Handmade soap can be divided into four categories

Cold soap

Cold processed soap is the Chinese term for cold processsoap. Cold processing is relative to the hot-melt method used in industrial soap production. After mixing oil and sodium hydroxide solution, saponification reaction occurs. Except for the need to heat and dissolve the solid oil into liquid before mixing, there is no need for high-temperature heating during the soap making process. After the reaction is complete, the soap solution is poured into the mold and allowed to dry naturally. After three to five weeks, it can be removed from the mold and used directly. Due to the fact that cold soap does not require high temperature heating during the soap making process, it can reduce the loss of natural vitamins and nutrients.

Hot soap

Soap made by hot processing is rapidly saponified by intermittent heating during the saponification reaction between oil and sodium hydroxide until it reaches a thick state. After demolding, let it stand for one week to evaporate the water, and it can be used.

Regenerated soap

Regenerated soap, also known as ground soap, is the reprocessing and optimization of cold soap. Grind the cold soap after demolding into strands, add additives (such as milk, flower tea, etc.), heat to turn the soap strands from solid to liquid, and then re solidify to obtain ground soap. Grinding soap is very suitable for making soap that adds other nutrients in the later stage. Because the substances added later, such as delicate oils or other nutritional skincare substances, will not be destroyed by strong alkalis. If you are not satisfied with the solidified soap body, it can be remade by grinding and then heating.

Melt and remake soap

It is made of pure soap base purchased in the market, heated to melt it, added pigment and essence, and molded. The process of melting and remanufacturing is relatively simple and suitable for teaching handmade soap. However, transparent soap base contains chemicals that cause soap to melt repeatedly, and glycerol, a byproduct of the soap base production process, has also been removed. Therefore, soap produced by melting and reprocessing is less natural.