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Glossary
Additive color model
A system in which color is produced by combining
primary lights additively. The additive primaries are
red, green, and blue. When added together in
proper amounts, these colors produce white. An
RGB video monitor is based on an additive color
model.
Additive primaries
Red, green, and blue light that is used in additive
color systems. The additive primaries combine to
produce white.
Banding
Visible steps between shades in a gradient.
Bit depth
Amount of information required for each pixel in a
raster image. Black and white images require only
one bit per pixel. Photographic quality color images
can require 24 or 32 bits per pixel.
Calibrated RGB
An RGB color space used by KX-P8420 color
management software as an interchange standard.
The Calibrated RGB color space is defined
according to the following specifications for a color
monitor: SMPTE phosphors, a white point D50,
and gamma of 2.2.
Calibration
The process of ensuring that a device behaves
consistently with respect to a set of specifications.
Color gamut
See
gamut.
Color rendering dictionary (CRD)
A feature found in PostScript Level 3 color printers
that gives improved matching between the monitor
and printed output. Color rendering dictionaries are
used by the printer’s PostScript interpreter when
converting RGB data sent to the printer to CMYK
data used by the print engine.
Color rendering style
A feature of KX-P8420 color management software
that allows you to maintain the best possible
translation of color from one color device to
another. The KX-P8420 color rendering styles are:
photographic transparency and presentation.
Color space
A model for representing color in terms of
measurable values, such as the amount of red,
green, and blue in an image. RGB and CMYK color
spaces are based on color devices—monitors and
printers respectively. Other color spaces, such as
CIELAB are based on mathematical models, and
are device-independent—they are not based on
the color response of a particular device.
Colorant
An ink, die, toner, paint or other pigment that
modifies the color of what it is applied to.
Composite printer
Any printer that can print directly in color without
first creating color separations. A composite is an
early proof of a printing job.
Continuous tone
An image containing gradient tones.
Custom color system
A system of named color swatches that can be
matched on press using process or spot colors.
PANTONE and TruMatch are examples of custom
color systems.