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Glossary 187
CMYK The process colors - Cyan, Magenta, Yellow and Black. See
also
Color separations
,
Process colors
, and
Subtractive color
model
.
Color gamut
The range of colors possible with any color system.
Color separations Separate films are prepared for each of the process printing
inks - cyan, magenta, yellow and black. These films are used
to prepare the printing plates for printing on press. See also
CMYK
.
Composite mode In composite mode, the data required to separate a page into
its CMYK components is all contained within one single
(composite) file. Brisque or PS/M then separates the file into
CMYK as part of the conversion process. This processing
mode is the fastest and most efficient in the majority of cases.
Crop
To eliminate portions of an illustration or photography so the
remainder is more clear, interesting or able to fit the layout.
CSA (Color Space Array)
The spectrum of specific variants of a color model with a
specific gamut or color range. For example, within the color
model RGB, there are numerous color spaces, such as Apple
RGB, sRGB, and Adobe RGB. While each of these define
color by the same three axes (R, G, and B), they differ in gamut
and other specifications. CSA is comprised of a three-
dimensional geometric representation of colors that can be
seen or generated using a certain color model and are
quantitatively measured. Source CSA is to be used only under
the assumption that the upstream color workflow was
managed and monitored. Otherwise it should be replaced with
a Creo profile, which is the default.
CSA Profiles
There are three CSA profiles with gammas of 1.8, 2.1 and 2.4.
The higher the gamma, the darker the RGB appears. This
workflow should be used when you have images from different
sources, such as digital cameras, Internet, and scanners and
you want the images to have the common RGB color spaces.
Other possible CSA profiles are sRGB and Adobe RGB.
CT
Abbreviation for continuous tone. Color or black and white
photographic images with tones that change gradually from
dark to light (unlike the abrupt changes in linework).