Archived posting to the Leica Users Group, 2004/08/17

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Subject: [Leica] Darkroom
From: dorysrus at mindspring.com (Don Dory)
Date: Tue Aug 17 04:24:23 2004

This darkroom chemistry and septic tank comes up all the time.  It is a
classic case of dosage.  If you are running a commercial lab on your
domestic septic system then you will have problems.  If you are running
a couple of hundred rolls of film a year then there should be no
problems with a normal system in use by a normal family.

If you have concerns about silver then either set up a home collection
system based on cartridges or steel wool.  Your other option is to get
to know your local lab and get permission to dump your used fix in their
silver recovery rig.

The appropriate analogy is that when there were just bears in the woods
the rivers ran pretty clean.  When you have 100 million people upstream
of New Orleans I wouldn't swim in the Mississippi.

Don
dorysrus@mindspring.com

-----Original Message-----
From: lug-bounces+dorysrus=mindspring.com@leica-users.org
[mailto:lug-bounces+dorysrus=mindspring.com@leica-users.org] On Behalf
Of Jesse Hellman
Sent: Tuesday, August 17, 2004 6:17 AM
To: Leica Users Group
Subject: Re: [Leica] Darkroom

I read somewhere, Camera and Darkroom (an expert on chemistry writes a 
column) I think, that the silver present in the fixer is not good for a 
septic tank. But is this true?

Richard Comen wrote:
> 
> I have been on septic systems for 70 years, allways with B&W darkrooms

> and no trouble yet.
> 
> Richard
> Mendocino Ca
> 

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In reply to: Message from hellman at comcast.net (Jesse Hellman) ([Leica] Darkroom)