Galalith, also known as milkstone or casein plastic, is a type of plastic created from casein, which is a protein found in milk. It was first developed in the early 20th century, around 1897, and is notable for being one of the first synthetic plastics produced. Galalith is made by mixing casein with formaldehyde and often other chemicals, which results in a thermosetting plastic that can be molded into various shapes.
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