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Styrofoam MELTS in Nail Polish Remover! (Acetone) - Discovery Channel - Jeffrey Vinokur
http://www.DancingScientist.com
Styrafoam, which is 98% air, and 2% polystyrene plastic, slightly dissolves in nail polish remover made of acetone. The resulting putty is still polystyrene, but without all the air. It looses a lot of volume, but if you dry it up, you can cast it into plastic molds.
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