Although they’ve been around for many years now, UV tattoos, also known as black light tattoos, have been growing in popularity, both among club goers craving attention, and tattoo lovers wanting to make their traditional ink stand out in certain conditions. And then there is the third category, the people who want to keep their ink virtually invisible in their day to day life, only to showcase it in all its glory under ultraviolet light. Whatever the case, there are a few interesting things you should know about this intriguing tattoos.