A dot matrix printer or impact matrix printer normally refers to a type of computer printer A computer printer is a computer peripheral device that produces hard copy (permanent human-readable text and/or graphics usually on paper) from data stored in a computer connected to it.
Monochrome, Color and Photo Printers
A monochrome printer can only produce an image consisting of one color, usually black. A monochrome printer may also be able to produce graduations of tone of that color, such as a grey-scale. with a print-head that runs back and forth on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like a typewriter
Unlike a typewriter, letters are drawn out of numerous individual dots, and thus, varied fonts and arbitrary graphics can be produced.
Each dot is produced by a tiny metal rod or "pin", which uses the power of a tiny electromagnet
Generally the print head prints one line of text at a time. Most dot matrix printers have a single vertical line of dot-making equipment on their print heads; others have a few interleaved rows in order to improve dot density.
Certain models produce double-wide or bold characters by printing each vertical slice of a character twice. It produces higher resolutions by moving the print head more slowly. It produces graphics by printing dots, one horizontal character-high stripe at a time. Though most print in black and white, a few produce colour by making extra passes, shifting a multi-color striped ink ribbon between passes.
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