Archived posting to the Leica Users Group, 2002/06/18

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Subject: RE: [Leica] Neopan 1600 - image deterioration over time on unprocessed film?
From: "Austin Franklin" <>
Date: Tue, 18 Jun 2002 08:57:01 -0400

Hi Peter,

I have well water, but...your idea may be right on the money.  The water IS
quite aerated...  And if that does cause deterioration of XTOL (never had
ANY problems with D-76, and I've been here for 15 years now!) that surely
could be the problem.

The developer is slightly colored, more "yellow" than brown...



> Austin:  Have you considered that air dissolved in the water that
> was used
> to mix the developer might partially oxidize it?  Back when I was a
> teenager, I noticed that my Dektol didn't turn brown in storage
> as quickly
> as one of my friend's.  We both lived in the same town, with the same
> water.  It turned out that he mixed his developer at his kitchen sink,
> which had an aerator.  I mixed mine at my laundry room sink, which didn't.
> Distilled water would eliminate this possibility, as well as any other
> Vitamin C-killling chemicals in your local water supply.
> --Peter Klein
> Seattle, WA
> >Austin Franklin wrote:
> > >
> > > Hi Mark,
> > >
> > > I think it's developer exhaustion.  No difference in
> development density by
> > > the increase in times!  So much for XTOL being able to be
> stored...  I'll
> > > try a new batch in the morning!
> > >
> > > Regards,
> > >
> > > Austin
> >No difference in development density with the increase in times sure
> >sounds like developer exhaustion to me Austin, but at 1:1 I'm surprised
> >to hear of it.
> >How much chemistry per roll... water and Xtol? which film again?
> >
> >As you know i use it mostly at 1:3 which would seem to be right at it's
> >limit but I can over develop a neg like crazy if I just give it
> more time.
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