Different printers.

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Printers allow you to transfer images/text from your PC to paper, and can do so, using a variety of colour. In general, there are three different types of printers,two of which we are going to review. The three different types of printer are: a Dot Matrix Printer, an Ink Jet Printer, and a Laser printer.

Laser Printers:

The way laser printers work, is by using a print engine. This works by shining a very thin pattern of light, on to a type of metal drum. Black ink (toner), will stick to the parts of the drum that has been exposed to the light. The paper then rolls over the drum, and the image is transferred from the drum to the paper, but before the paper leaves the printer, it is heated to join the toner to the paper. Like the dot-matrix printer, the laser printer still prints using dots, however the dots are packed closely together, so they are almost impossible to distinguish.

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        The quality of laser prints is very high, this is because the resolution of al laser printers is at least 600 dots per inch (DPI) and the prints are very fast. They can print at least 10 pages per minute (PPM), but some can print as fast as 24 PPM. The set back is, that they are expensive to buy, and very expensive to run, as toner cartridges expire after about 6000 prints. Most laser printers are used for printing text and pictures in black and white, because although the colour cartridges give excellent quality, they are VERY expensive. This ...

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