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(graphic arts)
A color model that synthesizes all colors as combinations of cyan, magenta, yellow, and black; it begins with white, and subtracts the appropriate color to yield the desired color. Also known as CMY.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


cyan, magenta, yellow, key.

A colour model that describes each colour in terms of the quantity of each secondary colour (cyan, magenta, yellow), and "key" (black) it contains. The CMYK system is used for printing. For mixing of pigments, it is better to use the secondary colours, since they mix subtractively instead of additively. The secondary colours of light are cyan, magenta and yellow, which correspond to the primary colours of pigment (blue, red and yellow). In addition, although black could be obtained by mixing these three in equal proportions, in four-colour printing it always has its own ink. This gives the CMYK model. The K stands for "Key' or 'blacK,' so as not to cause confusion with the B in RGB.

Alternative colour models are RGB and HSB.
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(Cyan Magenta Yellow blacK) The color space used for commercial printing and most color computer printers. In theory, cyan, magenta and yellow (CMY) can print all colors, but inks are not pure and black comes out muddy. The black ink (K) is required for quality printing. See color space, RGB and ink coverage.

Colors Are Separated
Before printing, the image is separated into CMYK inks that blend together when printed. (Image courtesy of Intergraph Computer Systems.)

A CMYK Printer
Color laser printers use four toner cartridges. Unlike commercial printing, in which the page is printed four times, each of the four inks in a laser printer is applied to the drum, and then the page is printed.

CMYK Ribbon
This is a dye sublimation or thermal wax transfer ribbon where four panels of dye or wax-based ink exist for each page, and each panel is the size of the page. After printing a page, the ribbon is advanced to the next four-color set. See dye sublimation printer and thermal wax transfer printer.

CMYK and More
For greater color accuracy, some inkjet printers use more than CMYK. The Canon printer (top) adds a gray (GY) cartridge. The Epson (bottom) includes lighter versions of cyan and magenta. See PGBK.
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References in periodicals archive ?
Isothermal studies of adsorption of PNP onto RK, CYMK and CHMK
The value of Temkin constant b which is related to heat of adsorption were 174.42 J/mol, 162.12 J/mol and 118.47 J/mol for RK, CYMK and CHMK respectively.
Kinetics studies of PNP adsorption onto RK, CYMK and CHMK
Thermodynamic studies of PNP uptake onto RK, CYMK and CHMK
Cysteine modified kaolinite (CYMK) was prepared following the methods reported by Faghihian and Massoud [28].
XRD patterns of raw kaolinite; Insert (a) XRD pattern of CHMK; (b) XRD pattern of CYMK.
SEM micrograph of RK (a) CHMK (b) and CYMK (c); CHMK after PNP uptake (b1) and CYMK after PNP uptake (c1).
FTIR spectra of kaolinite clay mineral before PNP uptake (a) after PNP uptake (b); CHMK before PNP uptake (c) and after PNP uptake (d); CYMK before PNP uptake (e) and after PNP uptake (f).
Effects of concentration on PNP uptake onto RK, CYMK and CHMK [Adsorbent dose (2 g/L), agitation speed (130 rpm), agitation time (360 minutes), Temperature (27 [+ or -] 2[degrees]C), Adsorbate concentration (50 mg/L)].
Effects of contact time on PNP uptake onto RK, CYMK and CHMK.
Effects of pH on PNP uptake onto RK, CYMK and CHMK.
Effects of temperature on PNP uptake onto RK, CYMK and CHMK.