4 color process printing involves the use of four plates: Cyan, Magenta, Yellow and Keyline (Black). The CMYK artwork (which you will have supplied) is separated into these four colors – one plate per color. The four CMYK inks are applied one by one to four different rollers and the paper or label stock is then fed through the printing press. The colors are applied to the stock one by one, and out comes the full color (4 color process) result.
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