Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., "racetratr" 
<daviddstock@e...> wrote:
<snip>

> The only other thing I  can imagine is that the inks separated or 
> changed in some way. I was out of town for a couple of months, 
> and the machine was only turned on and off periodically during 
> that time. Still, the nozzle checks have been good right from the 
> start, and the first printouts I did when I returned (two weeks ago) 
> were not cyanish/green. 
> 
> What would cause a sudden change like this? Any similar 
> experiences out there?
> 
> Thanks for any input.
> 
> --David Stock

David,

I've never used Generations, so my experience may or may not be 
helpful. About January of 2001, I had been printing with an 1160/CIS 
with the original Piezo inks for about six months. My nozzle checks 
were usually good and clogging was a minor issue. Suddenly (within a 
week) I noticed that prints I had been doing were more flat in 
midtones, more contrasty towards the shadows, and had a greenish cast. 

I went back over some prints I had done back a few months and 
discovered that it had been happening gradually for some time but on a 
very slow basis, and I had missed the gradual changes, compensating 
with curves as I did new prints. Thus as time went on, my curve 
corrections became more serious as time went on. Then it went 
exponential and the problem became obvious in a few days to a week. 
BUT, my nozzle checks were still perfect; I needed few cleaning 
cycles. 

I put Epson carts in for awhile and then put the CIS/Piezo ink back in 
and it improved, but the files I had saved in 8 bit, adjusted for the 
progression of the problem no longer gave me an even print. I had to 
correct back again with the resulting gaps in the histogram. The 
problem came back again in only ten weeks.

A lot of arguement insued over the issue, now called "DSS" or the 
"Greenies", but Jon COne now posts on his website that problem did 
exist. I put it down to ink seperation or evaporation over time, but I 
really never figured out the exact cause.
Jim H.