Re: Making Ferric Oxalate

Tox Gunn (tox@remarque.berkeley.edu)
Mon, 21 Oct 96 13:51:03 PDT

Terry - re: h202 probs w/ oxalate
I'd wonder about the stirrer or contamination. The difference between 28.5%
and 30% peroxide is just a little water, and either should be concentrated
enough to oxidize the ferrous to ferric.

Alternate sources for conc. peroxide:
Grau-Hall
Sargent Welch
Aldritch
Sigma

and occassionaly: prof. beautician's supply shops (they carry it for mixing
down perm solution/bleaching solution I think, don't know about purity
though)

Good luck,
Tox
PS: How has the technique been working for you? I've just finished rereading
the Stevens book, and have been thinking about getting into it once I have
contact neg material. The peroxide method looked "cleanest" to me, would be
curious about your experiences with it.

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* Tox Gunn .......tox@remarque.berkeley.edu *
* "Your sanity is not my responsibility!" *
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