Re: Reduced Dmax with overexposure in Pt/Pd

[Carl Weese <cweese@earthlink.net>]

Sandy,

Sounds pretty normal. Massive exposure causing a reversal of the darkest
values: this is what happens when you get "bronzing" or "solarization"
of the blacks in a palladium print. A platinum/palladium mixture is less
susceptible, but still shows some of the effect.---Carl

Sandy King wrote:
> 
> With reference to the Pt/Pd results that I reported earlier today,
> there was an  anomaly that surprised. When making test prints with a
> step wedge I generally overexpose by 2-3 stops. What I noticed in
> looking at the curves, and this was true of curves with all of the
> lights tested, is that there is actually a rather significant
> decrease in Dmax, or maximum density, with overexposure. By
> significant I mean between log 0.05 - 0.10.
> 
> Is this something that one generally expects to encounter in platinum printing?
> 
> Sandy King
> 
> --

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