[pure-silver] Re: Ansco 120 failure
- From: Philippe Gauthier <pgauth@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 02 Nov 2005 10:20:05 -0500
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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