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Image size and resolution

The printer resolution is specified in color dots per inch (dpi). In general, the more dots per inch, the finer the printed output. Most inkjet printers offer a resolution of around 720 to 2880 dpi. (Strictly speaking, inkjet printers do not produce dots like imagesetters or laser printers, but a microscopic inkjet.)

Printer resolution is not the same as image resolution, but it is related to it. To output a photo in good quality on an inkjet printer, you should choose an image resolution of at least 220 ppi.

The Grid width corresponds to the number of printer dots or grid cells per inch that are used to output grayscale images or color separations. The grid ruling is in Lines per inch (lpi) or Rows of grid cells per inch (with halftone screens) measured. The higher the resolution of the output device, the finer (higher) screen rulings are possible.

The relationship between image resolution and screen ruling determines the quality of the printed image. For the optimal output quality of raster images i. d. Usually an image resolution is used that is 1.5 to a maximum of 2 times as large as the grid width. However, for some images and output devices, lower resolution will produce good results. You can find information about the screen ruling of your printer in the documentation for the device. If necessary, contact your service provider.