Comment by humblebeekeeper

As someone who is heavily tattooed, I'd LOVE to see this analysis for tattoo inks.

Fun fact: UV light makes tattoo particles smaller, which makes them easier for your lymphatic system to carry them to your lymph nodes. The particles are easy to transport into the lymph nodes, but difficult for your body to remove from your lymph nodes, meaning that for heavily tattooed people like myself, surgeries can be a potentially very colorful endeavor! (Or, if you have primarily black tattoos, it can be a spooky endeavor, I suppose.)