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What's in tattoo ink? My team's chemical analysis found ingredients that aren't on the label and could cause allergiesMost tattoo artists follow strict health ... which my work observed to be the only blue and green pigments in the inks we tested. The EU banned these pigments over concern that their use in ...
In this project, the researchers developed a tattoo ink made of photochromic microcapsules; a few seconds of tattooing this ink into skin leaves a color-changing mark that is activated by UV light.
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