What’s Actually In Tattoo Ink? No One Really Knows
Chemists are hard at work figuring out how to make tattoos last—and ensure they’re safe.
![What’s Actually In Tattoo Ink? No One Really Knows](https://static.scientificamerican.com/dam/m/225cfca2d98f2cb5/original/SQ-Wednesday-EP-Art.png?w=1200)
Chemists are hard at work figuring out how to make tattoos last—and ensure they’re safe.
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