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Halftoning

Halftoning is always device specific. The Print Server executes the halftoning. In this manual, halftoning always refers to ’Type3’ halftoning. The following halftone cells are available:

Name

Description

/Halftone1200x1200_dot125

/Halftone1200x1200_dot200

/Halftone1200x1200_line200

Default for 1200x1200

/Halftone1200x1200_line200coated

/Halftone600x2400_dot125

/Halftone600x2400_dot200

/Halftone600x2400_line200

Default for 600x2400

/Halftone600x2400_line200coated

/Halftone106lpi_4

Default for 600x600

Note that using 1200 dpi halftone cells in combination with 600 dpi HWResolution can result in a poor print quality. The PostScript file must use the appropriate dither matrices for each resolution.

HWResolution

Use parameter /HWResolution to specify the bitmap resolutions. Changing the HWResolution pagedevice parameter changes the resolution of the page contents during rasterising. The resolution is set per job. The default settings in the Settings Editor are used.

/HWResolution [600 2400]

/HWResolution [1200 1200]