From: Carl Weese (cweese@earthlink.net)
Date: 09/06/02-10:00:16 AM Z
Shannon,
Water source can definitely affect developer activity. That twenty-minute
time in straight D-76 to get 2.0 on TXT is really slow. From my experience
it sounds as though your TN water is slowing development while the TX water
is working fairly normal.
Running water into a tray does not make a good wash. I think by far the best
wash for sheet film is as follows. Two trays, negs in left tray. Run a
couple inches of water into the tray on right, then move negs one at a time
into it. Dump left tray, exchange the positions, and repeat. Keep this up
for ten minutes. This is a perfect wash because it combines complete changes
of water with certain agitation of each sheet.---Carl
--
web site with picture galleries
and workshop information at:
http://home.earthlink.net/~cweese/
----------
>From: shannon stoney <sstoney@pdq.net>
>To: alt-photo-process-l@sask.usask.ca
>Subject: water affecting development; washing big negatives
>Date: Fri, Sep 6, 2002, 9:40 AM
>
> I am developing film in Houston now, and I have noticed that
> development goes much faster here than in TN. Could this be because
> of water differences? In Tn I had to use D76 straight on TriX, and
> sometimes I had to develop for as much as 20 minutes to get the
> highlights to about 1.9 or 2.0. Here in TX, yesterday, I got the
> highlights up to 2.3 (too high for my purposes) with D76 diluted 1:1
> in 15 minutes. The water is a bit warmer here, but in TN I warmed the
> cooler water up to see if I could get the developer to work faster
> too. Yesterday I developed at about 75 degrees (with the help of
> some ice cubes).
>
> I am wondering if the calcium in the water in TN slows D76 down.
> Maybe in the future I should use distilled water when I make the
> stock solution and then again when I dilute the stock solution?
>
> Or do we just have so many chemicals in our Houston water that they
> sort of help D76 along?
>
> The other question has to do with washing big negatives. I put them
> in a tray in the bathtub and run cold water into the tray for about
> ten minutes. Occasionally I come in the bathroom and shuffle them (I
> do two at a time). Is this good enough? When I come to check they
> are usually stuck together, so I wonder if they are getting enough
> clean water around them. But it seems tedious to sit there and
> shuffle them the whole time; however, not that much more tedious than
> rolling the tubes in the tempered water.
>
> --shannon
> --
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