Re: uncurve/curve comparison on Loris' website
Interesting. I'd characterize that comparison very differently; the
bottom one, to my eye, is heavily cyan-biased; the upper one simply
cuts the cyan way back to match the rather undersaturated yellow and
magenta. It's an interesting effect, and certainly if the same
pigment mixtures are used for both, a special curve for the cyan
layer would be necessary to cut back the extra cyan without
disturbing the other colors. I'd do it by adjusting the cyan pigment
downward to match the saturation of the other colors to get the same
effect. Different roads to the same kingdom.
Katharine
On Sep 27, 2007, at 8:56 AM, ryberg wrote:
Christina,
That is a great image. I noticed it in your book, but it is
too small and the color too limited to make a real impression. I
was greatly impressed when I saw it in Magnachrome.
I'm still working on Adjuma--making curves at the moment. Let
me say specifically what I did which did not work well.
1) Separately determined standard printing time for each of the
three colors. 2) Separately determined curves for each of the three
colors. At this point if I had wanted to make three separate one-
coat gums I would have been able to get the best DMAX and best
tonal range out of each. But, of course, that isn't what I wanted
to do so I made separation negatives and printed each color, one on
top of the other. I did not keep the results--it was VASTLY too
dark. My instinct said, reduce the exposure which resulted in the
prints I put on my website.
Now, the one thing that nearly everone responding does agree on
is that reducing the exposure is NOT the best way to go--and I'm
certainly willing to believe that.
So, now I'm, running curves with less pigment in the magenta
layer (I'm still using Daniel Smith's Perelyne Red).
I really doubt that it matters, but I'm using an Epson R1800
with third party dye ink and have determined from one-coat gums,
VDB and Cyanotype that - RPM - all ink colors - no color control
- is the only option which puts down enough ink to give me paper
white.
Thanks for your help. Charles Portland Oregon
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