![]() A dot matrix printer, for example, applies ink via tiny rods striking an ink ribbon, and has a relatively low resolution, typically in the range of 60 to 90 DPI (420 to 280 μm). ![]() The range of DPI supported by a printer is most dependent on the print head technology it uses. A printer does not necessarily have a single DPI measurement it is dependent on print mode, which is usually influenced by driver settings. Up to a point, printers with higher DPI produce clearer and more detailed output. This is caused by the spreading of ink on the surface of the media. DPI is used to describe the resolution number of dots per inch in a digital print and the printing resolution of a hard copy print dot gain, which is the increase in the size of the halftone dots during printing.
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