Here's how it works. Tattoo inks tend to be made of compounds from heavy metals. According to this Smarter Every Day video, tattoo inks often contain metals like lead, copper, and manganese.

Heavy metals in tattoo inks can get transported to migrating cells and organs such as liver, lungs and kidneys, Srinivas said ...

tattoo artists avoided these inks and manufacturers turned to alternative formulas. Today, manufacturers have largely switched to inks colored by organic compounds instead of compounds including heavy ...

The Environmental Protection Authority is calling for information on tattoo inks to make sure Kiwis are kept safe. Research ...

Metallica frontman James Hetfield revealed a tattoo he got in honor of a metal legend that included their ashes.

The Environmental Protection Authority (EPA) is seeking information about how tattoo inks are supplied, made and used in New Zealand to help assess whether the current rules are fit for purpose.