https://news.ketelle.co.uk/entities/tattoos Stories involving Tattoos, told neutrally, with how each side covers them. en-gb https://news.ketelle.co.uk/stories/researchers-develop-tattoo-ink-that-can-be-switched-on-and-off-with-li https://news.ketelle.co.uk/stories/researchers-develop-tattoo-ink-that-can-be-switched-on-and-off-with-li Sun, 11 Oct 2026 13:01:15 +0100 Science A University of Colorado team led by Carson Bruns has developed "PhotoTat", a tattoo ink whose colour is switched on by ultraviolet light and erased by bright light. Coverage notes possible medical uses alongside limits and unresolved safety questions. (2 outlets: 0 left · 2 centre · 0 right)