Cold process soap making lets you customize everything. By combining oils and sodium hydroxide lye, a chemical process called saponification occurs. Note that lye is very corrosive and must be handled with care. Wear gloves, goggles, long sleeves and open-toed shoes while working with lye. Use a lye calculator when formulating recipes. Equipment needed for cold process includes containers, silicone spatulas and spoons, an immersion blender, and a scale. You’ll also need soap molds, which come in wood, silicone or plastic.
- After making soap, a curing stage of 4 to 6 weeks is recommended.
- When handling lye, wear goggles, gloves, long sleeves and closed-toed shoes.
- Necessary equipment includes a stick blender, scale and soap molds.
“This is the point when the oils and lye water are emulsified. At thin trace, there will be no streaks of oil and the soap will be the consistency of thin cake batter. As the soap sits, it will continue to thicken to medium and thick trace. This video has more information and examples of each stage.”