[pure-silver] Re: Ansco 120 failure

  • From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
  • To: <pure-silver@xxxxxxxxxxxxx>
  • Date: Wed, 2 Nov 2005 15:33:29 -0800


----- Original Message ----- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, November 02, 2005 6:38 AM
Subject: [pure-silver] Re: Ansco 120 failure


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.

Another possibility is that the carbonate was added before the sulfite.

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 

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