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milkplastic_20080613.jpg

Casein, a protein found in milk, can be easily precipitated from standard moo juice with vinegar and turned into a malleable homemade plastic. Coffeebot wrote an Instructable that shows you how:

The final product is quite rigid when it’s thick (1/8 inch or thicker), moderately pliable when it’s a little thinner, and brittle if it’s paper thin. It’s also sandable and paintable.

I guess casein-based plastics used to be all the rage for buttons, jewelry and pens at the beginning of the 20th century.

Homemade Plastic From Milk [via MAKE]

See also: Moldable plastic from styrofoam


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