From: Linas Kudzma (lkudzma@earthlink.net)
Date: 02/07/02-07:44:15 PM Z
Eric,
If you use this amount in a reasonable time, surely it is worth it. I
think I'll stop with my questions and admonitions. Clearly there are folks
like you who can use these chemicals safely.
Linas
> [Original Message]
> From: Eric Neilsen <e.neilsen@worldnet.att.net>
> To: <lkudzma@earthlink.net>
> Date: 2/6/2002 1:54:47 AM
> Subject: Re: Ferric Oxalate
>
> Linas, What is trouble worth? $$ : ) I can make 2.5 liters of ferric
> oxalate for $140.00. ( excluding needed lab ware.)
>
>
> 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: "Linas Kudzma" <lkudzma@earthlink.net>
> To: "alt-photo-process-l" <alt-photo-process-l@sask.usask.ca>
> Sent: Tuesday, February 05, 2002 7:32 PM
> Subject: Re: Ferric Oxalate
>
>
> > Jeffrey,
> > I missed your below answer to "why make your own" before I posted my
> > question. I see your point. However, there are other uses for ferric
> > oxalate and it will surely remain a specialty chemical for the
foreseeable
> > future. I'd bet Artcraft buys it from someone in bulk, rather than
making
> > it. Ferric oxalate is used in some biochemical tests to measure amounts
of
> > UV (much like we use it). It was even investigated as an additive to
> dental
> > adhesives, and maybe is still used this way? I'm not sure.
> >
> > I'm not criticizing or discouraging anyone. I'm a chemist and enjoy lab
> > work. However, I do think that making ferric oxalate in a home lab may
be
> > more trouble than it's worth. Also, to the uninitiated, watch that
> hydrogen
> > peroxide. Drugstore 3% is harmless, but 30% or higher is very nasty
stuff.
> > Concentrated hydrogen peroxide is a very strong oxidizer, must be stored
> > refrigerated in a vented bottle (builds pressure), reactions can run
away
> > violently, and it can start fires if in contact with flammables. I'd be
> > hesitant to work with it outside of a laboratory. Wear eye protection
(!)
> > and be careful.
> >
> > Linas
> >
> > > [Original Message]
> > > From: Jeffrey D. Mathias <jeffrey.d.mathias@worldnet.att.net>
> > > To: <alt-photo-process-l@sask.usask.ca>
> > > Date: 2/5/2002 2:36:50 PM
> > > Subject: Re: Ferric Oxalate
> > >
> > > jeffbuck@swcp.com wrote:
> >
> > > > .... What do I stand to gain, aside from economy, by making up my
> >
> > > > own FO according to the elaborate procedures outlined by Eric?
> >
> > >
> >
> > > Answered partly as Eric has stated:
> >
> > > Eric Neilsen wrote:
> >
> > > > ... Perhaps, but if you make it carefully and repeat how you
> >
> > > > make it, the variations from batch to batch are not a problem.
> >
> > >
> >
> > > Consistency is key. Making one's own can provide better assurance of
> >
> > > consistency. Also what happens if suppliers like Bostic & Sullivan or
> >
> > > Artcraft no longer make FO? I know of no other use for Ferric Oxalate
> >
> > > and no commercial reason to make it. So knowing how to make it from
the
> >
> > > raw materials that are generally commercially available assures that
it
> >
> > > can be made. Also if one wishes to control certain additives and know
> >
> > > what is actually in their FO, it is a good idea to be able to make it.
> >
> > >
> >
> > > Some liquid FO I have tested are good, others are not. I prefer the
> >
> > > powder FO for storage reasons. And, I would rather make one larger
> >
> > > batch of powder FO than several smaller batches of liquid FO. But,
with
> >
> > > a good supplier of powder FO, ordering can save time and even money.
If
> >
> > > ordering it is a good idea to avoid shipping conditions that subject
the
> >
> > > FO to excessive heat.
> >
> > >
> >
> > > --
> >
> > > Jeffrey D. Mathias
> >
> > > http://home.att.net/~jeffrey.d.mathias/
> >
> >
Linas Kudzma
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