Re: BasicColor 3C print profiling issues
Re: BasicColor 3C print profiling issues
- Subject: Re: BasicColor 3C print profiling issues
- From: Roger Breton <email@hidden>
- Date: Mon, 28 Mar 2005 14:40:53 -0500
> If I load an image in Photoshop CS and apply proof set up to soft proof
> the image, and switch back and forth
> between the old profile and the new with a full color image on screen,
> very little shift is seen. Now take an almost
> neutral (grey) image, and when the old profile is used it looks pretty
> good, but when the new profile is used there
> is an unusual banding effect where a green and magenta band is
> generated in a compeltely neutral area....????
> This banding typically takes place in a area where there is a
> relatively quick light to dark transition.
> I'm trying to determine if this is a software issue or hardware or both?
>
> Robert Bullivant
Boy that's a tough question.
I'm not familiar with the effect of the UV filter on SpectroCams. Nor am I
familiar on the effect of the UV filter on the i1. The only UV-cut filter
instrument I have is a DTP41uv from X-Rite. So, in your case, you wonder
where is that green and magenta coming from: is it coming from your
instrument or your software?
You don't say how fluorescent is your paper?
In any event, I'd experiment with a non-fluorescent paper -- if you can find
one in your local suppliers. If you find you're still getting that dreaded
magenta and green deviations then you can rule out your paper as a possible
culprit. There's always the ink's contribution but that's had to
characterize independently. If you find that your grayscales are pleasantly
neutral then you know that the problem comes from the paper fluorescence --
somehow. I tend to take the view that all profiling software out there,
today, have decent accuracy. The problem, often, is one of measuring.
Can you say more about your paper, your measurements?
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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