In the last post we discussed about the difference in CMYK and RGB Colorspace. RGB is an additive colorspace and is primarily used to display colors on our monitors and computer screens. CMYK on the other hand is a subtractive colospace and is used to produce colors in the real world. For example our printers use CMYK colospace to print our pictures and photos while our monitors use RGB profile to display the pictures.
CMYK is a color model in which all colors are described as a mixture of these four process colors. CMYK is the standard color model used in offset printing for full-color documents. Because such printing uses inks of these four basic colors, it is often called four-color printing.