Its hard to see. Is it magenta? Are you running it SEF? Does it happen on a lighter stock? Is it the correct grain?
Hei,
I know its hard to diagnose , but maybe Any ideas/experience about this defect sample. Paper 300g, coated A4, printing face down?
Original size:
http://postimg.org/image/71744e0y5/
Greetings,
