PDF Options Window
Using the Configurations/PDF tab, the overprinting properties and transparent elements can be changed and the optimized or color-converted PDF files can recieve PDF/X-specific information.
The PDF/X-specific information is useful if ZePrA is used for generating printing data. The PDF/X entries tell the print shop receiving the PDF/X data which printing standard the PDF/X files supplied were optimized for.
ZePrA supports the following PDF/X standards:
Transparency Overprinting Settings
Overprinting properties and transparent elements can be adjusted and specific information can be given to the optimized or color converted PDF files.
With the adoption of PDF/X-4 files and the trend toward creating files with transparencies in the creative sector, the number of PDF files with transparencies has increased. There may occasionally be a conflict between color conversion and transparencies. ZePrA provides the ability to achieve the desired results through Transparency Flattening.
Preserve Overprinting Effects
The Preserve Overprinting Effects checkbox results in automatic adjustment of overprinting properties. Some overprinting effects may be lost when changing the color space. This option ensures correct conversion of colors to the the best way possible. Preserve Overprinting Effects is enabled by default if transparency reduction is not performed.
Convert All Transparent Elements in PDF Files
Transparent objects in PDF files contain not only the actual transparency effect, but also a color space and color values. As standard, ZePrA converts all transparent objects the same way as all other color objects, even if transparency reduction is not applied. This may lead to visual errors when certain transparency effects have applied. If an error occurs, turn off Convert All Transparent Elements in PDF files. Color transparencies will be converted correctly and individual effects having no relevant color will be excluded.
Tip: Both the option to Preserve Overprinting Effects and the option to Convert Transparent Elements are unavailable when using Transparency Flattening.
ZePrA can utilize PDF/X data when processing print ready PDF files. The PDF/X specific information contains the print standard profile that can be communicated to the printing facility.
PDF/X Output Intent
The output intent is a color profile containing the printing color space for which the PDF file was created. The Embed Target Profile option in the drop down menu automatically embeds the target profile of the configuration as the output intent. Alternatively, a different profile can also be defined manually.
Output Intent PDF/X:
There are four options in the drop down menu:
Embed Target Profile: The default setting. The target profile will be embedded as the output intent
Embed Different Profile: Embed a different profile from the drop down menu
No Output Intent: Removes the output intent
Don’t change: Output intent remains as is.
Note: If a CoPrA Correction DeviceLink Profile has been selected in the Target Color Space section in the Document / Target tab and the Embed Updated Target Profile instead of the Target Profile option has been enabled, then this corrected target profile will be embedded as output intent.
Output Condition Identifier
The identifier stands for the colorimetric data on which the color profile of the output intent is based. This information is important because in some cases different suppliers offer profiles with different profile names. If a printer received PDF/X data from users who work with different profiles, the registered name can be used to see whether the profile in question is a profile for an industry standard or a customer profile.
Plain language description of the printing standard for which the PDF/X data was optimized.
Customer, job, printing process or file specific entries can be made under Information.
At www.color.org the ICC maintains a registry for colorimetric data and output conditions representing international printing standards. If a printing company works with numerous suppliers, it makes sense to agree on a name / output condition identifier registered with the ICC.
Importing PDF/X Information
If using the Import button to load a PDF/X file, ZePrA extracts the PDF/X information which means there is no longer a need to manually enter the information.
Tip: When using the ColorLogic DeviceLink Sets with the endings CoLoV3/V4/V5/V6, they contain information that is automatically entered in the corresponding fields for PDF/X information in ZePrA. No manual entries in the PDF/X information are necessary when creating queues via the Auto Setup Wizard and using ColorLogic DeviceLink Sets. Similarly, no manual entries are necessary when working with a target profile that ZePrA recognizes as a standard output profile.
Note: When creating DeviceLink profiles, use ColorLogic Profile Manager, which is part of the CoPrA profiling application, to easily make entries in the Workflow tab needed for automatic adoption of the PDF/X information in ZePrA. (image)
Tagging PDF Objects
When Tag PDF Objects (ICC Based) is selected the target profile is assigned to each object of the PDF file following color conversion. Use this option if PDF files are not PDF/X, but to ensure that the color information for images and vectors are correctly defined with the target profile. By default, Tag PDF Objects is disabled. It is recommended to leave this option disable and use it only when necessary.
Passwords in PDF files prevent data from being color converted. To remove password protection and be able to perform color conversion, enter the password in the PDF Passwords field.
For PDF files with numerous pages, specify which pages should be color converted and which should not be. Specify the pages individually if they all require different color conversion.
Convert all Pages: The default setting. Converts all pages in the PDF document
Convert Page Range: Convert specific pages of a multi-page PDF document. Enter the relevant page numbers or range.
Don’t Convert These Pages: Convert all pages with an exception of one or more selected pages.
Convert These Pages and Remove the Remaining Pages: Extract specific pages to be color converted and remove the rest
Remove These Pages and Convert the Remaining Pages: Remove specific pages and color convert the rest of the pages
Additional page selection rules can be selected in the dialog that opens when clicking the small arrow button on the right side. These option are beneficial if specific page numbers are not handy, or if only the First and Last Page are converted.
Enhance RIP Compatibility of Complex Graphical Elements
ZePrA converts all objects, including vector shading, with the high accuracy and 16-bit precision. For every shading created based on a function in the original file, it is necessary to use a very large LUT (look up table) to ensure a correct color transformation. Some RIPs (e.g. EFI Fiery and Global Graphic Multi RIP) have issues in handling 16-bit shading and large LUT’s. To avoid issues and to speed up processing time of certain RIPs, the option Enhance RIP Compatibility of Complex Graphical Elements can be used. This option is disabled by default in all existing configurations and for all new configurations created with Auto Setup Wizard. Activate this option whenever processing issues with a RIP after converting files with ZePrA occur.
Remove Private Data of other Applications
Ensures that private application data in PDF files is removed. For instance, such data can be stored optionally by Adobe Photoshop or Illustrator when saving files as PDF.
However, other programs can use so-called “piece information” in PDFs as well to place non-public application data in PDF files. This allows the subsequent opening and editing of the original file in the previously mentioned applications. However, for color converted files this application data can be misleading as it will not be converted. Reopening these files in the above mentioned applications will then only display the original but not the converted color information. Additionally, PDF files which contain piece information can be significantly larger. To obtain smaller files (without piece information after conversion of PDF files) select the function Remove private Data of other Applications.