From: Eric Neilsen (e.neilsen@worldnet.att.net)
Date: 02/05/02-01:17:47 AM Z
There was much discussion at the time about this finding. From my
recollection, it was derived based on B&S ferric oxalate powder that had
been prepared to the liquid state and then altered additionally with "extra"
ingredients. Some of the discussion was based on the Sp Gr of ferric
oxalate. I can not reflect on that attempt as I have been making my own
since 1993. There should be no down side that I recall from adding either
of the two components mentioned. The oxalic acid is one of the components
that I use to make it and has been written up early text as a offering
preservative properties. Some time back I did find that an early batch of
ferric oxalate did precipitate a hard white substance after an addition of
EDTA tetra sodium for which Richard had no insight. I removed it and
continued to use it with no problem.
Eric Neilsen
Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas , TX 75226
214-827-8301
Web Sites : www.ericneilsenphotography.com
http://e.neilsen.home.att.net
----- Original Message -----
From: "Don Bryant" <dsbryant@telocity.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, February 04, 2002 7:48 PM
Subject: Ferric Oxalate
> 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
>
>
>
>
This archive was generated by hypermail 2b30 : 03/08/02-09:45:21 AM Z CST