An “Unprinter” for Laser-Printed Paper

What if you could “unprint” and reuse paper?

It may soon be possible. Scientists at the University of Cambridge (England) have developed a method that allows lasers to remove the toner from laser-printed paper.

To do this, a green laser is flashed at the page. The light from the laser is absorbed by the toner, which then detaches from the paper. The paper is left unharmed.

This is possible because with laser printing, the toner sits on top of the paper and is fused to it by heat. With inkjet printing, some of the dye is absorbed by the paper, so this technique wouldn’t work as well.

Assuming that it was in your price range, would you try out an unprinter?

You can read more about this topic here.

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