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Ep 226: Ice, Snow, and Cooling Paint in July

Hackaday Podcast

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Radiative Sky Cooling Paint

Night hawkin light is making radiative sky cooling paint out of calcium carbonate. He's doing that by combining washing soda which is sodium carbonate with calcium chloride and citric acid in a blender. The pigment he mixes up with a kind of a homemade acrylic base which he makes out of acetone to keep it from becoming completely transparent.

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