Calculate Lye and Water
30 minutesUse soap calculator for precise NaOH or KOH amounts.
Intermediate2 weeks
Soap Recipe Formulation Guide
Complete guide for soap recipe formulation — step-by-step workflow, tools, checklist, and expert tips to get started.
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Workflow
Weigh Oils and Mix
45 minutesCalculate oil blend to match target INS range.
Mix to Trace and Pour
1 hourMonitor trace thickness before additives.
Cut and Cure Bars
1 hourpH test before use — target pH 8–10.
Tools Used
Checklist
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Planning
Prep
Baseline
Quality
Tracking
Safety
Reference Materials
Oil PropertiesTable
Common soap oils.
| Oil | Lauric | INS | Notes |
|---|---|---|---|
| Olive | Low | 109 | Mild |
| Coconut | High | 258 | Bubbles |
| Palm | Medium | 145 | Hard bar |
Sap ValueFormula
Lye (g) = (oil weight × SAP) ÷ purity factor.
pH SafetyStandard
Finished soap pH 8–10 — never use if pH above 11 or lye pockets visible.
Measure Twice
Verify all calculator inputs against physical measurements before cutting or mixing.
Quality Check
Compare results to known good references in soap before final assembly.
Stop If Unsafe
Pause immediately if tools malfunction, ventilation fails, or materials react unexpectedly.
Safety Notes
- Lye causes severe chemical burns — full PPE mandatory.
- Keep vinegar away — does not neutralize lye burns; use water flush.