[pure-silver] Re: Ansco 120 failure
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 2 Nov 2005 10:30:33 -0500
Here a few months ago, I weighed out the Metol and forgot to add it. Got to
test the old addage that Metol does not readily dissolve in sulfite solutions.
It will *if* you heat the solution and stir, stir, stir.
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Philippe Gauthier
Sent: Wednesday, November 02, 2005 10:20 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Ansco 120 failure
Koch, Gerald a écrit :
>>From the two symptoms you describe; developer turning dark brown and
>being weak in its action, I would suspect you may have forgotten to add
>the sodium sulfite when mixing it.
>
>It's useful to keep a notebook and enter information on each ingredient
>as they are weighed out and added. For example,
>
> tare x grams
> chem y grams
> ------
> totl z grams
>
>That way you can double check your work and also identify an error
>later.
>
>
Good advice. I'm pretty sure I measured the sulfite, though. This was a
public experiment and someone commented upon the fact that the same
chemical is used to make cheap wine. I almost forgot the carbonate
before adding the potassium bromide, but in the end it didn't happen. I
use a small electronic scale and tare isn't an issue either.
PG
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