[pure-silver] Re: Fixer Stain Removal

  • From: "Ralph W. Lambrecht" <info@xxxxxxxxxxxxxxxx>
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Tue, 10 Nov 2009 17:41:58 +0100

I'll try that.





Regards



Ralph W. Lambrecht

http://www.darkroomagic.com
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On Nov 10, 2009, at 05:10, Richard Knoppow wrote:
----- Original Message ----- From: "Ralph W. Lambrecht" <info@xxxxxxxxxxxxxxxx > 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, November 09, 2009 2:10 PM
Subject: [pure-silver] Re: Fixer Stain Removal



Richard

Do you happen to have a formula for TC-1?


   Very complicated

Kodak TC-1
Water                           1.0 liter
Potassium bichromate           90.0 grams
Sulfuric acid, concentrated    90.0 ml
There are a number of variations of this which demonstrate mainly that the amounts are not at all critical. The usual Kodak warning holds, add acid to water never the other way. I found out that the stuff is reusable even when it looks quite ugly. Sodium sulfite solution, or Kodak Hypo Clearing Agent will remove yellow stains if any are left. 

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