"Plastic made from milk" —that certainly sounds like something made-up. If you agree, you may be surprised to learn that in the early 20th century, milk was used to make many different plastic ornaments —including jewelry for Queen Mary of England! Plastic from milk ~ Casein Plastic ~ Galalith What is it 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. What is Casein? Casein is the name for a family of related phosphoproteins. These proteins are commonly found in mammalian milk, making up 80% of the proteins in cow's milk and between 20% and 45% of the proteins in human milk. Casei...