Re: ferric oxalate
Oh - I should mention - I got a bad bottle of Ferric Oxalate from someplace other than Bostick and Sullivan and I could NOT get the stuff to dissolve, and that which did had a funny solution color. The material that would not dissolve was lumpy and *hard*. The B&S stuff I've used has been very fine powder - clumps break easily - hell, the powder is so fine it goes airborne easily (be careful - where a mask). That bad batch wasted a whole bunch of my time over a couple days. That said - normal ferric oxalate solution is a pain to make - heat and shake, repeat until done. Repeated heating and shaking should achieve goal in about two hours...
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