Overprint

Overprint is a fundamental process in commercial printing where two or more ink layers are applied to the same area of the substrate. This occurs naturally when printing in CMYK, as the cyan, magenta, yellow, and black inks must overlap to create a full spectrum of colors. The term specifically refers to the intentional or controlled application of these overlapping inks.

In practice, overprint ensures that colors remain uniform and dense, preventing gaps that might appear if inks were applied sequentially without overlap. It is critical for maintaining visual consistency across large print runs. Printers manage overprint settings on their presses to control how inks interact, ensuring that the final output matches the digital proof. Proper management prevents issues like muddiness or unexpected color shifts, which are common in subtractive color mixing.