From: Carl Weese (cweese@earthlink.net)
Date: 02/05/02-05:28:51 AM Z
Don,
Recent experience indicates that a much smaller amount of oxalic acid and
EDTA are helpful. Maybe 3-4 grams of oxalic and 1-2 of EDTA. This helps the
material go into solution more easily, and also seems to help clearing of
the final prints with some papers. Too much EDTA appears to cause "bleeding"
of metal during development. The 'excess' oxalic may also extend the life of
the FO. I've never personally tried the very large dose mentioned in
reference to John and DMK.
---Carl
--
web site with picture galleries
and workshop information at:
http://home.earthlink.net/~cweese/
----------
>From: Don Bryant <dsbryant@telocity.com>
>To: alt-photo-process-l@sask.usask.ca
>Subject: Ferric Oxalate
>Date: Mon, Feb 4, 2002, 10:48 PM
>
> Hi Folks,
>
> In Sullivan and Weese's book, The New Paltinum Print, on page 78 David
> Kennedy and the late John Rudiak report this variation for Ferric
> Oxalate: For each 100 ml of liquid ferric oxalate solution add 18 gm
> oxalic acid and 6 gm EDTA tetra sodium. This is reputed to increase the
> speed of the ferric oxalte without any degradation of print quality.
>
> Has any one tried this? Is there any advantage in using this formula?
>
> Thanks,
>
> Don Bryant
>
>
>
>
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