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Glossary 189
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.
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.
Held job
A job for which the appropriate paper stock is not available, for
example, the correct paper type, paper size or paper weight.
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
.