Job Definition Format - JDF For Printing Proofing - Combined Processes For Proofing

Combined Processes For Proofing

It is impossible to describe proofing by a unique combination of processes which in turn will depend on the capabilities of the RIPs (Raster image processor), the devices used for proofing and the proofing production workflow. It is still possible to define a generic combined process for the proofing. This will allow it to describe its step in a workflow. The generic combined proofing process combines the following JDF processes:

• ColorSpaceConversion (1): converts the contents of the input RunList from the input color spaces to the color model of the press.
• Interpreting: interprets the input RunList file(s) and converts them to an internal display list in order to go through the Rendering.
• Rendering: renders the raster data.
• ColorSpaceConversion (2): converts the data from the press color model to the proofer device color model.
• Screening: screens the raster data.
• Imposition: if imposition proofing is done, combines the pages and marks on the imposed sheets.
• ImageSetting: specifies the actual printing of the proof. Depending on the characteristics of the proofing device DigitalPrinting can be used as well.

The ordering is not completely strict (same result may be achieved with different order combination of steps), but there are some precedence rules: the first color space conversion must be done before the second one, rendering must be done after interpreting, screening in turn must be done after rendering and the second color conversion, ImageSetting/DigitalPrinting must be done after screening.