Re: question about VDB

From: TERRYAKING@aol.com
Date: 04/10/06-01:08:30 PM Z
Message-id: <6b.58729467.316c072e@aol.com>

Charles

 I reason i suggested looking at some other recipes was that a reference in
the correspondence to 27 g in 100ml.

Terry
In a message dated 10/4/06 6:29:01 pm, cryberg@comcast.net writes:

> Loris and Terry,
>     Thanks.  My FAC is from Photographer's Formulary rather than B&S.  I'm
> relieved to know someone else gets a precipitate since it is NEVER
> mentioned.  The first batch I used tap water and thought that was the cause.
> The second batch I used distilled so I thought I had added the silver
> nitrate too quickly.  The third batch was where I noticed the sudden onset
> of the precipitate.  The fourth which I'm currently using had very little
> because I stopped adding the silver nitrate solution.
>      I don't have Keepers of the Light, but a check of half a dozen sources
> turns up a pretty consistent set of figures.  The FAC is always 9 g in a
> total of 100 ml finished solutions.  The tartaric acid is always 1.5 g.  The
> silver nitrate is often 3.8 g, often 4 g.  From my experience the 3.8 might
> be a better figure--I'll measure the volumn of solution I use very carefully
> next time.
> Charles  Portland
>
>
Received on Mon Apr 10 13:10:06 2006

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