Xerox Phaser EX7750, Color Manual

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1-8 EX7750 Color Management
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PostScript applications (such as QuarkXPress) may convert elements defined as
RGB = 0, 0, 0 to four-color CMYK black before sending the job to the EX7750. These
elements are not affected by the Pure Black Text/Graphics option. For details, see the
Fiery Color Reference . Also, black text and line art defined as RGB = 0, 0, 0 in office
applications (such as Microsoft Word) are converted to single-color black (CMYK =
0%, 0%, 0%, 100%) by the Microsoft PostScript Level 3 driver for Windows
2000/XP. To print this single-color black at the maximum toner density of the printer,
set the Pure Black Text/Graphics option to On.
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This feature is not available with the PCL driver.
Black Overprint
The Black Overprint option allows you to specify whether or not black text or
text/graphics, defined as RGB = 0, 0, 0, or as CMYK = 0%, 0%, 0%, 100%,
overprints colored backgrounds.
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Text
—Black text overprints colored backgrounds, eliminating white gaps and
reducing halo effects or misregistration of colors.
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Text & Graphics
—Black text and graphics overprint colored backgrounds,
eliminating white gaps and reducing halo effects or misregistration of colors.
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Off
—Black text or text/graphics knocks out colored backgrounds.
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PostScript applications may perform their own black overprint conversions
before sending the print job to the EX7750.