1. Dissolve caustic soda with water, put water and caustic soda into a container, and stir until the water becomes transparent. It should be noted that foam and heat will be generated during the mixing process.
2. Add oil while stirring. After the caustic soda is completely dissolved, the oil is gradually added while stirring. Stir with a blender for about 10 minute.
3. Inject into the mold, stop stirring, and inject into the mold after two or three minutes.
4. Leave it intact 1~2 days, and put it in a warm place 1~2 days. At this time, the liquid produces a chemical reaction in the mold. Please don't touch it.
5, finally completed, cut into squares of appropriate size, placed in a ventilated place to avoid direct sunlight, placed for more than a month, the production is completed.
I hope my answer will satisfy you.