Correct imposition minimizes printing time by maximizing the number of pages per impression, reducing cost of press time and materials. To achieve this, the printed sheet must be filled as fully as possible.
Imposition is affected by five different parameters:
- Format of the product: The size of the finished page determines how many pages can be printed on a single sheet.
- Number of pages of the printed product: The compositor must determine how many sheets are to be printed to create a finished book.
- Stitching/binding method: The compositor must understand how the sheets are placed to form the signatures that compose the finished book.
- Paper fiber direction: Many papers have a "grain," reflecting the alignment of the paper fibers. That these fibers must run lengthwise along the fold influences the alignment, hence the position, of the pages on the printed sheet.
- Finishing and binding
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