ARE THERE GLOW-IN-THE-DARK INKS OR FLUORESCENT INKS?
Fluorescent ink is not the same as glow-in-the-dark ink. Fluorescent inks glow under ultraviolet light. Phosphorescents glow after being exposed to light, and glow-in-the-dark things that glow without any outside stimulus are almost unknown. There are *no* glow-in-the dark inks. There are *no* phosphorescent inks. For a brief time around 1991, some tattoo artists experimented with fluorescent inks that glow under UV light. At the time, it was thought that these could be used to make tattoos that would only be visible under UV light. As it turned out, these inks did not perform as expected. They were not invisible under normal light, and in some cases turned brown. At the same time, many people reported skin irritation problems. As a result, we are not currently aware of any tattoo artists still using these inks. There is a collection of information about these inks at: http://www.bme.freeq.
