Dry Offset Screening

With this node you can update a set of TIFF files for Dry Offset printing.

This means that any overprinting separations will be removed, so at any pixel there is only one separation that is printing. Optionally, you can make sure that two different printing separations do not touch each other.

The node has the following configuration options:
  • TIFF Files: here you can define the TIFF files you want to process. Select the pencil to open Expression Builder.
  • Processed Files: here you can specify the name to assign to the processed TIFF files. Options:
    • If you leave this parameter blank, the original files will be overwritten.
    • If you define an absolute CLOUDFLOW URL containing a filename (cloudflow://..., see Server URL for more information), an output file with the specified file name will be written in the specified folder.
    • If you define an absolute CLOUDFLOW URL without a filename (cloudflow://..., see Server URL for more information), an output file with the original file name will be written in the specified folder.
    • If you enter a relative path containing a file name, an output file with the specified file name will be written in the specified folder based on the original input folder.
    • If you enter a relative path without a file name, an output file with the original file name will be written in the specified folder based on the original input folder.
  • Overwrite existing file: if you select this checkbox, files that already exist will be overwritten. If you leave this checkbox unselected, existing files will not be overwritten and an error is displayed.
  • Keep Away Distance: here you can define the distance that should kept clear between two different separations. If you do not need to keep a distance, set the value to 0.
  • Sort Separations: here you can define how the separations should be ordered for processing. Options:
    • Darkest Separation First: if you select this option, the color found in the TIFF files will be used to sort the separations from dark to light, and the darkest separation will be on top.
    • File Order: if you select this option, the separations will be processed as specified in the TIFF Files parameter, which means that the first file will be on top.
    • Inverted File Order: if you select this option, the separations will be processed in the opposite order as specified in the TIFF Files parameter, which means that the last file will be on top.
  • Ignore Separations: here you can specify the separation(s) you want to exclude from the dry offset screening. You can use a Regular expressions and match more than one separation. If you do not want to exclude separations based on their name you can leave this parameter blank.
    Note: You can use https://regex101.com as an online regex tester.
  • Ignore Technical Separations: if you select this checkbox, all separations of type technical are excluded from the dry offset screening. If you leave this checkbox unselected, separations are not excluded based on their type.
  • Marks Separation: here you can specify a separation that only contains marks. Other separations will not be modified (at all) where the marks separation contains on-pixels. This can be used to make sure that registration marks are not erased even though they are overprinting. If you do not have/need a special marks separation you can leave this parameter blank.
  • Keep Away Separation: here you can specify the separation you want to use to get keepaway feedback. That is, all the pixels where in the input one or more separations were turned on and in the final result all separations are turned off by the dry offset screening will be marked in the specified separation. If you do not want/need this information, you can leave this parameter blank.
Note: You can set the Info Separation and Marks Separation to the same value if you want/need.