Oki C 9400 User Manual Page 329

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Working with Color
Glossary
Additive Primaries
Red, Green and Blue (RGB) are the additive primaries and the basis for forming other colors in
displays such as computer monitors or televisions.
Brightness
The relative lightness or darkness of a color, is usually measured as a percentage from 0%
(black) to 100% (white).
CIE
In 1931, the Commission Internationale de l’Eclairage (CIE) devised a color system based on
the human visual system which is now an accepted standard. This system is not linear and is
therefore difficult to interpret. There have been modifications to the system that have given rise
to CIELab and CIELuv.
Cluster-dot Screening
This is a halftoning method that uses multiple pixels that vary from small to larger dots as the
color gets darker. It is characterized by a polka-dot look.
CMY(K)
Cyan, magenta, yellow and black are the toners used in the four color print process. Due to the
imperfections in toners, black is added rather than produced by mixing the other three inks.
Black is identified as ‘K’ to avoid confusion with other colors such as blue.
Color Gamut
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