It sounds like the kind of conversation two industrial designers might have at a bar: Could you cast metal using kinetic sand? Kinetic sand, you may remember, is that colored, polymerized sand that behaves more like Silly Putty than the stuff you find at the beach. It’s better at holding detail than standard sand; how would it behave when acting as a vessel for molten metal?
YouTube channel The King of Random asked and answered the question, using both molten aluminum and gallium, the latter of which has a melting point of only 85 degrees Fahrenheit:
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Source: core77