Ricoh AP3850C Service Manual Page 24

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1
1-8 Fiery 3850C Color Management
NOTE: The Pure Black Text/Graphics option can be used only when printing
composites, not when printing separations.
NOTE: 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
Fiery 3850C. These elements are not affected by the Pure Black Text/Graphics option.
See the application notes for details. 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 3 driver for Windows
2000. To print this single-color black at the maximum toner density of the printer, set
the Pure Black Text/Graphics option to On.
Black Overprint
The Black Overprint option lets you specify whether or not black text, defined as
RGB = 0, 0, 0, or as CMYK = 0%, 0%, 0%, 100%, overprints colored backgrounds.
On—Black text overprints colored backgrounds, eliminating white gaps and
reducing halo effects or misregistration of colors. Setting Black Overprint to On
automatically activates the Pure Black Text/Graphics option.
Off—Black text knocks out colored backgrounds.
NOTE: PostScript applications may perform their own black overprint conversions
before sending the print job to the Fiery 3850C.
Input
black color
Pure Black Text/Graphics
On Off
RGB
Prints 100% black
With the default profile, prints a rich black using all
toners.
CMYK
Prints only with black toner, because CMYK
simulations preserve the black channel. The actual
amount of toner used depends on the current
simulation and the calibration state of the printer.
Spot
Prints only with black toner, because spot color
simulations preserve the black channel. The actual
amount of toner used depends on the current
simulation and the calibration state of the printer.
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