For presses that require a minimum ink coverage per separation, the ink eater mark places a bar on the sheet to remove extra ink from the rollers.

The bar is used to constitute the minimum ink coverage that is required for each separation on a press. Prinergy determines the amount of ink used by content for each pixel column and adds an amount of ink that fulfills the minimum requirement to the specified ink eater bar area. Typically, ink eater bars are placed in the gutter along the width of the sheet.

The Prinergy ink eater mark is calculated on the fly. It takes all other marks into consideration to provide the most accurate calculation of the ink coverage. Also, the Prinergy ink eater mark is smoothed, so that hard edges are not visible between pixel columns.

The ink eater mark has the following format:

$[InkEater_<minx>_<minY>_<maxX>_<maxY>_<minDensity>_<maxSaturation>_<colors>]

This is a sample fully-populated mark: $[InkEater_5_185_706.2_215_7_180_CMYK1] 

Tip: You can place more than one ink eater bar. This is useful if you need to place other marks in the gutter. Also, it may be useful to create one ink eater bar per color.

For the mark $[InkEater_5_185_706.2_215_7_180_CMYK1], see the following before and after figures.

 

  


Limitations

Performance testing estimates additional processing time of approximately 10 to 20 seconds per plate in cases where an ink eater mark is included.
Output to composite output (example, contone TIFF) does not work because the mark is designed to work on separated data. The Marks JTP fails in this case. This limitation dictates that users of this mark should take either of the following actions:

Use of this feature with pre-separated PDF pages will cause processing to fail.
Use of this feature with legacy versioning jobs will result in incorrect output.