While brass and bronze have low melting elements that change the properties
and lower the melting point, copper is pure copper and melting it should
make no difference unless you melt it in a crucible that yields crud. I am
not sure how you would purify it after melting anyway. You should (he said
hopefully) be able to pour molten copper around a copper rod in a mold and
have them merge. If you have any doubts, aim a torch at the rod and preheat
it before pouring.

--
Mike Firth
Hot Glass Bits Furnace Working Website
http://users.ticnet.com/mikefirth/I-UPSUMM.HTM
shows recently changed files, click on link
"Zipper" wrote in message
news:%F4bb.529131$Ho3.90165@sccrnsc03...
I was curious what happens to the purity of copper when you melt it. I
don't
know alot about melting, but I want to make some parts for something I'm
going to be trying to sell. I can get very pure copper, but I'm going to
need to melt it. What I want to know is will the "pure" copper remain pure
after I melt it, or will I have try to purify it after I melt it. I have
one
other question if anyone has time to answer it. If I stick a copper rod
into
the form that I have then pour the melted copper will it cause the two to
fuse or will the copper cool down to quickly to melt the existing copper?
Any help would be greatly appreciated. Sorry for my ignorance, but when I
checked goolge for this topic I was unable to find a definitive answer.
Thank you again for your help.

-Zipper