It doesn’t happen very often but sometimes the content of pages, such as large flat tints or dark images, require a change in the imposition template to make the job easier to print.Ĥ. The compositor must determine how many sheets are to be printed to create a finished book. The number of pages of the printed product The ability to print 8 A4 or Letter size pages in one go is called an 8-up. Page and sheet size On a press capable of printing on SRA1-sized sheets, which measure 640×900 mm, you can put 8 A4-size pages.
How many pages are combined, how these are positioned and which additional information is added to the signature is determined by many parameters:ġ.
An imposition scheme determines how those pages will be positioned on the signature. The example below shows an imposition scheme that can be used for imposing 8 A4 pages on an SRA1 sized sheet. Imposing signaturesįor multipage documents such as magazines or brochures, all the pages are combined in signatures, which are printed sheets that are folded to the required page size. Imposition for commercial jobsĬommercial printing includes producing catalogs, magazines, brochures, leaflets, flyers, stationery, business cards as well as posters and billboards. All these production-related graphic elements are called the furniture. This includes cutting marks, color bars and collation marks. Part of the process is making sure that all the marks that are needed by the printing presses and finishing machines are added.
What is common for all three types of work is that the imposition work is not limited to positioning pages or artwork on a sheet. That means imposition is also handled differently for commercial, newspaper and packaging jobs. It is a fundamental step in preparing a job for print and it requires a lot of insight in the way the entire production process works. Imposition refers the prepress process of positioning pages or artwork on press sheets in such a manner that the job can be printed and finished properly and efficiently. In one single go a press may print 4, 16 or even 96 pages. To lower costs and improve productivity printing presses do not print a single page or artwork at the time.
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