Daffodile - 18-6-2016 at 08:58
So I've been interested in cyanotypes for the last little while, and I thought about making my own Ferric Ammonium Citrate. However there doesnt seem
to be a clear method, and I'm playing it by ear. Here's what I've done so far: I dissolved some red iron oxide in an excess of citric acid, I'm
waiting now for the evolution of gas to die down (it bubbles and fizzes). Today I'll neutralize it with Ammonia, and crystallize.
Any thoughts, feelings, or advice? I havent done this prep before.
j_sum1 - 18-6-2016 at 13:01
I can't answer your question. Sorry.
I have used ferric ammonium oxalate (which I bought). It works well. Is there any advantage to using the citrate?
Good reference for cyanotypes (although you have likely already seen it.)
http://www.alternativephotography.com/wp/processes/cyanotype...
Daffodile - 18-6-2016 at 16:21
In my case its a bit more OTC since I have access to Citric Acid.
PHILOU Zrealone - 19-6-2016 at 08:44
Your Fe oxyde must contain some carbonate if it fizzes and bubbles!
What is the colour of your oxyde?
Red --> Fe2O3 (Fe(III))
Black --> FeO (Fe(II))
or a mix of the two Fe3O4 (Fe(II) and (III))
battoussai114 - 19-6-2016 at 11:18
So far the procedures I found were two, one starting with Iron Nitrate and one starting from Ferrous Hydroxide. In both cases the process seems to be
dissolving the iron source in a Citric Acid/Ammonia solution.