Glycerin soaps are soaps that contain glycerin, a component of fat or oil. It is recognizably different from other soaps because it is transparent. The clarity is due to the alignment of the soap molecules, which can be induced through the addition of alcohol and sugar. This is usually done for homemade glycerin soaps that are not remeltable.
The process for making glycerin soaps was well known as of 1857 in the Western world. In modern industrial soap-making, the glycerin is usually separated from the soap to be resold and used in a wide variety of areas such as for personal care products, pharmaceuticals, chemical intermediates, and food processing.
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- Grosso, Alicia (2007), The Everything Soapmaking Book: Recipes and Techniques for Creating Colorful and Fragrant Soaps (2 ed.), Adams Media, ISBN 1-59869-229-1
- Piesse, G. W. Septimus (1857), The Art of Perfumery And Methods of Obtaining the Odors of Plants, PHILADELPHIA: C. SHERMAN & SON