Tattoo ink can be turned on and off with light

Tattoos are permanent, but a new technique developed by researchers at the University of Colorado Boulder allows them to be turned on and off. In a study in Matter & Light, researchers detail a technique using photochromic dye in tiny plexiglass spheres as tattoo ink. — Read the rest The post Tattoo ink can be turned on and off with light appeared first on Boing Boing.

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