HARMFUL CHEMICALS IN TATTOO INK
Mercury, cobalt sulphate, other soluble cobalt salts & carbon black are in Group 2B, which means they may cause cancer in humans
Cadmium & compounds of cadmium, on the other hand, are in Group 1 (carcinogenic to humans)
我見過tattoo染料進到淋巴係統的圖片
還有，tattoo 鼻環之類給人感覺是某種印記
