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Tattoos are an incredibly common form of permanent self-expression that date back thousands of years. Most tattoo artists follow strict health and sanitation regulations, so you might assume that ...

The E.U. has prohibited some pigments, deeming them potentially hazardous to humans. Artists and manufacturers around the world are struggling to find replacements. Alex De Pase, a famed tattoo artist ...

John Swierk receives funding from National Institute of Health, National Science Foundation, and American Chemical Society Petroleum Research Fund. Tattoos are an incredibly common form of permanent ...