I got the printer up and running now but I have problems regarding making the curve. At the workshop we got a good curve on the first try and then it was only further refined for each iteration. When I do this at home it seems the curve is swinging from to light and the program is not able to find the right curve. You can see this on the enclosed curves, lin-1 and lin-2 is from already smoothed text files as you probably have figured out already.
I’m not sure I have the right inkset ? Enclosed is an image of one ink bottle , (I had a leak in the box, that’s why it looks so ugly).
One more thing, in the instructions for DN P2 it says to put photo black ink in the yellow channel. Since I didn’t have any, I put the new superblack matte ink in there because I didn’t think it would be used when making negatives, but only for glossy paper prints. Now it seems the printer is using it anyway, maybe this is the reason of the troubles.
The darkroom process is stable, I print with a Stouffer 31-step tablet on each print, so I can see that there are no variations there.