U of S | Mailing List Archive | alt-photo-process-l | RE: ferric oxalate

RE: ferric oxalate

Both Paul and Brian's formula will yield FO that works.  The key, for me, of getting it into solution is patience and a little heat.  For some time I used a technique that Carl Weese showed me using a microwave for 10 second bursts.  I got tired of burning my hands on that hot little brown bottle.  I now have a 1 qt Pyrex that I put very hot water into--like 175 degrees--and a 500 ml beaker that contains my FO and distilled water. I swirl the solution around suspended in the hot water bath and it goes in rather quickly.
Hope that helps.

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Date: Mon, 10 Nov 2008 16:57:06 -0500
From: dhbloomfield@bellsouth.net
Subject: Re: ferric oxalate
To: alt-photo-process-l@usask.ca

That's great.  That helps me.  Thanks, Loris and Paul.

On Nov 10, 2008, at 4:37 PM, Paul Viapiano wrote:

I haven't done this myself yet, but the Arentz book says 15g ferric oxalate, 1g oxalic acid, 55ml H2O at 150 degrees F.
It says continuous mixing and reheating may be required...
I'm sure there's a guide on the Bostick and Sullivan site...or just call them!
Good luck...
----- Original Message -----
Sent: Monday, November 10, 2008 1:13 PM
Subject: Re: ferric oxalate

Oh, lord no. Not for a minute would I attempt to make anything from scratch-- except maybe a pound cake.
No,  I'm just trying to mix up the ferric oxalate powder with distilled water and would like to know the amounts to use-- water to powder, and can you ever heat the water too much?  Just having a hard time here, so wonder if I'm doing something wrong (as usual).

Thanks, Neal.


On Nov 10, 2008, at 4:06 PM, Neal Wilson wrote:

You are trying to make Ferric Oxalate from scratch?  I've always been told this was a difficult process because of the compound's instability.  There are detailed instructions at http://e.neilsen.home.att.net/FerricOxalate.html   I've read again and again that this was something to buy rather make because of the time it takes and that the relative cost savings is neglible.
Did I misunderstand your question?

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> Date: Mon, 10 Nov 2008 15:59:27 -0500
> From: dhbloomfield@bellsouth.net
> Subject: ferric oxalate
> To: alt-photo-process-l@usask.ca
> I'm trying to mix up some ferric oxalate, from powder, for use in pt/ 
> pd printing. Can someone detail their formula for me, for mixing 
> this thoroughly?
> Thanks.
> Diana