Cool chemistry trick allows new tattoos to 'turn on and off'
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The new tattoo ink is activated under UV light. (Image credit: Matter & Light, Bruns et al.)Researchers have developed a new type of tattoo ink that can be switched on and off with light, allowing colors and images embedded in the skin to be changed and even "erased" without having to go through the painful tattoo-removal process. The system, which is being commercialized under the name PhotoTat, could eventually give people a way to conceal or change permanent body art. It could also have more
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