Hot Process Soap

Learning Objectives:

1. Differentiate between cold and hot process soap methods.
2. Execute the hot process technique using a slow cooker.
3. Troubleshoot common issues during cooking.

Detailed Content:

1. Cold Process vs. Hot Process
   • Process:
     • Cold Process (CP): No external heat; saponification occurs during curing.
     • Hot Process (HP): Cooked (e.g., slow cooker) to accelerate saponification.
   • Texture: HP has a rustic, chunky texture vs. CP’s smooth finish.
   • Curing Time: HP is ready in 1–2 weeks; CP requires 4–6 weeks.
   • Best For: HP suits additives like herbs or exfoliants (won’t sink).
2. Step-by-Step Hot Process Tutorial
   • Prep:
     • Use a dedicated slow cooker (not for food).
     • Follow a basic CP recipe (oils + lye solution).
   • Cooking:

1. • 1. Mix to trace, then cook on low for 1–2 hours (stirring occasionally).
     2. Monitor for “vaseline-like” consistency (fully saponified).

1. • Additives: Stir in fragrances, clays, or oats after cooking.
   • Molding: Press into molds immediately (hardens quickly).
2. Common Issues & Fixes
   • Overheating: Soap bubbles over → reduce heat.
   • Dry Texture: Add a splash of water or milk during cook.
   • Lye Pockets: Ensure thorough mixing before molding.
3. Assignment: Create a Hot Process Soap Loaf
   • Recipe: 500g oils (40% olive, 30% coconut, 20% palm, 10% castor), 5% superfat.
   • Submission: Photos of cooked soap, molded loaf, and notes on texture/scent.