Rip wrote:
: No, copper is annealed by quenching rapidly.


OK, you got me there. As it turns out, copper may be annealed by aircooling
or quenching. To harden copper requires a temperature decrease of about
10,000 degC per second which isn't going to happen if you drop 'em in water.

By the way, you'll never get copper hot enough to anneal with a propane torch.
Oxy-propane, yes.
--
Aaron C.