Is anybody making their own Ferric Ammonium Citrate

[PGum]

Thanks ! that is a lot ! Reason for asking is that my stock of AFC is glazed over for lack of a better description. It has become one compact block with a glassy appearance, although I kept the brown glass bottle tightly closed and in the dark. I was planning to throw it out, but I gave it a try anyway. Chipped of a piece with a hammer and a screwdriver, and used it for Cyanotype: still works perfectly.

So I thought why not add water on top, let it stand overnight, mix and wait a bit more, and take off this solution and assume it to be saturated at 1.2g per ml and dilute it as needed.

best,

Cor

I never had an issue with old FAC. You may eventually have to deal with mould however. A bit of thymol, or one ASA tablet/ 250 ml. Filter afterwards if using ASA.