Samples of casein plastic, c 1920-1960.
3 4 c m
actual image size: 32cm x 26cm

Samples of casein plastic, c 1920-1960.

Exton, David

© Science Museum / Science & Society Picture Library


Sheets and rods of casein plastic in demonstrating a wide range of colours and uses. At the centre is a trade card of furniture handles made by Erinoid Ltd of Birmingham at Lightpill Mills in Stroud, Gloucestershire. Casein is a semi-synthetic plastic present in skimmed milk. A rennet is used to precipitate it out. The casein is mixed with water, dyes or pigments and drawn out into shapes for machining. It is then cured by immersing it into a solution of formaldehyde. In the 1920s and 1930s it was known commercially as 'Erinoid' and was used to make furniture handles, buttons and other decorative items.



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