Ink Rub-off?

View attachment Ink Issue.pdf

Has anyone had the attached issue pop up before? We have really been struggling to find out the root cause of the issue. It appears the ink isn't drying properly and is rubbing somewhere, however there isn't anything that would be consistent with these marks. If we run it through our folder or stitcher the marks don't seem to be in-line with the equipment. None of our press pulls or samples that we keep have these marks, so I'm a little confused. By the time it reaches our client, the marks are there...seems like it is happening in shipping, but there isn't any ink transferring to the piece on top of it. ???

 

No ideas? If you scroll down on the PDF, you will see some better examples. It tends to be along the edges.

 

Very odd, it might be from the corrogute boxes, rubbing off during transport