is there side effect using charcoal mix in tatoo ink inorder to give a total piitch black effect

is there any side effect using charcoal mix in tatoo ink inorder to give the artwork a total pitch black effect and what kinda charcoal if any can b used

Don't you think that if charcoal was a good ingredient to make black it's blackest, it would have been on the market already? Leave it to the experts, dude. The base metals used in tattooing have been well researched. Leave it to them...