Digital BW, The Print

Hi Paul, welcome back;

you wrote;>>The EEM yellowing doesn't surprise me. I wonder if it is 
just the optical
brighteners burning out or if your relatively high humidity is 
causing the
acids to attack the paper quicker than usual.<<

I suspect you're right; I think the extreme conditions are showing 
the EEM's weak spot. The real suprise is that the Eboni on W turner 
is STILL showing no change at all and it's now almost 2 months under 
those conditions.

I do however have another curious development to report regarding the
VM 4.3 inks. My 7500 has been sitting unused for about 3 weeks now, 
until yesterday. When I turned it on it ran a cleaning cycle, I did 
a nozzle test...it was flawless. Nice suprise. However, the test 
print I did on EEM came out greenish. Distinctly greenish. It looked 
like the light M toner was weak, but there was no nozzle skipping, 
even with a loupe. 
I decided to procceed on the assumption that somehow some of the 
pigment has settled, either in the lines or the damper, so I took 
the dampers off and pulled about 30ml of ink through them. The ink 
in the LM damper was initially very transparent, like dye ink. As I 
pulled fresh ink into it, it darkened up and became more opaque.

Subsequent test prints are better-but not quite as neutral as they 
were new, so I'm going to pull a bit more ink through the system to 
see if that helps.

Any theories or guesses as to what caused this?

Steve K