Abbreviations used in aviation forecasts and warnings. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z.
Rich Black. ich Black is used to refer to a mixture containing the four process colors: cyan, magenta, yellow, and black (CMYK) colors. This is necessary because no black ink is truly black, and the combination of the four inks will result in a denser black, or ârich black.â The printing industry has many definitions of rich black.
1 Scanners, digital cameras and computer monitors use red, green and blue (RGB) light to display color. 2  Commercial printing presses print with cyan, magenta, yellow and black (CMYK) ink, called process printing, instead of RGB light, and therefore produce a different range of color.