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G

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.

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