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Horizontal lines


 

Hi,
I am a printmaker in Amsterdam (the Netherlands)
Recently I purchased an Epson P6000 for DTP.
I use PrintTool, QTR 2.7.9 and Mac OS Mojave 10.14.6
At first I got small horizontal lines on the plate.
Walker advised me to re-install QTR as it could be stuck in 720 dpi.
I did so and the lines were gone.
But now I get wider banding (horizontal) in the black parts:


I tried several times, but all the same.

Than I printed another image, and I got the small horizontal lines back!!


Has anyone a solution?
Do I have to upgrade QTR or my Mac?

Thank you!

Eric Levert

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