Thanks Walker,
I am only printing prints (no negative, as yet).
I do appreciate the importance of keeping all the variables and parameters under tight control, as much as possible. I also realize the utmost importance of keeping the printer and heads clean. I also take into account that the ink cartridges must be steered regularly.
Yet I notice that my inconsistency problem can to occur during the very same printing session, in the span of 10-15mn between the prints. The printing paper is often from the very same sheet, which I cut into two halves for tests.
Could it not be that the problem is caused by the Print Tool / QTR software, maybe, or in the chain process of producing the printing file and transferring it onto the Print tool platform?
Many thanks,
Eitan