Wikipedia
Glycerin soap
Glycerin soaps are soaps that contain glycerin, a component of fat or oil. They are recognizably different from other soaps because they are translucent. 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.
Usage examples of "glycerin soap".
He went into the bathroom and washed his hands with a clear bar of glycerin soap—.