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UV light patterns thermochromic crystals without damage, unlocking color-changing designs
Color-changing mood rings, forehead fever strips and car-shade indicators all change hues as they warm and cool, thanks to a phenomenon called thermochromism. On a smaller scale, thermochromism is use
Phys.org — 29 June 2026
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Color-changing mood rings, forehead fever strips and car-shade indicators all change hues as they warm and cool, thanks to a phenomenon called thermoc
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