Digital BW, The Print

Ernst,

>> > that strange spraying happens with all the three 9x00
>> >printers a friend and I have loaded with Eboni black. ...
>
>> Is it possible there was some residual dye on the
>> parking pads -- even maybe
>> the dyes that were in the old black pigmented inks?
>> I think Eboni on the pads can react with old dye and
>> make solids that then stick onto the heads.
>> I had some problems with a 1280 that had been
>> using dyes, and it was eliminated as soon as I
>> thoroughly rinsed/cleaned the pads (with Windex --
>> an ammonia solution, I think).

>... The best prints I got was
>when it was really hot in the Netherlands, looks like the ink
>needs a warmer environment to flow.

Perhaps.  I have a 7500, 1160 and 1280 all running Eboni with no problems.
My office/printer room temperature is virtually always between 70 F (21 C)
and 77 F (25 C).

> I guess the pigmentation of the Eboni black is at
>the edge of what is still printable with the 9000.

Perhaps.  I know of at least one person running a 9500 with Ultra Tone inks.
I have test strips from this machine, and they are nearly perfect.  We found
that the 9500 can use the 9000 driver and then use the 7500 UT curves I made
for my machine -- using the 7000 driver.

You once mentioned that the 7500 used a higher head voltage than the 7000,
or something like that. I think you said it was a firmware difference.  Is
it possible this difference between the 7500 and 7000 could have something
to do with the different results we are seeing?  Is it possible that the
9000 could be altered with this firmware change and have it work better with
the pigmented inks?

>The alignment and nozzle check patterns show shaky
>lines for the black with a lot of droplets thrown around them at
>random.

I don't see that with my printers.  When I so see things like that, I think
of surface garbage on the heads and do a Windex-wet paper towel cleaning of
the heads.

I hope you find a fix for this problem, because it sounds like it might
affect a number of people.  Do you know of any 7000 UT or Eboni users?

Paul
http://www.PaulRoark.com