How to process the Ghent Output Suite 4.0 using Apogee Prepress 8.0
The Ghent Output Suite is created by the GWG or Ghent Workgroup, an international organization made up of graphic arts users, associations & developers building best practices for publishing workflows. The Ghent Output Suite is created for users in the graphic arts industry who regularly process PDF files. The set of test patches helps them determine if their workflow processes PDF/X based documents properly. In today's complex digital prepress environments, application settings and RIP settings can have a significant effect on the end results for printed materials.
This document describes how to process the Ghent Output Suite using Apogee Prepress 8, the prepress workflow solution of Agfa Graphics. The suite can be downloaded from the GWG web site.
To learn more about Agfa workflow solutions please visit the Apogee Prepress product page.
The following components are needed to process the test patches of the Ghent Output Suite:
- Apogee Prepress 8.0 (build 1.50.2)
- Essential Fixes 1, 2 and 3 (These can be installed using UpdateManager)
- Version 8.0.11 or later of the Apogee Preflight action ap_Fix PDFInconsistencies.
Apogee job ticket settings
The production plan below and the highlighted settings are recommended for processing the Ghent Output Suite.
Click the image to enlarge
There are 2 crucial sets of parameters that need to be set correctly:
- The PDFRender Task Processor must be preceded by the Apogee Preflight Task Processor. The latter must make use of the ap_FIX PDFInconsistencies v.8.0.11 (or higher) action list.
- For the PDFRender Task Processor the CMS setting must use the mode 'Document Based', without any output color conversion.
Apogee Preflight settings
Why is it necessary to use the 'ap_FIX PDFInconsistencies' action list?
Objects in a PDF file can have a different rendering behavior in the workflow (depending on the production settings) compared to the result in PDF viewers (Acrobat, etcâ¦). The rendering behavior is influenced, among others, by separate job settings (keep - convert) or image settings. To overcome this, it is sometimes necessary to inspect the PDF file and solve any ambiguous PDF constructs before rendering the data.
Other Apogee Preflight settings
To process the Ghent Output Suite correctly, there is no need to use an Apogee preflight profile.
The Ghent Output Suite can be rendered with either 'Convert' or 'Keep' policies for the included spot colors. Since Apogee Preflight controls Emulate Overprint it is important that you don't change the default setting 'Automatic'.
Render - Color Management settings
The PDF/X standards clearly document how objects within a PDF can be defined in terms of color settings and how consuming software should apply color conversions on the objects with the PDF. In this step it is crucial that the output intent profile serves as a destination profile. Ideally it should be the same as the actual press profile. To enable correct processing by the PDFRender Task Processor it is advised to use 'Document based CMS' mode because this guarantees that the PDFRender Task Processor converts the input document correctly to the document output intent. The Input Color Conversion honors all the embedded attributes, such as color profiles, overprint settings, transparencies, layers (more precisely PDF optional content groups - OCG).
The above production plan shows the recommended CMS settings.
The use of 'Document based' CMS ensures that all these attributes behave as expected by the designer. The result can be compared to the visual result of Adobe Acrobat Pro with 'Simulate Overprint' enabled (Tools\ Output Preview).
The screen captures below shows the results of using correct rendering settings in Apogee Prepress 8.0.