Scientists develop tattoo ink that appears under UV light and fades in sunlight

A tattoo has traditionally been a commitment etched into the skin, with removal often involving multiple laser sessions, discomfort and considerable expense. But what if body art could be switched on for a night out and made to disappear the next morning? Researchers are developing a light-sensitive tattoo ink that could make that possibility a reality, while opening up intriguing applications in medicine.According to a report by Live Science, the technology, called PhotoTat, uses specially engineered pigments that respond to different wavelengths of light. Developed by a team including Carson Bruns, an associate professor of biomedical engineering at the University of Colorado Boulder, the system could eventually allow tattoos to change colour, remain hidden until needed or disappear from view without removing the pigment from the skin.