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Digital BW, The Print

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Re: Greenies

2001-11-21 by Mark Carpenter

> >   I just wanted to make a quick comment on the "greenies". I tend to see
> >   green when the midtones are compressed.
>
>Yes, but the rules for diagnosing DSS disregard the symptom of
>"greenish cast" just because our perception of color is
>problematic...AND because this symptom usually appears in the latter
>stages of DSS, and is not therefore not a good barometer for first
>signs of the syndrome.
>
>Apologies if you are refering to another problem.
>Jim H.

Well, for myself, it is a symptom of compressed midtones, which is in turn 
a symptom of DSS, so it can be a warning sign. But I agree: compressed 
midtones can be caused by other things, as I discovered, so one does not 
equal the other. I do have to say that the olive cast is very subtle to me 
color-wise, but enough to be annoying. More so because I can't tell if it's 
really there. Sort of like a phantom tickle when you can see that nothing 
is touching you. My eyes don't seem to really see the green, but my brain 
is telling me it's there, if that makes sense. I don't see any green on my 
prints with good contrast. I brought it up because it seemed that the 
people that were suggesting that it was in the eyes of the beholder didn't 
actually see green, and those that did see it thought it was something 
else. I just wanted to say that I CAN see the green, but I KNOW in my case 
it's my perception, not a feature of the Piezo system. The idea isn't 
crazy. People I show the problem prints to don't see green. This may not 
explain all of the green casts being reported, but I'll bet I'm not the 
only one that is seeing it because of the variable ways the brain can 
interpret the tones. It would be nice if we could eliminate the greenies as 
a variable in the DSS problem. If they only show up in prints that uses a 
variety of tones, then I think it can be. If people get green from a dip 
test of the inks or from a printed single solid tone, that's a different 
story and something else is probably at work. There was a chuck of time 
when I wasn't staying current with the lists, so I don't know if the latter 
is the case. I seem to remember that all the inks tested so far are ok, but 
I believe some were missed at the beginning. It is also good to remember 
that we might be looking at a couple of causes that result in the same 
problem. An ill-seated cartridge and a restricted nozzle will both result 
in poor ink flow, and then there may be different reasons for the 
restricted flow, etc. </ramble>

Mark

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