The raw ingredients of The Soap Cottage soaps are fats (natural vegetable oils) and lye. Saponification is a process that transforms these raw ingredients into real soap. It’s important to note that the finished product does not contain any lye. Lye is simply an agent to transform the fats into soap. For the technically minded, saponification involves base (usually caustic soda NaOH) hydrolysis of triglycerides, which are esters of fatty acids, to form the sodium salt of a carboxylate. In our soaps the glycerol that is produced by the saponification process is kept in the soap which contributes to their great qualities.

1. Wikipedia – Saponification