A perfecting press is a press that prints both sides of a sheet in one pass. As an example, a two-color press that can perfect may print black on both sides of the sheet, or it may print a PMS color on both sides of the sheet. It may also print different colors on the two sides of the press sheet. The key is that both sides are printed at once.

This process becomes particularly useful on a multi-unit presses, such as our eight-color Heidelberg Speedmaster XL-106. This press can print four process colors on each side of the sheet at the same time. An example of a good project for this press is a sixteen-page process-color booklet (eight pages on each side of the press sheet receiving four colors as the sheet passes through the press). The pressman prints both sides of the sheet in a single pass, completing the whole job in a fraction of the time required by a conventional press. This saves both time and money while achieving better color quality than presses requiring two passes.

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