Galley Proof 

Proof of type from any Source, whether metal type or photo type is also called checker and slip proof. 
To halftone or separate more than one image in only one exposure. To reproduce two or more different printed products simultaneously on one sheet of paper during one press run. 
Gate Fold 
A sheet that folds where both sides fold toward the gutter in overlapping layers. 
Signatures assembled next to each other in the proper sequence for binding, as compared to nested is also called stacked. 
Ghost Halftone 
Normal halftone whose density has been reduced to produce a very faint image. 
(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. 
Mostly in the book arena, gold leafing the edges of a book. 
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. 
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 is also called as machine direction. 
Grain Long Paper 
Paper whose fibers run parallel to the long dimension of the sheet is also called long grain paper and narrow web paper. 
Grain Short Paper 
Paper whose fibers run parallel to the short dimension of the sheet is also called as short grain paper and wide web paper. 
Basis weight of paper in grams per square meter (gsm). 
Graphic Arts 
The crafts, industries and professions related to designing and printing on paper and other substrates. 
Graphic Arts Film 
Film whose emulsion yields high contrast images suitable for reproduction by a printing press, as compared to continuous-tone film is also called as litho film and repro film. 
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. 
Visual elements that supplement type to make printed messages more clear or interesting. 
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. 
Gray Component Replacement 
Technique of replacing gray tones in the yellow, cyan and magenta films, made while color separating, with black ink. Abbreviated GCR. Also called achromatic color removal. 
Gray Levels 
Number of distinct gray tones that can be reproduced by a computer. 
Gray Scale 
Strip of gray values ranging from white to black. Used by process camera and scanner operators to calibrate exposure times for film and plates. Also called step wedge. 
Grind Edge 
Alternate term for binding edge when referring to perfect bound products. 
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. 
Groundwood Paper 
Newsprint and other inexpensive paper made from pulp created when wood chips are ground mechanically rather than refined chemically. 
The unit of measurement for paper weight (grams per square meter). 
In the book arena, the inside margins toward the back or the binding edges. 


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