FotoDave@aol.com
Date: 10/28/02-11:09:40 AM Z
Could anyone on the list show that a density range of 2.0 or more is
achievable on ortho film (with LC-1 or whatever low contrast diluted
developper), that with a full tonal range between fog and d-max.
Philippe,
We do get full tonal range (or full exposure range). The full density range
is indeed low because we have to slow down the development so much to use the
normally flat region. Cor Breukel shows some curves in Post Factory issue #6.
The density range is only about 1.0, but I believe he was using visual
density. If one measures the blue density, the density range is actually
higher and might be high enough for Pt/Pd prints.
> My feeling is that those of you who are talking about halftones have indeed
> halftones, but with a shorter range than on normal halftone film. Such a
> shorter range is therefore of no help for Pd or Pt/Pd.
>
I don't know if you are planning to use Ortho film as in-camera negative. If
you are using it to make interpositive and then final negative, they key is
to make an interpositive of low density range, then you can use stronger
development (e.g. LC-1 without stock B or D-76 or Dektol) and you can have
whatever density range you need for your final negative (is 3.0 - 4.0
enough)? ;-)
Dave S
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