Researchers Use Lasers to Un-Print Printed Paper

However, researchers at the University of Cambridge now claim that ultrafast and long-pulsed lasers can be used to save printed paper from the trash bin and prepare it for reuse.

According to a paper published in Proceedings Of The Royal Society A, a 532 nm green laser light with a pulse length of 4 nanoseconds can evaporate printed toner from paper without significantly damaging it. The process works two to three times before damage would become apparent via a slight yellow tint of the paper, the scientists said. They do not claim that the process is perfect, but they believe that they are on a promising path to enable an un-printer at some point.

According to a press release released by the University of Cambridge, the print removal would be much more environmentally friendly than recycling and producing new paper. Compared to recycling, the un-printing process would save an estimated 50 to 80 percent of carbon emissions.

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  • arvalin_dakaria
    But would it be cost effective?
    15
  • keyanf
    Something tells me fixing the print code so you don't wind up with various pages with 1 line each in the first place is more cost efficient...
    14
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  • arvalin_dakaria
    But would it be cost effective?
    15
  • keyanf
    Something tells me fixing the print code so you don't wind up with various pages with 1 line each in the first place is more cost efficient...
    14
  • mcd023
    if you have an office that prints and disposes tons of paper, it'd be effective. just be sure not to get them crumpled! how many new paper jams would that cause?
    3