What is Process Printing?

Also called "4-color process printing," process printing refers to the technique of printing a full spectrum of colors using halftones of only 4 ink colors layered over each other: Cyan, Magenta, Yellow, and Black (or, CMYK). These 4 transparent ink colors can be used in combination, with varying degrees of transparency, to create any color. This process works best on light-colored shirts, like white or natural, because the transparent CMYK inks tend to pick up the hue of the shirt underneath them.