Digital BW, The Print

Ernst, you wrote;
>>I wonder whether Steve has done much printing
after the first installation of the inks and before the 3 weeks
rest. Just contamination with some leftover older ink or cleaning
fluid not totally taken out of the tubes. Otherwise it has to be
separation of the ink and that is strange as the tubes at that
point don't drop more than 10 cm and one would expect the pigment
to be heavier.  <<<

I had gone through approx. 30-50% of a four ounce set of bottles 
(the toners seem to be going faster) before letting the machine sit 
for 3 weeks. My change-over procedure wasn't even remotely as 
thourough as yours, but I was changing from one grayscale set to 
another, not color to grayscale. I'm sure there was some residual 
contamination, but it wasn't visible, and my tone had been very 
consistent. But to update: I pulled another 2-3 syringes of LM 
through the system, at this point I'm sure that all of the remaining 
LM has been cycled through the dampers. The density of the ink in 
the damper is now quite dark, you can barely see color when it is 
back-lit. And, guess what: My printing tone is now back to normal. 
Whatever is going on, it seems to affect the thinned out LM more 
than anything else. Since I'm using the 4.3 and Paul changed the 
toners a little for the final formula, I wonder if the problem 
hasn't already been taken care of? Paul?

Steve K