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Soap is made through a process called saponification: boiling oils or fats with an alkali, which produces the soap and glycerine. Manufacturers used animal waste (such as the fat, bones, or hooves) or vegetable oils and some form of lye (ashes, potash, caustic soda) to create soap.

Soap 1568

Soap Hard 1742

Soap and Soap Powder 911

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