That is little more than a .7 in the picture in the original post.
Used naphtha exclusively. Maybe 3-4 days I dont remember.
I really should have put a quarter in the picture you are right
I use a lab hotplate and dissolve a gram into about 20ml until in solution, run through a tiny buchner funnel/fritted disc and then precipitate in a petri dish. Ive found decanting after any colored slag precipitates to be key.
The picture below is the precipitation dish for the first and second pull of a 500g a/b before any sort of cleanup or re-x. The picture in the op is the prettier chunks of this batch after cleanup
Ive been doing this since I was 16 years old. Got the process down pat, I get clean crystals on the first 3 pulls of an a/b solution 9 out of 10 times
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