GoKawiilResearcher develops UV-activated invisible tattoo ink, tests it on himself
Nanoscientist Carson Bruns of the University of Colorado Boulder tattooed his own leg with an ink that stays invisible until exposed to ultraviolet light, and can be erased with bright visible light. His team created magenta, yellow and blue versions made of photochromic dye encased in tiny acrylic spheres, tested on pig and silicone skin, with findings published in Matter & Light. Bruns previously commercialized a related UV-reactive ink called Magic Ink through his startup HYPRSKN in 2024.