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Device that turns pink before you do

12th March 2009

A team from the University of Strathclyde have created a device which turns pink and shows its wearer if they are at risk of sunburn.

Professor Andrew Mills, the team's leader, said they used a thin film which changed colour on exposure to UV light by means of an acid-sensitive dye.

"People think of chemical reactions as happening in test tubes," he said. "But here you have a reaction in a very thin layer of ink film that produces a colour change."  

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