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Hardware & Software Output Devices Laser Printers Laser Printers are based on the same technology as photocopiers - lasers produce an image on an electrically charged drum. Dry ink or toner sticks to the electrical charge and is fixed by heat. They have a high resolution of 1200+ dpi, and reproduce complex graphics very clearly. They are very quiet and operate at reasonably high speeds of between 8 and 30+ ppm. Some laser printers work only in black and white - those operating in colour and the faster speeds are the most expensive. Ink-jet printers Ink-Jet printers use liquid ink to spray characters onto a page. They also offer a high resolution of up to 1200 dpi and it can be difficult to tell the difference between a print produced on a good quality ink-jet and a standard laser printer. However, they operate at much slower speeds of between 6 and 10 ppm for black and white...

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