I have a strange problem with my R-Jet 4.
I start with a printhead clean, and it all seem ok, there's plenty of white ink in the capping station, and nozzle check is very good.
The white ink fails over time or few prints. The white ink gets fainter as the time goes on. I can get 3 to 4 prints then fading becomes needing 2 applications of underbase, and then it it fades completely after a couple more prints.
If I don't print anything say for an hour after a printhead clean, then the first print will be very faded.
So it appears like there's an air leak somewhere, but why would it happen on all white channels at the same time?
What makes it more weird is that CMYK printing if fine, no problems.
I don't think it's the printhead as I had a spare part put in just to eliminate that and it's still happening. MInd u it still uses the old manifold All dampers are quite new, and capping station is a few weeks old.
Has anyone had a similar problem, or know what the issue is?
many thanks in advance