Laser printers print text and images at astonishing speeds and of great quality. Laser printers print by scanning a laser beam over the printer’s photoreceptor, also called the drum.
Laser stands for Light Amplification by Stimulated Emission of Radiation. This means that the photons or particles of light are controlled through stimulated emission. This results in a very narrow beam of light that can travel long distances without dispersion with enormous power densities.
Laser printers are extremely useful when documents need to be printed quickly while maintaining uncompromised quality. Along with producing great quality prints, laser printers work at terrific speeds. A high-end laser printer can print up to 200 monochrome (black and white) images in a single minute. Moreover, a high-end colour laser printer prints up to 100 pages per minute or 6000 prints in an hour.
The laser printer was invented by Xerox way back in 1969. The principle behind the functioning of laser printers is very similar to that of a photocopier. The basic difference is that a photocopier uses light over the piece of paper, while the laser printer uses a laser beam over a digital source.
These printers, like photocopiers, use toners instead of ink for printing. While impact printers spray the ink on the paper, in the case of laser printers, the paper grabs the toner. Toners are not ink, but electrically charged powders comprising pigment and plastic. The pigment in the toners provides the colour and is blended into plastic particles. This results in the toner melting when it passes through the heat. Thus, the toner firmly binds to any kind of paper, and the text or image will not smudge easily.
There are a number of advantages of laser printers over inkjet printers. Though they may be expensive, they are easier and cheaper to maintain as toners are much cheaper than expensive ink cartridges and they provide a great quality print at amazing speeds.
The latest generation of laser printers is perfect for the graphics industry, as they can print at an incredible 1200 dpi. This results in superb photo quality, and is a boon for image editors, digital photographers, graphic artists, designers and other professionals.
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