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Cromalin is a proof printing process introduced by DuPont in the 1970s. A Cromalin proof is produced by successive exposures in layers on film, which is then laminated onto special paper.
Today, Cromalin no longer plays a role in proof production; it has been completely replaced by the cheaper and faster digital proof.
The removal of the background or insignificant elements from an image in order to perform image montages or to increase the optical effect.
Lines printed at the corners of the page to mark the final size of the design. The page is cut along these marks.
Also referred to as: trim marks, cut marks, crop margins.
The CropBox is the second largest box of a PDF file. It describes the part of a PDF file which is to be output to a printer or screen. It is often the same as the Mediabox.