"Nanoengineer creates 'magic' tattoo that wearers can turn off and on"

An assistant professor from the University of Colorado at Boulder has developed Magic Ink, a tattoo ink that can be turned on and off using different types of light. The ink, which replaces standard tattoo ink nanoparticles with lab-built nanoparticles, can be activated with UV light and deactivated with bright white light or sunlight. It offers a temporary tattoo option for those who are less committed and could also benefit cancer patients who want to remove the small alignment tattoos they receive during radiation therapy. Magic Ink is in the process of commercialization and has been tested on over 50 people.