If you ask us, the idea of rewritable paper seems pretty redundant no matter how high-tech it is. Apparently that didn't cross the mind of scientists at the University of California, Riverside. See, that's where Yadong Yin and his colleagues are using special color-switching dyes (called "redox") and an ultra-violet light to put text on a physical medium. In this case, that's a glass or plastic film like the tile above. The school says that these can be rewritten some 20 times...
Read more: http://ift.tt/1wDbufo
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