Black light reactive ink is designed for use in the human body as a tattoo ink. The dye is contained in micro-capsules that are embedded in the skin using electric tattooing equipment. According to the Tattoo Artists website, this ink only appears under black light and is completely safe to use. The ink contains no phosphors and is not considered a carcinogen. This is the same type of ink that is used to track animals and fish.
UV printer ink contains no solvents that require evaporation during the curing phase. Ultraviolet printer ink dries through interaction with an ultraviolet light source. The products have significant durability and coverage over the page. Despite these benefits, there are concerns over certain aspects of UV printer ink production and use. According to the EPA, UV cured inks release toxic elements into the air during the curing process, and its operating costs are among the most expensive of all printer ink types.
UV ink pens are the stuff of spy legend. These "invisible" ink scribblers are used by entertainment complexes and clubs as a discrete means of marking those who have successfully passed through security. UV ink is also used by police departments in place of traditional inks for fingerprinting and marking documents to prevent fraud. This ink doesn't have the health concerns of industrial grade UV printer ink and is generally safe for use on the skin.
UV paints are characterized by high pigment concentration for vivid color under ultraviolet or natural light. These paints are used to color many surfaces from lures for use in fishing to automobiles. UV paints are generally water-based to allow for easy clean up and do not lose luster when shifting from ultra-violet to normal light and vice versa.