by Guia Marie Del Prado On Business Insider / Science.
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. Some red inks even contain mercury.
The metals in the ink is what gives tattoos their permanency, but some inks have been known to cause allergic reactions like eczema or substantial scarring.
Read the full article here: