You know what I’m talking about(if not just search up “rainbow metal toy.” This material was so cool as a kid, is it some weird element or normal metal dyed somehow?
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It’s anodized aluminum. The process is different from simply painting metal, but it is effectively normal metal that has been dyed. The dye sits in a layer of aluminum oxide which is a little bit like rust, but unlike the rust that forms on iron which flakes away then penetrates deeper and causes more damage, aluminum oxide is a hard protective layer that stays on the surface, holding the coloring and preventing further damage to the metal.
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