[pure-silver] Re: Hypo Eliminator
- From: Ryuji Suzuki <rs@xxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 18 Feb 2005 01:08:07 -0500 (EST)
I think 2% (20g/L) sodium sulfite is good as a washing aid.
If the solution is to be stored for reuse, I suggest to add a few
grams of DTPA or EDTA, and also a few grams of sodium citrate as
antioxidants to extend the shelf life.
Levenson studied effect of bicarbonate in washing water (not wash
aid), probably because he knew it was a factor and tap water contained
some.
I mentioned chloroacetate because it's mentioned in literature written
by AGFA people to be useful, but I know of no product based on this
compound, or any evidence of efficacy in real life situation.
--
Ryuji Suzuki
"Keep a good head and always carry a light camera."
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