Table. Chemical Ingredients of the Tattoo Inks Injected into the Patient’s Skin (selection).

Chemical Ingredients	Black Ink*	White Ink*
Formaldehyde	63 (total) / 11 (free)	<1
Nickel	5.2 ± 1.3	15.5 ± 0.6
Cobalt	0.70 ± 0.03	0.14 ± 0.01
Manganese	60 ± 3	11.0 ± 0.5
Cadmium	0.37 ± 0.03	0.07 ± 0.02
Antimony	0.70 ± 0.04	0.04 ± 0.01

* all values reported as [mg/kg ink]