[alt-photo] Re: Alternatives to Ferric ammonium citrate for Cyanotypes?

[Peter Friedrichsen]

If unavailable, you may have to resort to making ferric ammonium 
citrate from "scratch", but it is messy because it involves 
precipitating ferric hydroxide and dissolving it into a citric acid 
+ammonium citrate mix. You would need a ferric salt such as sulfate 
or chloride, citric acid, ammonium bicarbonate/carbonate, and a base 
such as sodium hydroxide to precipitate out the ferric hydroxide, 
assuming you have these available.

Of course,  You could also sub oxalic acid if you want to produce 
ferric ammonium oxalate.

Re. Archives:

The archives mentioned only go back to 2009. If you want to do a 
search of all previous archives going back to 1994, try this page:
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Peter

At 02:26 PM 02/02/2011, you wrote:
>Hello.
>
>Can the Ferric ammonium citrate in the Cyanotype process be
>substituted by any other chemical?
>
>I have acquired a bunch of Potassium Ferricyanide but cannot source
>the Citrate anywhere here.
>
>Any alternatives?
>
>Adi
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