About 90% of tattoo inks in the United States contain ingredients not listed on their labels, according to a study published this spring in the journal Analytical Chemistry. So how can consumers know what is safe to put into their skin?

To find out, Mike Rogers visited with Dillon Forte, a tattoo artist based in the Austin, Texas area, about how to know who to trust, the differences between black and colored tattoos, and how the industry is regulated differently in the U.S. than it is in Europe.