The cost of these alterations is paid by the client, in contrast to any errors by the printer, which are corrected at no cost to the client. Copy may bleed off the top, bottom, or sides of the printed piece. Bleeds cost slightly more than non-bleed designs because extra paper must be used, and primed off after printing. An inexpensive proof made directly from the printing film by contacting with a special coated paper which is then developed in an ammonia vapor. Blueline proofs are usually used to check the order of pages and position of items on a job ready to go to press.
Process color is necessary to reproduce color photography.
Four screens, one for each color, are printed over each other sequentially to create the range of tones in full color. Percentages of these four primaries can be used to build a CMYK equivalent to a Pantone color, however, not all colors can be matched exactly. Paper in both text and cover weights that are available with a coated finish commonly used when color photography is going to be printed on the paper. Used to check that electronic information has transferred to the vendor correctly, insuring that typefaces have not defaulted, or that graphics and photos are placed and cropped correctly. Color cannot be accurately represented with this kind of method.