According to the report, the university of Cambridge engineers have developed a new method, can use laser removal of paper printing, copy of the writing and graphics, is expected to bring a "clear print" function of printers or copiers, to use the paper to print.
The technology is a kind of short pulse laser heating, through clearing has toner ink printed on paper, the laser will make the ink evaporation and won't damage the paper, as long as four over one billion of a second can remove a variety of printing and printing ink. The researchers also found that while using ultraviolet and infrared laser can effectively remove ink, but the effect is the best green laser is a kind of visible. This method without causing any physical damage to the paper doesn't make paper discoloration, evaporated into gas ink can also collected through a filter.
"This is a process that have an effect on a variety of carbon powder, and do not harm the printing paper, so can immediately take advantage of these paper in the office, easy." Julian ORR wood said led the study, and from the point of view of environmental protection, the technology can not only greatly reduce cut down trees used for paper making, also can be used as a cheaper recycling technology. According to their calculations, is to build a "clear printer" prototype to about 19000 pounds, with the technical improvement and commercialised, will further reduce the cost. Costs down to 16000 pounds, from the point of view in paper demand, in most office is economical to operate the equipment. They have contact with several commercial companies, these companies opposite the first output is interested in "remove printers".
Researchers think that "clear print" technology more environmental protection than chemically recycling waste paper, not only reduced the demand for chemicals, also can reduce carbon dioxide emissions by 79%.
(Gold Printing Group) |
