Xerox Phaser EX7750 参照ガイド

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Managing Color in Adobe Photoshop
For fastest print times, choose JPEG encoding, but inspect printed output carefully 
for unwanted artifacts that may appear as a result of JPEG compression. If you 
see unexpected results in the printed output, reprint the job using Binary or 
ASCII encoding.
Printing CMYK EPS files saved with PostScript Color Management
If you select the Photoshop PostScript Color Management option when you save a 
CMYK EPS image, Photoshop embeds PostScript color information that defines the 
CMYK source color space of the image. When you print a CMYK EPS file that 
contains PostScript color information to the Color Server, CRDs are used instead of 
ColorWise CMYK Simulation and Simulation Method settings. Choose the 
appropriate setting for the Rendering Style option.
Printing CMYK graphics with Photoshop PostScript Color Management
If you select a CMYK color space and decide to use PostScript Color Management, 
Photoshop sends CMYK data to the Color Server along with PostScript color 
information defining this CMYK color space. When you select PostScript Color 
Management, a CRD is used to perform color conversions to the CMYK color space 
of the Color Server.
The destination color space for the CRDs is determined by the RGB Separation print 
option. If RGB Separation is set to Simulation, the CMYK graphic is printed 
according to all specified CMYK Simulation Profile and CMYK Simulation Method 
settings. If RGB Separation is set to Output, the CMYK graphic is converted to the 
CMYK color space of the selected output profile.
Setting the Color Server print option Spot Color Matching to On has an effect only if 
you use the Photoshop Multi-Channel feature to define spot channels and then save 
the image in EPS format and open it in another application. For information see your 
Photoshop documentation.