[pure-silver] Re: HCA (was dichroic fog)
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 5 Apr 2006 16:57:56 -0400
I'm lucky with my water and don't experience any problem with not using
the EDTA and citric acid. Calcium sulfite seems to take awhile before
it forms and settles out. I have little room for storage and don't save
the sulfite/bisulfite solution.
Jerry
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Ryuji Suzuki
Sent: Wednesday, April 05, 2006 4:45 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: HCA (was dichroic fog)
On Wed, 5 Apr 2006 09:09:11 -0400, "Koch, Gerald" <gkoch02@xxxxxxxxxx>
said:
> Five grams each of EDTA and citric acid represent the maximum
> percentage as listed in the MSDS. As Richard suggested 2 grams each
> is probably a more realistic amount and would save money. Actually
> when I use a clearing agent I make it extemporaneously using spoon
> measure and discard it after the session. The EDTA and citric acid
> are not needed then and the darkroom is not cluttered with jugs and
> tanks.
Necessity of EDTA and citrate comes from the kind of water and fixer
used, as Richard cited Henn et al, and it is independent of whether you
use it one shot or not.
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