This message will self-destruct in five seconds: Cambridge scientists unveil laser 'unprinter' that deletes words on paper

A new printer invented by Cambridge scientists sounds more like a gadget from James Bond's Q Branch than something from an office supplies store.

Instead of printing pages it 'unprints' them, turning out pristine, clean sheets which can even be reused. 

The device uses a green laser to heat up toner particles attached to fibres in the paper, causing them to evaporate.

This means the paper can be reused - creating a massive boost for the environment by reducing carbon emissions and deforestation.

Early estimates predict the pioneering research could lower emissions in the paper and pulp industry by a staggering 50 per cent.

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