Lucas123 writes: "The same Xerox lab that brought us Ethernet, the GUI and the mouse demonstrated paper that can be reused after printed text automatically deletes itself from its surface in a day. Instead of trashing or recycling after one use, a single piece of paper can be reused up to 100 times. "The paper contains specially coded molecules that create a print after being exposed to ultraviolet light emitted from a thin bar in a printer. The ultraviolet bar itself is very small, so it can be used in mobile printers. The technology could also be useful for network printing.""
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