Lye: (also NAOH, Natrium Hydroxide, Sodium Hydroxide). All soap is made with lye (except black soap). Any skin or hair cleansing product made without sodium hydroxide is not soap, it is detergent. The chemical reaction of making soap, called saponification, is complete, the lye and oil molecules have combined and chemically changed into soap and glycerin. If the soap is made properly, the lye is used up in the saponification process to turn oil into soap.
There is no lye present in the finished bars of soap or shampoo. While all real soap must be made with lye, no lye remains in our finished product after saponification
25 August 2020