John Swierk is an assistant professor of chemistry at Binghamton University, State University of New York. Tattoos are an incredibly common form of permanent self-expression that date back thousands ...

What's in your tattoo ink might differ from what the label claims. Over 80% of the inks analyzed in a recent investigation have been found to contain unlisted additives and pigments. John R. Swierk, ...

Today’s youth are more colorful than their parents, at least when it comes to permanent body art. Once considered taboo in mainstream cultures in the US and Europe, tattoos are more accepted socially ...

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