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Cromalin is a proofing production method, developed by DuPont in the 70s. The production of Cromalin proofs are done by layers of successive exposures on film which are then laminated onto special paper.
Today Cromalin are no longer important in the production of proofs. It wasi completely replaced by cheaper and faster digital Inkjet proofing.
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.