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The Laser Unprinter

MrSeb writes "You've heard of laser printers — and now a team of researchers from the University of Cambridge in England has created a laser unprinter that can remove ink without damaging the paper. Despite both methods using lasers, their (un)printing approaches are fundamentally very different. In a laser printer, a laser is used to give individual 'pixels' on a piece of paper a positive charge (a separate heat source is used to fuse toner). In the laser unprinter, picosecond pulses of green laser light are used to vaporize the toner, or ablate in scientific terms. The primary goal of unprinting is to cut down on the carbon footprint of the paper and printing industries. Manufacturing paper is incredibly messy business, with a huge carbon footprint. Recycling paper is a good step in the right direction, but it still pales in comparison to unprinting. In a worst-case scenario, The University of Cambridge unprinting method has half the carbon emissions of recycling; best-case, unprinting is almost 20 times as efficient."

3 of 168 comments (clear)

  1. *hands in 20 stapled blank pages* by DSS11Q13 · · Score: 4, Funny

    Professor, I totally had my paper finished but I accidentally unprinted it!

  2. Re:Fraud by miknix · · Score: 4, Funny

    Just stop using paper! Just as soon as a simple 8.5x11 epaper-pads is available at the right price that has wifi and nfc I'm going to either get fired or get those deployed. Paper is a horrible waste as is maintaining printers and storing the crap and all of that. We use paper for trivial bullshit that then gets thrown away. Paper and printing are costing us 12 million over the last 10 years though costs have decreased some it's leveled off and my prediction is it will cost 9 million for the next ten. I want us weened off paper for the trivial bullshit NOW. Hell I could by sixty thousand of the damn things for 150 each with 9 million. Several 'paper is god' dinosaurs will by gone soon so I may have a shot. Dunno.

    I don’t believe you, continue.

    Signed - Dwight Schrute

  3. Re:Ablation by Em+Adespoton · · Score: 5, Funny

    Now they need a charged drum that collects the vaporized toner and puts it in cartridges....