I'm actually more interested to test copperas after reading this thread, mostly the statement about a good drop from dirty solutions. That is one thing I sometimes have problems with, after SMB the gold comes down as a fine black silt that almost never settles.
Another thing I was impressed by was the speed with which the powders settled in this batch. I have ran this process several times and dropped it with smb, and it always took at least overnight to settle out, and always very dirty. With the copperas I was shocked at the speed with which it settled out, and how much cleaner it appeared to be. I know this may not be a surprise for most here, but as new as I am at recovering and refining, it was a major break through for me, and has made a world of difference in time as well as quality for my efforts.
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