Gamma
Gamma is the graphical area the abbreviation for gamma correction, a non-standardized method of measurement of contrast for scanners, monitors and photographic materials.
Lexicon
Gamut
The gamut (also colour gamut) refers to the range of all colours in a colour space that can be recognised (camera, scanner) or reproduced (printer, monitor) by a device.
It is visualised in the form of a colour solid.
Gamut mapping
The conversion of colour values from one colour space (e.g. sRGB on the monitor) to another colour space (e.g. CMYK in print) so that the colour reproduction remains as consistent as possible.
GC1
GC1 refers to a coated primary fibre board (chromo board) in packaging printing.
GC2
GC2 refers to a coated primary fibre board (chromo board).
GCR
Gray Component Replacement is a variant of the color build-up in printing.
GD1
GD1 designates a coated secondary fibre board, insert and back grey
(chromo duplex board), top side wood-free white, with special volume (> 1.45 cm³/g).
GD2
GD2 designates a coated secondary fibre board.
GD3
GD3 refers to a coated secondary fibre board.
GGZ
GGZ designates a cast-coated, fully bleached cellulose board in packaging printing.
GMG
GMG ColorServer is a company based in Tübingen, which has made a name with the development of color management software. For over 25 years GMG has been developing anything from printer drivers to complex Proof software.
GOE
2007 PANTONE introduced the GOE color system with more than 2,000 colors, which was originally intended to replace the Pantone Matching System PMS. It was discontinued in February 2014 by Pantone and no longer exists in the market.
Gradient
A colour that usually goes from saturated to less saturated over an area.
The gradient can also run from one colour to another, or several colours.
Gravure Printing
Gravure printing is one of the oldest printing processes that is still used today.
The print image is engraved into the printing cylinder (or printing plate). It is then dipped into the ink and the excess ink is scraped off, leaving only the ink in the depressions (cells). Finally, this ink is transferred to the printing substrate using high pressure and the absorbency of the paper.
Grey balance
Grey balance is the ratio of the base colours (process colours) CMY (cyan, magenta, yellow) in four-colour printing, through which an optically neutral grey is achieved.
GT
GT refers to a coated secondary fibre board.
GTI
The GTI GmbH is beside Just Normlicht a renowned manufacturer of standard light tubes and standardized light consoles and colour cabins.
GTIN
The Global Trade Identification Number is synonymous with 8- and 13-digit bar code.
GZ
GZ refers to a coated, bleached pulp board in packaging printing.