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Cold process soap making

The cold process soap-making technique is known for thousands of years. The name soap comes from Latin sapo, and the chemical reaction of soap making is called saponification.  Saponification is a reaction between hot alkali solution, usually sodium hydroxide, and fatty acids from oils or natural fats resulting in fatty acid salts and by-product glycerin. Glycerin is a non-toxic, natural humectant that keeps the skin hydrated and soft.  Cold process soap making does not use any additional external heating to speed up the saponification, unlike the hot process. The saponification in CP usually occurs within the first 48h. The reason why cold process soaps have a curing time of at least several weeks is that water evaporates from the soap making it harder,...

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