Archived posting to the Leica Users Group, 1999/01/05

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Subject: Re: [Leica] Re: Chemistry Questions The ultimate advice in processing
From: Mark Rabiner <mrabiner@concentric.net>
Date: Tue, 05 Jan 1999 18:40:34 -0700

"A. Huntley" wrote:
> 
> On Mon 4-Jan-1999 Dan Post wrote:
> 
> >Bryant-
> >While I'm on a rioll- I have to pipe up and agree with Joe- I started with
> >Tri-X and D-76 or Diafine 35 years ago, and still use it for the most part
> >today. I think that the results of Ilford HP5, Kodak Tri-X and Agfapan 400
> >are pretty much the same- but do get with something and explore its
> >possibilities to the fullest! Good Luck!
> >Dan
> 
> Bryant,
> One word of caution if you settle on D-76. Please be advised that its PH
> level increases as it ages causing increased contrast in the neg. Tri-X may
> not be affected too bad since it's "old technology" film. However, this
> characteristic will wreak utter havoc with films like TMax. According to John
> Sexton, this developer should be used at 1:1 to minimize the aging problem,
> and all quantities discarded after sitting on the shelf for one month! When I
> use this developer I buy it in the quart size to keep it as fresh as possible.
> More expensive, but you're assured of consistency. Of course, if ya shoot a
> lot this won't be a problem anyway.  Just my .02 worth...
> 
> Best Regards,
> Alan

If you use d76 straight you are using 100 grams per liter which will
melt down the silver in you neg and redeposit it into your highlights
giving you blocked highlights and mushgrain throughout. 1:1 is the was
to go if not 1:2. I was told HCB has them use 1:1.
Mark Rabiner