Tallow Soaps Are Made by Mixing Animal Fat with Sodium Hydroxide, More Commonly Known as Lye. Lye Is Highly Corrosive, but When It Mixes with Tallow It...
Tallow soaps are made by mixing animal fat with sodium hydroxide, more commonly known as lye. Lye is highly corrosive, but when it mixes with tallow it undergoes a reaction called saponification .
Does soap have animal fat?
Many bar soaps contain animal fat derivatives as their primary ingredients. Don't expect soap companies to be forthcoming about their use of animal fats. Bars of Ivory Soap, for instance, carry the phrase “99.44% pure” on its label. Yet the stuff is largely made from rendered animal fat obtained from slaughterhouses.
Soaps like Dove are all tallow with oil added to them to reduce the drying effect that soaps have on the skin. Animal fats are not essential to the soap-making process.