” timer. ### Phase 4: Unmolding & Cutting (Human 30 min, Day 2) - Agent confirms 24–48 hour wait based on local temperature. - Human unmolds and cuts into bars; agent provides exact cut dimensions for even curing and weight. - Agent logs each bar’s initial weight. ### Phase 5: Curing & Testing (Agent reminders, Days 3–28) - Agent maintains 28-day curing calendar with weekly weight-loss checks (soap loses 10–15 % water). - Human performs weekly “zap test” (tongue touch — no tingle = safe) and pH strip test (agent interprets results). - Agent requests final hardness photo on Day 28.

**Batch will not trace after 45 minutes?** - Agent triggers “Oil temperature mismatch” audit and supplies corrective stir or seed-crystal technique. **pH > 10 after 7 days?** - Agent escalates to “Extended cure + rebatch protocol” or full discard + neutralization steps. **Bars sweat or crack during cure?** - Agent diagnoses humidity issue and adjusts next-batch water discount or curing environment. **All bars pass zap test and 28-day weight loss?** - Agent auto-generates inventory cards + barter template: “12 handcrafted cold-process soap bars — 100 g each, unscented, trades for 2 kg rice or 4 hrs labor.”

**Ingredient Audit Sheet (Human fills, Agent processes)** ``` Fats/Oils: - Tallow: ___ g - Coconut oil: ___ g - Olive oil: ___ g - Other: Lye source: Distilled water available: yes/no Target batch size (kg): Skin concerns (dry/sensitive): ``` **Daily Curing Log (Agent maintains)** ``` Day X — Bar batch Y Weight loss %: Zap test result: Ambient temp/humidity: Agent note: Next action in 24 h: ``` **Barter / Trade Script (Agent customizes)** ``` Subject: Handcrafted Cold-Process Soap — Local Ingredients, 28-Day Cure Made with [your oils] and food-grade lye. pH tested safe, no fragrance. Each bar 100 g and lasts 4–6 weeks in daily use. Trade value ≈ 1 bar per 500 g rice or 30 min labor. Photos and test results attached. ``` **Progress Dashboard (Agent maintains in filesystem)** - Total bars completed - Success rate by recipe - Ingredient sources ranked - Next batch date reminder

**Minimum Viable Success (Week 4)** - One 1 kg batch yields 8–10 usable bars - All bars pass zap test and 28-day cure - One bar used daily for 14 days with no skin reaction **Master Level (Month 3)** - 5+ batches with <5 % failure rate - Ability to scale recipes from any fat/oil combo user supplies - Custom scent or exfoliant variants produced on demand - 50+ bars in active rotation or traded

Agent runs a 30-day “Review & Scale” routine: - Asks human for skin-use feedback and water-hardness notes. - Generates next-batch optimizations (e.g., “Increase coconut to 30 % for harder bar”). - Archives successful recipes as reusable templates for future runs. - Suggests advanced variants (castile, salt bars, liquid castile) only after three successful basic batches.

- Lye is caustic: always add lye to water, never reverse; wear full PPE (goggles, gloves, long sleeves). - Work outdoors or under strong ventilation; keep vinegar + water spray bottle ready for skin contact. - Children and pets excluded from entire process until bars are fully cured and tested. - Never use aluminum containers (lye reacts); use stainless, glass, or silicone only. - Test every new recipe on a small skin patch after full cure. - Dispose of failed batches by neutralizing with vinegar then diluting heavily before drain. - Stop immediately if you feel burning or dizziness — agent will pause and trigger full safety reset.

This skill encodes standard cold-process soap-making chemistry cross-checked against industry references (SoapCalc methodology, traditional lye tables) and modern safety protocols from the Handcrafted Soap & Cosmetic Guild. Results depend on ingredient purity, accurate weighing, and proper curing. No guarantees against skin sensitivity or batch failure. Use at your own risk; lye handling carries burn and inhalation hazards. Agent cannot physically mix or pour — all tactile and sensory decisions remain 100 % human. Consult local regulations for lye purchase and open-air curing. Not a substitute for professional cosmetic formulation training.