According to the British Daily Telegraph report, engineers at the University of Cambridge in the United Kingdom have developed a new method that can use lasers to erase prints and images printed on paper, and is expected to bring a printer or copier with a "clear print" function to Reuse printed paper. Related papers were published in the British "Royal Society Journal Series A".
This technology uses a short-pulse laser heating to remove the toner ink that has been printed on the paper. The laser will evaporate the ink without damaging the paper. It can remove a variety of prints and prints in as little as 4 parts per billion. Ink. The researchers also found that although both ultraviolet and infrared lasers can effectively remove ink, the best effect is a visible green laser. This method does not cause any physical damage to the paper, nor does it discolor the paper, and the ink that evaporates into gas can also be collected by a filter device.
"This process works on a variety of toners without harming the printing paper below, so the paper can be reused immediately in the office, which is simple and easy." Said Julian Allwood, who led the study. And from the perspective of environmental protection, this technology can not only greatly reduce the felling of trees for papermaking, but also as a cheaper recycling technology. According to their calculations, the current construction of a "clear printer" prototype is about 19,000 pounds. With the improvement of technology and commercialization, the cost will be further reduced. When the cost drops to 16,000 pounds, it is cost-effective to use the equipment in most offices from the perspective of paper demand. They have now contacted several commercial companies that are very interested in producing the first "clear printer".
Researchers believe that “clear printing†technology is more environmentally friendly than recycling waste paper by chemical methods, which not only reduces the demand for chemicals, but also reduces carbon dioxide emissions by 79%.
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