Sorry for the delay on this. Hi Dana, thanks for your input on this issue. I've had ongoing problems with my 9880 and the black channel, and I'm thinking several unrelated things have collided...
Now that printer problems seemed to be addressed, and my dmax is still low, I'm still trying to narrow things down.
With a new batch of WN1 Opaque Black, printing the inkseparation8.tif file provided with QTR, in calibration mode, at 2880 uni, I get just 1.5 with the 9880 (new damper). Measuring just that channel alone.
Same exact test printout with my 1900 yields 1.47, as opposed to MPS1 which is nearly 1.6 in the same printer, different cart, same printout. I'm trying to use the 1900 to help pin this down.
These results, in my experience are low.The paper is Canson Rag Photographique.
I began trouble shooting this after my long established StudioPrint environments (using WN1), the dmax's dropped dramatically around 0.1, more or less depending on paper and the other inks in the environment.
History- After bad K channel banding and the dmax drop, I assumed it was the damper. After replacing the damper, loading new WN1 batch, my banding is fixed but dmax remains low. This is after years of using this exact setup and ink, previously resulting in impressive dmax..
I'm not quite sure what to test next.