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Printers

08 Mar 2010 @ 3:36 PM

In todays lesson we learnt that there are 4 types of printers. These are laser printers, inkjet printer, dot matrix printer and daisy wheel. Laser printers use electrophotographic technology, inkjet printer use electrostactic spray technology and dot matrix printer use impact technology. The number of pages a printer prints in a minute is called ppm (pages per minute)

A tranditional inkjet printer which is commonly found in homes can print 2-6 ppm. It prints 2 ppm when it is using it full colours and 6 ppm when it is using black ink only. A modern laser printer which is more commonly found in a office can print 8-200 ppm using any colour. There are 4 colours that a printer can print these are cyan (blue), black, yellow and magenta(red).

Inkjet printers and laser printer can both print words and images but a dot matrix can only print words and a daisy wheel can only print words in the same size and font. The resolution on a image is mesured in dpi (dots per inch).