Digital BW, The Print

Jerry:

I agree that it sounds like the inks are reversed, but I don't think
that's the case.  The darker density at 50-55% (vs 60-80%) I think is
just a by-product of the completely flat tones I'm getting from
60-80%.  To put it another way, all of the steps on the printed
step-wedge from the 60% band to the 80% band are indentical in
density.  They also happen to be slightly less dense than the 50 & 55%
bands.

It appears to me that the problem lies in the nozzle responsible for
printing the 60-80% portion of a step wedge (roughly).  Which nozzle
is that?  I think I may try the Fantastik injection method someone
else (flyfishing) mentioned.

Jim

--- In DigitalBlackandWhiteThePrint@y..., Jerry Olson
<jerryolson@r...> wrote:
> It REALLY sounds as if you have the inks in the wrong positions.
> Possibly mislabeled inks? Do the FS inks have to be in a different
> position when using the piezo driver, or ar they same as epson. I
think different.
> 
> Jerry
> 
> Jim HARRIS wrote:
> > 
> > I seem to have no luck with digital black & white.
> > 
> > I started with the Piezography system on an 1160 printer.  Got
beautiful, stunning results.  But after a few months the dreaded
"Density Shift Syndrome" (DSS) set in with severely washed out
midtones and a greenish cast.  Inkjet mall was very good about sending
me replacement cartridges for my CIS system.  I reinstalled Piezo inks
in a new 1160 and got beautiful results again....for about 4-6 weeks.
 Then signs of DSS appeared in the new printer.  I reluctantly decided
to throw in the towel with Piezo inks and give MIS FS inks a try after
reading so many good things about them in this group.
> > 
> > Today I hooked up new cartridges on my CIS system,filled them with
new MIS FS ink, and got perfect nozzle checks the first time.  Then I
tried printing only to discover that I still have absolutely no
density in the mid-tones.  The prints are actually worse than my worst
Piezo DSS prints - almost solarized.
> > 
> > I just printed a gray-scale step-wedge and found that things
appear normal from about 0% to around 30% and from about 85-90% to
100%.  But from about 35% to 80% things are a real mess.  There's a
catastrophic drop in density from 85% to 80%, no discernable
difference in density from about 60% to 80%, and the density at 50-55%
is actually greater than from 60% to 80%.
> > 
> > What is going on?  If any of you can give me some guidance, I'd
appreciate it very much.  To help eliminate some variables:
> > 
> > 1. I am printing on the right side of the paper (I'm using EAM
with the logo on the back).
> > 2.  I double and triple-checked the inks before loading my CIS
system.  I am certain that I loaded the inks, as labeled by MIS, in
the right positions.
> > 
> > Here's what I'm afraid of.  Could a severe case of DSS with the
Piezo inks have done permanent damage o my print head?  I did put the
MIS inks into the 1160 that had a very bad case of DSS, but I have run
a full set of Epson cartridges through it since then and it seemed to
be printing just fine with the color inks (although I didn't ever
print anything too critical with it and carefully analyze the results).
> > 
> > Any thoughts, suggestions, advice, etc. would be appreciated.
> > 
> > Thanks,
> > 
> > Jim
> > 
> > 
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