Digital BW, The Print

Olivier,

The R1800 cartridges bought from IJM are never more than 2 months old.
We do all filling of small format cartridges in-house. SO there is no
way to purchase carts with pigment settling. You just got yours
recently. However, there is a possibility of contamination of one
shade of ink with another when refilling.

You SHOULD use one syringe for one shade and never mix a syringe used
for one shade with another. One drop of a darker shade of ink will
affect a lighter shade. It is that sensitive and that precise. So you
should have 7 syringes with 7 needles very clearly marked. 

It is better to put the safety cap back on the syringe and letting the
remaining ink stay in the syringe, than trying to wash out a syringe.
If you do go the washing out method - you really need to dry
completely and thoroughly before using it again so the drops of water
do not dilute the ink either.

The obvious of course, is not to put the wrong shade in the cartridge.
Otherwise, you should not be experiencing density changes as you
describe through normal use.

Jon




--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley"
<tyler@...> wrote:
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Olivier"
<odesmais@> wrote:
> ...
> > > Needless to say, my dmax will be nothing near the 3+ you have
> > > reported. But of course I'm juggling more grays.
> > > 
> > Tyler, you do the GO overprint with SP as far as I understood. QTR 
> > might help you there : since you go for double-pass, I'd create a GO 
> > channel alone in QTR and reload the print.
> 
> Olivier, doing pretty much the same thing in the go-down with a spot
channel in StudioPrint. 
> Then the 2nd GO only pass.
> You are correct that a GO overprint will not be the adequate by itself.
> 
> Sorry to hear of the batch problems, I'd definitely contact IJM. I
haven't seen a settling 
> problem with any ink in a long time, particularly these. Make sure
your experience is known, 
> you may get some relief, or some answers, or at least alert them to
a problem.
> I'm getting some inconsistant StudioPrint performance over the last
few months from some 
> software updates, this kind of thing can waste weeks of work.
> 
> Tyler
>