New research has found that nickel- and chromium-related contact allergic reactions may have more to do with worn out tattoo needles than the ingredients in tattoo ink. Titanium dioxide particles found in white tattoo inks--often used to brighten other colours--appear to abrade tattoo needles, leading to tiny particles of nickel and chromium being deposited in the skin. Those particles then travel to the lymph nodes.
Watch the healthminute.tv video below for more information