A breakthrough in tattoo technology allows for temporary ink that can be activated and erased almost instantly using ultraviolet light and sunlight. Researchers have developed a method where a specific ultraviolet LED triggers pigment visibility in just seconds, while exposure to bright sunlight reverses the effect—leaving no trace despite the pigment remaining embedded. The discovery could revolutionize body art by offering a non-invasive, reversible alternative to permanent tattoos. Scientists are exploring potential applications beyond aesthetics, including medical and diagnostic uses.
A 365-nanometer ultraviolet LED can switch a tattoo pigment on in about two to three seconds, and bright sunlight erases the color again within seconds, even though the pigment stays in the skin. That ...
