Xerox Fiery color server, User Manual

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2-5 PostScript applications
PostScript applications
Most applications used for illustration, pixel editing, and page layout can create the
PostScript information they send to a PostScript printer or save in PostScript files.
Illustrator, Photoshop, PageMaker, QuarkXPress, and Macromedia FreeHand are
all PostScript applications.
PostScript applications work with color in many different ways. Most allow you to
choose process colors (by entering percentages for cyan, magenta, yellow, and black),
as well as
named colors from a spot color system, such as PANTONE. When you
print composites, these applications send process-color equivalents for named spot
colors to the Color Server. In some applications, you can also choose colors using the
RGB, HSB, HSL, or other color models.
Generally, PostScript applications send color information to the Color Server as
CMYK data. An exception to this is an RGB image placed in the document, which is
sent directly to the Color Server (unless you specify special color management settings
in the application.) In addition, some PostScript applications that allow you to define
colors in RGB or other color models can also send data to the Color Server in those
color spaces.
Color controls in PostScript applications are typically designed for printing on an
offset press, and some adjustments are required for printing to the Color Server.
Displayed versions of colors you choose in these applications may not match
Color Server output exactly, and named colors may not print accurately on the
Color Server, since these colors typically require custom inks.