[John Wiegerink]

JohnW, I think you worry too much about boroc acid.
1% impurities is normal for a substance for photo use.
High purity substances are also extremely expensive.

http://www.chemicalland21.com/indust...ric%20acid.htm

George

Just crawled out of the darkroom..........................George that's true about the 1% impurities, but the question is what are they. Harmless to my film? I think maybe they are, but the cheap cost for a good stash of Boric Acid can't be very much I would think. It's late now, but in the morning I'm going to check the Net for the going price. JohnW