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Glossary of Printing and Graphic Arts Terms - Section G
Glassine
A smooth dense semi-transparent paper. Sometimes used as window patch material, but losing popularity compared to the new poly-styrene materials which are more transparent and less sensitive to moisture. Glassine is biodegradable and recyclable.
Grain Direction in which most of the fibers lie in a finished sheet of paper. Paper folds more easily with the grain. It offers greater resistance to being torn across the grain, and demonstrates greater tensile strength in the direction of the grain.
Gripper Edge The leading edge of paper as it passes through a printing press or folding machine. No printing can take place on 3/8" of the paper on the gripper edge. Referred to as a “common edge” when jogging a stack of paper.
Guide Edge The side of a printed sheet from which copy registers left to right. This is the second “common Edge”.
Guide Marks A method of using cross line marks on the offset press plate to indicate trim, centering of the sheet, centering of the plate.
Gum An adhesive made with a plant base to seal paper envelopes. Some gums take moisture to seal, others such as latex gums will adhere to themselves.
Ghost
When an image is screened back or shaded down in intensity, it is called a ghosted image. Both full-color and black and white images can be ghosted.
Graphic Accents
Graphic Accents emphasize and organize words, illustrations and photographs. Boxes, drop shadows, indents, lines, rules, screens and icons are considered graphic accents.
Gray Scale
When an image has “shading” or “screening” it is referred to as a gray scale image.
Grid
A grid is the defining of headline positions, column length and width, placement of headers and footers and and any other predetermined placement of photographs or graphic elements on a page. A series of nonprinting horizontal and vertical rules assist in creating and maintaining a grid for page layout.
Gutter
Gutters are the white spaces which appear between columns of type. Gutter widths should be wide enough to clearly define columns and narrow enough to not lose the reader.
