Xerox has invented paper that can be rewritable, and paperless office does not seem to be so urgent.
   This kind of paper uses special chemical materials, the above content will disappear after 24 hours, change back to a blank paper, you can also use a printer to erase it. The printer used is also special, a special laser instead of ink.
   The company said that this technology will save countless trees and save an average of £70 per person per year per company.
Xerox 's data shows that 44.5% of the printed content does not need permanent storage at all. Temporary content is best suited for this kind of rewritable paper, and this technology can save 7 trillion papers every year!
   This technology will come out next year. The key to success is cost.