Color Management; Halftone Dots And Screen Angles; Halftone Screens - Xerox DocuColor 5252 Operator's Manual

A bo u t c ol o r p r i nt i ng

Color management

Halftone dots and screen angles

Halftone screens

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Since the color on a screen differs from the color produced by the
press, it is necessary to have a Color Management System
(CMS). The CMS identifies and bridges the gap between the RGB
and CMYK color spaces belonging to your monitor, press, and
scanner. Mac and Mac OS compatible computers use the Apple
ColorSync CMS to implement and handle the profiles of these
devices. For Windows - based PCs, refer to your PC Operator
Manual for the compatible CMS.
Without a color management system, one image will appear
different when reproduced on different devices due to
inconsistencies in color gamuts.
A color management system helps you obtain more consistent
results by aligning the color gamuts used by different devices.
To produce continuous tone images on an output device, bitmaps
and process color graphics must be broken into a series of dots of
various sizes and colors. This creates a halftone screen. Halftone
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screens combine cyan, magenta, yellow, and black dots at
different screen angles to form a four-color image. The structure
and patterns by which the colors are combined are the halftone
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screens. When a certain color is required, the halftone screen
determines the dots to color, the color to use, and the degree to
which each dot is colored. The figure on the left illustrates a
halftone screen.
D oc u Co l or 5 25 2 O pe r a to r M a nu a l