[LRflex] Re: Something somewhat different
- From: David Simms <simmszee@xxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Sat, 5 Dec 2009 09:56:14 -0800 (PST)
Charlie;
I wasn't aware that silver was particularly toxic, could you enlighten me ?
I think that I've seen reference to silver recovery technology at places like
the Photographers' Formulary which can be accessed online.
Dave
________________________________
From: Charlie Falke <chfalke@xxxxxxx>
To: leicareflex@xxxxxxxxxxxxx
Sent: Sat, December 5, 2009 9:20:14 AM
Subject: [LRflex] Re: Something somewhat different
David Simms wrote:
Charlie, you're cutting to the chase, eh ? I think I know what you're getting
at, the difficulty of getting CLEAN negatives. I have a challenge with that;
microfine volcanic dust in our water. The solution that seems to work is the
following; 5 micron filter takes out the chewable lumps, a ceramic filter takes
out virus-sized particles and I use this water to pre-soak and to wash
negatives. I usually wash using a method i call "successive dilution" whereby
ten water changes (with agitation) should remove the fix. The last step is the
most crucial; I use distilled water with a small amount of wetting agent (one
use only) and I slowly run the loop of film through the wetting solution as I
prepare to hang it up. This tends to remove as much liquid from the film as
possible and it eliminates that nasty tendency for droplets to form.
>
>I usually hang film in the shower stall in the bathroom. So, there's my
>technique for getting clean negatives under challenging conditions.
>
>David Simms, Clearwater, BC, Canada
>David,
Those are all sound techniques, and distilled water with wetting
agent is a good idea and is new to me. It makes better
sense than any amount of filtration of tap water in terms of
drying marks on film, and distilled water is pretty cheap by any
standards.
I was thinking more about keeping the remaining silver
out the ground water, after hypo clearing and silver recovery,
there is still quite a bit left, relative to how toxic silver is.
--
Charlie Falke _____ /\
| __/\__/------/__)
|(____\/_________/
"One test result is worth | |/ `o
one thousand expert opinions" - Wernher Von Braun 0 N4003M
"Imagination is more important than knowledge" - Albert Einstein------
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