Xerox 2045 补充手册

With PostScript 3 color, RGB Source Profile affects all CIEBasedABC color spaces 

(if the source space is RGB). For example, if you send CMYK data to the Fiery EXP6000/
EXP5000 in CIEBasedDEFG format by choosing PostScript Color Management in 
Photoshop, the setting for the Rendering Style print option, which normally affects only RGB 
data, also affects this CMYK data.

The following sections provide detailed explanations of the ColorWise print options and how 
these options affect print jobs.

For information about the following print options, see 

• Halftone Screen

• Paper Simulation

• Substitute Colors

The Black Detection option allows you to specify whether or not to detect black-and-white 
pages before printing your job. To use this option, set Color Mode to CMYK, Standard Color, 
or Expert Color.

•

: Select Off if your job consists of black-only text pages combined with a significant 

number of color pages.

•

: Select On if you are printing a predominantly black-and-white job.

The Black Overprint option allows you to specify whether or not black text, defined as 
RGB=0, 0, 0, or as CMYK=0%, 0%, 0%, 100%, overprints colored backgrounds. 

•

: Black text overprints colored backgrounds, eliminating white gaps and reducing the 

halo effect or misregistration of colors. Choosing this setting automatically activates the 
Pure Black Text/Graphics option.

•

: Black text and graphics overprint colored backgrounds, eliminating 

white gaps and reducing halo effects or misregistration of colors. Choosing this setting 
automatically activates the Pure Black Text/Graphics option.

•

: Black text or text/graphics knocks out colored backgrounds.

Before sending the print job to the digital press, PostScript applications may perform 

their own black overprint conversions.