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shaving cream
Shaving cream or shaving foam is cream applied to the face, or wherever else hair grows, to facilitate shaving. The use of cream achieves three effects: lubricates the cutting process; swells keratin; and desensitizes skin. Shaving creams commonly consist of an emulsion of oils, soaps or surfactants, and water.〔Thomas Clausen et al. "Hair Preparations," Ullmann’s Encyclopedia of Industrial Chemistry. Wiley-VCH, Weinheim (2006). 〕
==History==
A rudimentary form of shaving cream was documented in Sumer around . This substance combined wood alkali and animal fat and was applied to a beard as a shaving preparation.〔("History of Shaving" at Gillette )〕
Until the early 20th century, bars or sticks of hard shaving soap were used. Later, tubes containing compounds of oils and soft soap were sold. Newer creams introduced in the 1940s neither produced lather nor required brushes, often referred to as brushless creams.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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