----- Original Message -----
From: "John Graves"
I am considering developing my own B&W film. My film cameras are beckoning.
Before I do this, I would like to understand how to dispose of the required
chemicals. I would be using something like Ethol UFG on TMax or
equivalents. It looks like fixer with a simple treatment (desilvering) is
dumpable, but what about the developer and stopbath? I am on a septic
system and don't want to spoil a good system.
Any suggestions either in disposal or alternative products is welcome.
B&W film chemistry is pretty harmless. Developers are a few sodium salt
compounds and some sequestering agents. You wouldn't want to drink the
stuff, but most of it wouldn't give you more than a tummy ache. Stop bath is
~2% acetic acid. Mix white venegar 1:1 with water and you are pretty much
there.
Rapid fixers are a little more potent, but the silver is tied pretty tightly
to sulpher and is actually relatively benign in it's suspended state.
Are you running a septic pond or do you have a tank that gets pumped out
periodically?
William Robb
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
