Laser photocopiersproduce high resolution, sharp images at fast speeds. When a page is inserted for copying, a scanner makes a digital image which is stored internally. An electric current is then passed through an aluminium drum coated with a photoconductive material and charges it. The scanned digital image is used as a template to guide a laser at the charged photoconductive material, creating a negative copy of the original. Very fine powdered ink called toner is then sprayed over the photoconductive layer, which sticks to the charged areas via static electricity. The image is then permanently fused onto paper by heating it and pressing it under pressure. The use of an internal scanner means that pages can be stored digitally on an internal memory, so it is a highly efficient, fast, precise and automated way of copying.
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