A breakthrough in tattoo technology has shown that experimental inks can maintain their light-switchable properties in human skin for over two years, raising hopes for dynamic, reversible tattoos. Researchers demonstrated the stability of these inks, which change color in response to light exposure, though they emphasize the need for further safety assessments before practical use. The findings suggest potential applications beyond cosmetics, including medical or diagnostic purposes, but long-term effects remain untested. Scientists caution that larger studies are required to confirm safety and durability before the technology could be widely adopted.
Experimental tattoo inks stayed light-switchable for up to 2.2 years in one researcher’s skin. Broader safety testing is needed.
