Researchers at the University of Cambridge have developed what they call a laser 'unprinter' - a device that is able to remove toner ink from paper. A production model would allow businesses to reuse ...

A close-up image of a sheet of "unphotocopied" paper reveals most of the toner has been removed A process to "unphotocopy" toner ink from paper has been developed by engineers at the University of ...

Developing electronic paper that can be written on and then erased with the touch of a button is a challenge. Sometimes the ink must adhere to the paper and other times bead up. Getting it just right ...