Digital BW, The Print

pr_roark wrote:

> Exactly.  It's the wide format printers that are the more likely 
> problem area.  I do still have Eboni-6 in my 7500, but the carts 
> require manual agitation.  In all my PDFs I stopped recommending 
> these inksets for wide format as soon as I discovered the problem.
> 
>> I know that with CIS you can shake the bottles occasionally.
> 
> Yes, and the problem really didn't show up in the 2200 I had with 
> Carbon-6 for 9 months.  I agitated the bottles occasionally, and the 
> carts do have ink in them that gets agitated.  So, the fluctuations 
> in density appear to get averaged out.
> 
> It does not appear that the "settlement" is causing significant 
> agglomerations of Eboni, it just gets darker at the bottom and 
> lighter at the top.

With the 9000 + my own CIS loaded with MIS VM and the 10000 
with MIS 7600 the least of my problem was actually the 
Eboni. The PK and lighter shades were worse on the 9000, the 
ML and the Y on the color model. The 9000's shaking wasn't 
enough to keep them suspended, the tubes showed 
agglomeration and the dampers collected the particles so got 
blocked. It worked excellent in the first year. Best case 
was when a lot of work had to be done with fresh loads of 
ink. It got worse in the end but even then the Eboni channel 
could be kept open quite well. When looking back I am sure 
the time to keep things going wasn't worth the ink price 
difference on the last color model. There was no other 
choice for color 8 years before than Generations and we know 
there was no other choice for B&W 4-5 years ago.

I'm no longer a candidate for CIS developments but a CIS 
based on HP carts with an actuator to let the pumps work on 
a regular schedule would be a nice construction but even 
then the tube contents should at least be renewed once a 
week by some printing done.


-- 
Met vriendelijke groeten, Ernst


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