> 90% of tattoo ink contains chemicals that can cause organ damage<p>It is not what the study says. What the study says is "Out of 54 inks, 45 contained unlisted additives and/or pigments".<p>I mean, 100% of tattoos cause damage to the body, people know that. The problem is that people would like to know if it their particular case, because of an allergy, it may be worse than usual. And for that, knowing what's in the ink is important, and that's what the article is about.