This was topic - soldering copper onto copper. Do we have a way to
follow a thread so the real conversation can be later searched?
I get my powdered boric acid from the local Walmart pharmacy. I have
to order it, but it comes in a day or two. I think my last order was
about $10 for 2 one pound jars. That was in September this year. In
any case, it didn’t seem like a lot of money and the pharmacy is
local so no shipping charge.
As I remember, boric acid in a weak solution was used at one time to
rinse the eyes of newborns.
I just googled boric acid sources and found both boric acid crystals
and boric acid powder available from soapgoods.com for about $4 for a
pound. So it appears that if you think of it as a household chemical,
it is readily available. I also noticed that they have borax in
And if you look at your jewelry equipment supplier, you can find 5
pound boxes of the stuff for $15.