Re: Mixing Ferric Ammonium Oxalate
Camden, I mixed the AFO as per Ware's instructions and it went into solution and cleared almost immediately, say within a minute or so. So I don't think I can be of any help to you at all, other than to say that my expereince was very different from yours. Just for the record, the source of my AFO was Artcraft. Sandy At 1:05 PM -0700 2/13/07, Camden Hardy wrote: I bought some AFO to try Mike Ware's POP palladium method, and have a question about mixing it. From Ware's site: Within 5 minutes nearly all the solid will have dissolved to form an emerald-green solution. The volume will be correct (50 cc) so it does not need to be made up. A little remaining solid may be ignored. Filter the solution (Whatman # 1 paper, is adequate) directly into the clean, dry, brown storage bottle, and store at room temperature in the dark. My question: how much is "a little remaining solid"? I mixed a 45% solution (Ware's directions call for 60%), and it's still somewhat milky. I let it sit overnight, and there was still quite a bit of solid that had settled...about 1/8-1/4 inch in about 2 inches of chemistry...60mL bottle. Also, he says to use a Whatman # 1 paper...is a coffee filter adequate? Camden Hardy camden[at]hardyphotography[dot]net http://www.hardyphotography.net
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