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galalith
Galalith (Erinoid in the United Kingdom) is a synthetic plastic material manufactured by the interaction of casein and formaldehyde. Given a commercial name derived from the Greek words ''gala'' (milk) and ''lithos'' (stone), it is odourless, insoluble in water, biodegradable, antiallergenic, antistatic and virtually nonflammable.
==Discovery==
In 1897, the Hanover, Germany mass printing press owner Wilhelm Krische was commissioned to develop an alternative to blackboards. The resultant horn-like plastic made from the milk protein casein was developed in cooperation with the Austrian chemist (Friedrich) Adolph Spitteler (1846–1940). The final result was unsuitable for the original purpose.〔 In 1893, French chemist Auguste Trillat discovered the means to insolubilize casein by immersion in formaldehyde.
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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