From: Eric (eric@mildew.org)
Date: 05/18/00-09:42:42 PM Z
I've seen the same kind of solarization - though I hesitate to call it
solarization because the areas where it happens go to that bronze color
rather than just losing density. And I can attest that a little bit of
platinum added to the palladium prevents it. Whether it happens also seems
to be related to the quantity of contrast agent. Sorry to toss in yet
another variable. :)
eric volpe
On Thu, May 18, 2000 at 09:54:48PM -0400, Sarah Van Keuren wrote:
> > Tillman Crane wrote:
> >> ... It also sounds like a bronzing effect that happens with over exposure on
> >> palladium prints.
> >
> > It would be nice if someone could quantify this bronzing effect. It
> > must depend on more than just over exposure. I have a particular
> > negative that requires almost a three hour exposure and the uncovered
> > edge coating does not display any signs of bronzing nor solarization.
> > Typical exposures are 6.5 minutes with this light source.
> >
> > At higher than 80F temperatures and higher than 70% RH, I have noticed
> > some random bronzing and solarization effects. However, I do not know
> > of any conditions that can consistently produce the bronzing effect.
>
> My students consistently get the bronzing effect in the edge coating and
> sometimes in the most open parts of the negative when they overexpose
> palladium prints. Ernestine Ruben said that one or two drops of platinum
> mixed with the palladium could prevent this from happening but we have not
> tried that solution.
>
> Sarah Van Keuren
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