Human used paper to record and draw. The paper will become trash when they have no any useful, it has been enormous waste, but the Xerox has invented a stuff to solve this trouble. They invented a kinds of erasable paper, the word written with a special pen will be clear away after 24 hours, and the paper can be use again. This technique uses some compounds that be able to absorb certain of wavelength of light, the compounds will be restored after slowing volatile. The scientists have focused on research and development a kinds of printer with such tech to complete the whole process, In the long run, even though this kind of paper do not good to save the data, but it still work a bit in office. xerox

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