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Re: Argyrotype
>So where can one purchase Ammonium Iron Citrate in the US? I looked through
>the catalogs of Formulary, Bryant Laboratories and Artcraft and don't find
>it listed.
>
>Sandy King
>
>
>>I can speak from first-hand experience...if you make up your argyrotype
>>sensitizer with Ammonium Ferric Oxalate, you'll be sorely disappointed.
>>The formula calls for Ammonium Iron (III) Citrate (the green form). All
>>the other Ware formulas call for Ammonium Ferric Oxalate (New Cyanotype,
The formula I have used for Mike Wares web site for the New
Cyanotype, called for "Ammonium Iron(III) Oxalate" Which seems to
called "Ferric Ammonium Oxalate" here in the states.
>>Ware/Malde POP Pt/Pd, and Chrysotype). I was so conditioned to using
>>Ammonium Ferric Oxalate in the Ware formulas that I couldn't figure out
>>why my argyrotype sensitizer wasn't working properly. It wasn't until I
>>re-read the formula that I discovered my mistake.
>>
>>Best,
>>Dan Donovan
>
So it seems to me, somehow the words ferric and Iron(III) are related
maybe interchangable(?)... So, perhaps what some call "Ammonium Iron
Citrate "...could also be called "Ferric Ammonium Citrate"?
If so, it's a common product with a uncommon name...(depending on
your geography)
At least...I've been interchanging them....
garimo