| laser printer A non-impact high-resolution printer which uses a rotating disk to reflect laser beams to forms an electrostatic image on an imaging drum. This attracts electrically charged [magnetized?] toner (dry ink powder) which is then transferred onto the paper and fused into it by heat. Print resolution ranges between 300 and 600 dots per inch (DPI). Laser printers using chemical photoreproduction techniques can produce resolutions of up to 2400 DPI. Print speeds may exceed 21,000 lines per minute, though printing speed is more often given in pages per minute. If a laser printer is rated at 12 pages per minute (PPM), this figure would be true only if the printer is printing the same data on each of the twelve pages, so that the bit map is identical. This speed however, is rarely reached if each page contains different codes, text, and graphics. Although there are dozens of retail brands of laser printers, only a few make , e.g. , , , and . (2001-02-16) |
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