Archived posting to the Leica Users Group, 2002/06/24

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Subject: RE: [Leica] OT: homemade stop bath
From: "Frank Filippone" <red735i@earthlink.net>
Date: Mon, 24 Jun 2002 14:22:58 -0700

Water works for paper as well as film.....

If you want to get fussy.....

Vinegar is 5% acidity
Glacial Acetic Acid is 28%  (GAA)

You could just use 5 times more vinegar as GAA..... or,
to 1 gallon of water... add 2 oz of GAA or 10 ounces of Vinegar....

Use WHITE vinegar....

The purpose of the stop is to provide an acidic environment to stop the
development prosess, that requires a alkaline environment....
Use of water just takes longer and does not stop as fast the development
process.., as it dilutes the developer.... not changing the PH...



Frank Filippone
red735i@earthlink.net


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Replies: Reply from Henning Wulff <henningw@archiphoto.com> (RE: [Leica] OT: homemade stop bath)
Reply from Henning Wulff <henningw@archiphoto.com> (RE: [Leica] OT: homemade stop bath)
Reply from Mark Rabiner <mark@markrabiner.com> (Re: [Leica] OT: homemade stop bath)