From: Linas Kudzma (lkudzma@earthlink.net)
Date: 02/05/02-06:16:39 PM Z
Sandy,
Ferric Ammonium Sulfate is NOT the same as Ferrous Ammonium Sulfate.
Ferric is Iron (III) or Fe+3
Ferrous is Iron (II) or Fe+2
Reactivities are different. They better be, or Pd/Pt printing wouldn't
work!!
Linas
> [Original Message]
> From: Sandy King <sanking@CLEMSON.EDU>
> To: <alt-photo-process-l@sask.usask.ca>
> Date: 2/5/2002 9:51:23 AM
> Subject: Re: Ferric Oxalate
>
>
>
>
> Eric Neilsen wrote:
>
>
> >
> >I have a how to section on my att web site for Ferric Oxalate. This is
for
> >a direct to liquid approach. I has been discussed that this method my
have
> >impurities in it. Perhaps, but if you make it carefully and repeat how
you
> >make it, the variations from batch to batch are not a problem. As for
how
> >difficult? expensive? The first time you make it is certainly a new
> >experience and getting small quantities of supplies may be more costly,
but
> >slightly increasing the supplies pays off in the long run.
> >
>
>
> At your site you note that the chemicals required are 1) Ferrous
> Ammonium Sulfate ( Ammonium Iron II Sulfate), 2) Hydrogen Peroxide
> 30 - 50%, 3) Oxalic Acid (Dihydrate), and 4) Potassium Ferricyanide.
>
> I have some Ferric Ammonium Sulfate. Would this be the same as
> Ferrous Ammonium Sulfate?
>
> Sandy King
>
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