C, M, Y and K are the four primary colors commonly used in printing. When printing primary colors, each of the four colors has its own color plate, which records the dot of this color. The dot is generated by the halftone screen, and the combination of the four color plates forms the defined primary color. Adjust the color plate dot size and spacing can form other primary colors. In fact, the four printing colors on the paper are separated, but they are very close to each other.
