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Glossary 253
Frame
A color overlap created intentionally at a color border so as to
minimize the effects of misregistration. Also known as trap or grip.
See also Trapping.
Frequency modulated screens
A method of creating halftones where the spots are all the same size,
but the frequency or number of dot changes in a given area. There are
more dots in a dark area and fewer in a light area.
Frozen job
A job for which the appropriate paper stock is not available, for
example, the correct paper type, paper size or paper weight.
GCR
Abbreviation for Gray Component Replacement. Method for
reducing the CMY amounts that produce the gray component in a
color, without changing the color hue.
Graduated blend
See Degradé.
Gravure printing
A printing method in which the image is engraved through a screen
below the surface of a cylinder. The ink is transferred to paper when
pressed to the cylinder. Gravure is used for very long print runs and
on many substrates.
Gray component
The amounts of CMY in a color, which result in neutral gray, based on
the lowest separation value of the color. See also GCR.
Grayscale
A scale of gray tones from white to black. Digitally, grayscale images
have up to 256 different levels of gray. See also 8 bit/1 byte image.
Halftone
A negative or positive image whereby detail of the image is
reproduced with dots varying area but of uniform density. Creates the
illusion of continuous tone when viewed with the naked eye.
Highlights
The whitest portions of the original or reproduction that have no
color cast. The highlight dot is ranged in the reproduction from the
smallest printable dot to approximately 25%. See also Midtones and
Shadows.
HSL
Abbreviation of Hue, Saturation and Lightness. This is a color model,
which specifies a color by its wavelength (Hue), chroma or purity of
the color (Saturation) and value of its brightness (Lightness).
Image area
Portion of a negative or plate corresponding to inking on paper. The
portion of paper on which ink appears.