For those who wish they could temporarily turn their tattoos invisible, change the design on a whim, or just add a little extra pizzazz to their ink, a solution may be near at hand.
Carson J. Bruns and his team at the University of Colorado Boulder have invented PhotoTat, a system of inks for creating full-color tattooed images that appear and disappear in response to light (Matter Light 2026, DOI: 10.1016/j.matlit.2026.100119).
