Use a mixing bowl to weigh all oils and fats. I prefer a stainless steel bowl because later we will add the lye water into it.
You may need to melt some solid oils. Please use a warm water bath instead of heating directly on a hob.
A PP (polypropylene) container also works, and it can even be microwaved to help melt oils, which is convenient.
Do not use glass containers, as caustic soda can damage them.
2. Prepare the lye water
Gear up with goggles and gloves !
In a stainless steel pot, measure the required amount of water according to your recipe.
Go to a well-ventilated place, such as near an open window or on a balcony. Weigh the caustic soda, then slowly add it into the pot of water (never the other way around).
It is normal to see fumes and heat being released. Hold your breath briefly if needed and stir until the caustic soda is fully dissolved. Now the lye water is ready. The pot will become hot, which is expected.
3. Mix oils and lye water
Carefully pour the lye water into the oil bowl, and use a stick blender to mix.
At this step, observe the consistency of the mixture. As it thickens, we call this stage “trace”
Once it reaches a light trace, it’s a good time to add additives such as essential oils for fragrance.
4. Pour into the mold
Pour the mixture into a soap mold and cover it with a blanket or towel to keep it warm.
During this stage, the chemical reaction (saponification) continues, releasing heat.
Leave it undisturbed for 24 hours.
5. Cure the soap
After 24 hours, check if the soap is firm enough to cut.
However, saponification is not fully complete yet. For safety and best results, leave your soap to cure for 4~6 weeks before use.
This website uses cookies to ensure you get the best experience.
