Erinoid

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.

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.

Although it could not be moulded once set, and was hence produced in sheets, it was inexpensive to produce due to its simple manufacture. Galalith could be cut, drilled, embossed and dyed without difficulty, and its structure manipulated to create a series of effects. No other plastic at the time could compete on price, and with ivory, horn and bone products becoming far more expensive, it found a natural home in the fashion industry.

This new plastic was presented at Paris Universal Exhibition in 1900. In France, Galalith was distributed by the Compagnie Française de Galalithe located near Paris in Levallois-Perret. As a result, the Jura area became the first one to use the material.

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