Progressive Proof

A set of color proofs produced on-press using the four color separation negatives exposed to separate plates and printed in printing sequence using the process inks intended for the pressrun. A set of progressive proofs (commonly known as progs) is likely to include the following: the yellow plate alone; the magenta plate alone; a combination of yellow and magenta; cyan alone; yellow, magenta, and cyan in combination; black alone; and all four colors in combination, or the full-color image. Progressive proofs are a preferred way of checking the color separation negatives, and are also used—by referencing them to press sheets—to maintain press control during the press run.

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