Galley Proof: A proof of text copy before it
is formatted for the page.
Gamut: Every color combination that is
possible to produce with a given set of colorants on a given
device or system.
GIF: Graphics Interchange Format. A
compressed graphics file format patented by Unisys, and widely
used in the online environment.
Gradation: In photographic originals and
lithographic reproductions, the range of tones from the brightest
highlights to the deepest shadows.
Grain: In paper it is the direction in which
the paper will fold the easiest. It becomes very apparent in
cover weights of stock.
Graphics: Primarily photos and illustrations.
There are three types, vector, rastor, and bitmap.
Gray scale: The spectrum, or range of the
shades of black and image has. Also what an image is called when
it is converted from color to black and white.
Gray Value: The number (usually between 0 and
256) that specifies a particular shade of gray.
Gripper Margin: The margin at the lead edge
of the sheet that is needed in order for gripper to pull the
sheet through the press. Usually 3/8 to 1/2 inch.
Gutter: The two inner margins of facing pages
of a publication.