What Does Cyan-Magenta-Yellow-Black Printing Mean?
Cyan-magenta-yellow-black (CMYK) printing is a printing technique used by most color printers. Each color visible to the human eye can be described as a combination, in different ratios, of these four colors; a CMYK printer uses only these four colors to print any color on a document.
Cyan-magenta-yellow-black printing is also known as four-color printing or process color printing.
Techopedia Explains Cyan-Magenta-Yellow-Black Printing
Cyan-magenta-yellow-black printing is a printing standard used in most color printers. A CMYK model is a pigment model whereby cyan, magenta, yellow and sometimes black are the primary pigments. All other pigments are made from the combination, in varying amounts, of these basic pigments. A tool for desktop publishing is used that matches the RGB display color to its corresponding CMYK value so the printed copy is the same as the displayed color.