A breakthrough in tattoo technology has shown that experimental inks can remain light-switchable in human skin for extended periods, with one test lasting over two years. The discovery suggests potential for dynamic, reversible tattoos that change appearance under light exposure, though researchers emphasize the need for further safety assessments before practical applications. While the findings highlight advancements in bioengineered pigments, long-term effects and biocompatibility remain key concerns for future development. The study underscores both the promise and the caution required in integrating such innovations into everyday use.
Experimental tattoo inks stayed light-switchable for up to 2.2 years in one researcher’s skin. Broader safety testing is needed.
