Galley Proof
Proof of type from any Source, whether metal type or photo type. Also called checker and slip proof.

Gate Fold
A sheet that folds where both sides fold toward the gutter in overlapping layers.

Gathered
Signatures assembled next to each other in the proper sequence for binding, as compared to nested. Also called stacked.

Ghosting
(1) Phenomenon of a faint image appearing on a printed sheet where it was not intended to appear. Chemical ghosting refers to the transfer of the faint image from the front of one sheet to the back of another sheet. Mechanical ghosting refers to the faint image appearing as a repeat of an image on the same side of the sheet. (2) Phenomenon of printed image appearing too light because of ink starvation.

Gloss
Consider the light reflecting on various objects in the printing industry (e.g., paper, ink, laminates, UV coating, varnish).

Gloss Ink
Ink used and printed on coated stock (mostly litho and letterpress) such as the ink will dry without penetration.

Grade
General term used to distinguish between or among printing papers, but whose specific meaning depends on context. Grade can refer to the category, class, rating, finish or brand of paper.

Graduated Screen Tint
Screen tint that changes densities gradually and smoothly, not in distinct steps. Also called degrade, gradient, ramped screen and vignette.

Grain Direction
Predominant direction in which fibers in paper become aligned during manufacturing. Also called machine direction.

Grain Long Paper
Paper whose fibers run parallel to the long dimension of the sheet. Also called long grain paper and narrow web paper.

Grain Short Paper
Paper whose fibers run parallel to the short dimension of the sheet. Also called short grain paper and wide web paper.

Grammage
Basis weight of paper in grams per square meter (gsm).

Graphic Design
Arrangement of type and visual elements along with specifications for paper, ink colors and printing processes that, when combined, convey a visual message.

Graphics
Visual elements that supplement type to make printed messages more clear or interesting.

Gravure
Method of printing using metal cylinders etched with millions of tiny wells that hold ink.

Gray Balance
Printed cyan, magenta and yellow halftone dots that accurately, reproduce a neutral gray image.

Grind Edge
Alternate term for binding edge when referring to perfect bound products.

Grindoff
Approximately 1/8 inch (3 mm) along the spine that is ground off gathered signatures before perfect binding.

Gripper Edge
Edge of a sheet held by grippers on a sheetfed press, thus going first through the press. Also called feeding edge and leading edge.

GSM
The unit of measurement for paper weight (grams per square meter).

Gutter
In the book arena, the inside margins toward the back or the binding edges.