3 avril 2012
Magic sand
Normally when water is added to sand the outcome is predictable. The sand becomes
wet. This is not the case with MAGIC SAND! Magic Sand has the unique quality of staying
dry under water. You can buy Magic Sand on Ebay or make your own, spraying silicon (with a silicon spray) on classical sand.
Explanation:
Magic sand works because the silicone coating makes it repel the water molecules.The scientific
term for this is hydrophobic meaning to "fear water". Regular sand is referred to as being Hydrophilic or
"water loving" because it will absorb water. It's simply for that reason that magic sand is always dry.
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