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