I also join the group of just "say no". But at least recently I have started to feel I can justify my "not for me!" As you can read below;
Among the concerns are the long-term effects tattoo inks can have on the immune system, pathology specimen interpretation and other unforeseen health complications.
Certain tattoo inks can be toxic, with some containing carcinogenic compounds, a 2012 Danish Environmental Protection Agency found. In fact, one in five tattoo inks contained carcinogenic chemicals, and a vast majority of the inks tested did not comply with international health safety standards for ink composition, an Australian government-sponsored study found. Even more concerning, carcinogens were identified in 83 percent of black inks – by far the most popular color for tattoos.
The European Society of Tattoo and Pigment Research was established in 2013 with a mission of educating the public about the “fundamental facts about tattooing” which many in the younger generations ignore. That group found barium, copper, mercury and other unsafe components in tattoo inks. Their research also found a disheartening mismatch between the listed ink container contents and its actual chemical composition found on testing.
More recently, the Food and Drug Administration has become more involved with tattoo inks, stating “Many pigments used in tattoo inks are industrial-grade colors suitable for printers’ ink or automobile paint.” Like the studies started overseas, the agency is now examining the chemical composition of inks and pigments and how they break down in the body, as well their short- and long-term safety.