[pure-silver] Re: developers for Ilford warm tone papers
- From: Jean-David Beyer <jeandavid8@xxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 02 Nov 2011 10:36:51 -0400
Richard Knoppow wrote:
>
> I have not done any darkroom work for a while so this is old
> information. Dektol has the reputation of producing greenish tinges
> on many papers, I don't know why. Bromophen uses Phenidone in place
> of Metol and tends to produce slightly cooler and more neutral colors
> on most papers. It should give similar results to PQ. I am not sure
> if it also has benzotriazole in it but its a more effective
> anti-foggant for Phenidone developers so they tend to have it in
> place of, or in addition to, bromide. Benzotrizole also tends to
> produce slightly bluer or more neutral colors. Dektol is very
> reliable but is not always the optimum developer.
>
Long ago, when I was using Ilfobrom paper, I objected to the greenish
tone I got with Dektol. I did not get this problem with Amidol
developer, but it was expensive to mix up. Examining the differences,
and trying various things, I concluded that the secret ingredient in the
Amidol developer was not the Amidol, but the fact that the formula I was
using used benzotriazole instead of bromide as the restrainer. Since I
knew that Dektol was a lot like D-72, I mixed up D-72 using
benzotriazole instead of bromide, to my complete satisfaction. The paper
happens to need less exposure with the modified D-72 than the Amidol
developer (Ansco 113?), but the speed increase is not really important
to me.
--
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