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Glossary 427
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.
Creep The effect of middle pages of a folded signature extending slightly
beyond outside pages, compensated by shingling. See also
Shingling
.
Crop To eliminate portions of an illustration or photography so the
remainder is more clear, interesting or able to fit the layout.
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).
DCS
Abbreviation for Desktop Color Separation, an EPS format
containing 5 files. Four of the files contain the color information for
each of the CMYK colors and the fifth is a low-resolution composite
file for use in electronic page layout. See also
OPI .
Degradé
A gradual blend or transition between colors. Also known as vignette
or graduated blend (
Vector drawing ).
Digital front end system
In electronic publishing, this is the workstation or group of
workstations containing the applications software for preparing pages
of type and graphics. In prepress, this is the workstation that gives
access to the user for the operation of hardware. For example, proofer,
platesetter, imagesetter.
Digital proof A black and white or color image reproduction made from digital
information without producing intermediate films. It can be output
as a digital hard proof using a peripheral output device or displayed as
a digital soft proof on a video monitor.
Dot The individual element of a halftone.
Dot area
The percentage of an area covered by halftone dots ranging from no
dots at 0% to a solid ink density at 100%. The size of a single dot is
stated in a percentage of the area it occupies.