Printing Glossary - Letter G

Within the trade, gang printing refers to The process of grouping similar or related jobs with the same paper and inks. It concerns the properties or grades of the paper stock.

Gatefold — A four-page insert which has foldouts on both sides of a center spread. It is a standard concept in printing.

GATF means Short for Graphic Arts Technical Foundation. It is a standard concept in printing.

Gathering describes The process of collating folded signatures in consecutive order. It relates to book assembly and durability.

GCR can be defined as Short for Gray Component Replacement. It is a standard concept in printing.

Gear Streaks means Parallel streaks which appear across a printed sheet at the same time as the gear teeth on a cylinder. It is a standard concept in printing. Usage varies with process and material.

Generation commonly denotes A succeeding stage in reproduction from an original copy. It is a standard concept in printing.

Genuine Watermark is A watermark that is made with a dandy roll. It is a standard concept in printing.

Technically, ghost halftone describes A light halftone which may be overprinted with a solid copy. It belongs to file preparation and imaging before printing.

Ghosting describes unwanted images that reduce print value. It includes both the mechanical and chemical ghosting. It is a print fault to be identified and avoided.

Technically, gild describes Covering trimmed edges of a book with gold or any other metallic leaf. It is a standard concept in printing.

Technically, glass describes A brief or magnifying glass. It is a standard concept in printing.

Gloss Ink refers to An ink which contains extra varnish quantity. It tends to give a glossy appearance when dry. It affects drying, adhesion, and print appearance.

Glued-On Cover means A cover that is fastened to the text with the use of glue. It is a standard concept in printing.

Gluing Off commonly denotes A process where glue is applied to the spine of a book in order to be case bound right after sewing and smashing, just before trimming occurs. It is a method of producing printed images. Each process has distinct plate, ink, and substrate demands.

Grade is The classification assigned to paper due to certain characteristics such as opacity, brightness, cotton content, etc. It concerns the properties or grades of the paper stock. Selection affects stiffness, opacity, and printability.

Grain Direction commonly denotes The direction of fibers in a paper. It concerns the properties or grades of the paper stock.

Grain Long — A term used to identify the grain of paper that is parallel to the measurement of a sheet paper. It concerns the properties or grades of the paper stock.

Grain Short means The opposite of grain long. It concerns the properties or grades of the paper stock.

Grainy Printing describes Printing characterized by halftone unevenness. It concerns the properties or grades of the paper stock.

Within the trade, grammage refers to The basic weight of A paper that is expressed in grams per square meter g/m. It concerns the properties or grades of the paper stock.

Graphic Designer is An individual who puts text, art, and other visuals to send a message and produce professional printed results. It is a standard concept in printing. Usage varies with process and material.

Gravure: when an image area is etched below the surface of the printing plate in an intaglio printing process. It is then transferred directly to the paper by means of pressure. It concerns the properties or grades of the paper stock. Selection affects stiffness, opacity, and printability.

Technically, gray balance describes The dot values of cyan, yellow and magenta in producing a neutral gray. It is a standard concept in printing.

Within the trade, gray level refers to The number of gray densities which can be distinguished with the use of a CPR separation filter. It is a standard concept in printing.

Gray Scale: Standard gray tones strip which ranges from white to black and placed at the side of original copy for tonal range and contrast measurements in photography. It is a standard concept in printing. Usage varies with process and material.

Gripper: A row of clips in charge of holding a sheet of paper as it speeds through a press. It concerns the properties or grades of the paper stock.

Gripper Edge refers to The leading edge of a sheet as it goes through the printing press. It is equipment used for production or quality control.

Gripper Margin is An unprintable back edge of a paper on which grippers bear. It concerns the properties or grades of the paper stock.

Gross Weight refers to The entire weight of merchandise plus a shipping container. It is a metric used for setup or quality evaluation.

Groundwood can be defined as A paper made from pulp which has been created in one of the many processes where almost all of the tree is used. It retains lignin and causes the paper to be yellow and deteriorate quickly. It concerns the properties or grades of the paper stock. Selection affects stiffness, opacity, and printability.

Guide Edge is The edge of a printed sheet which stays at the right angle to a gripper edge and travels along with the press or folder. It is equipment used for production or quality control. Calibration is essential for reliable results.

Guide Marks describes The technique of indicating trim, centering of the plate, centering of a sheet, through a cross-line mark on offset press plate. It is also known as register marks. It is equipment used for production or quality control.

Guide Roller means Also known as a cocking roller, it is located on the roll stand just between the dancer roll and the roll of paper. It concerns the properties or grades of the paper stock. Selection affects stiffness, opacity, and printability.

Guide Side commonly denotes The side of a press which guides the sheet to the exact side towards the operator. It is also known as a control side or operator. It is equipment used for production or quality control. Calibration is essential for reliable results.

In print practice, guillotine means A device used in cutting or trimming stacks of paper to the size of choice. It concerns the properties or grades of the paper stock.

Gum Streaks: Steaks that are made by uneven gumming of plates which desensitizes the image partially. Especially common in halftone. It belongs to file preparation and imaging before printing.

In print practice, gumming means A process in platemaking where a thin coating of gums is applied to non-printing areas of a lithographic plate. It affects drying, adhesion, and print appearance.

In print practice, gutter means The blank space on a press sheet from the printing area to the binding. It relates to book assembly and durability.