Melting Packing Peanuts Use a solvent to show polystyrene packaging material is mostly air.  email to friend
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Melting Packing Peanuts - You won't believe your eyes when you see what happens to ordinary packing peanuts when they come in contact with fingernail polish remover. They seem to just "disappear".

In fact, the Styrofoam reacts with the solvent (usually acetone) in the remover solution to reveal the fact that Styrofoam is made up of mostly air.