Cambridge have now developed a gadget that can "unprint" or "unphotocopy" ink of a piece of paper. The researchers say that this machine works on normal toner ink cartridges and is more Eco Friendly than recycling. What happens is the laser heats up the ink and vapourises it so the ink is now not on the paper. The ink is only so thin, so the laser needs to be quite short, otherwise it could burn through the paper!
By George :)