- tell your friend how nice his small sculptured heads will
look in copper, instead of the bronze he’s been using. These are
"large" melts- up to 400 grams. He uses propane/oxygen with a
torch the size of Texas and a large rosebud tip.
There goes the first crucible. A bunch of granules fused
together nice and tight.
- Tell your friend that Propane/oxygen is just not hot enough
and to use acetylene/oxygen instead.
There goes the second crucible. Also the little remaining hair
on the top of his head is singed and his broom caught fire.
- Tell your friend he must be doing something wrong. Either his
flame is improperly adjusted or his torch just isn’t hot enough.
Suggest that he bring his copper and already twice heated flask
over to your studio where you will demonstrate the superiority of
your hydrogen/oxygen torch, not to mention your expertise.
There goes the third crucible(and your pride). Only 240 grams
of copper granules and 4000 lbs. of hydrogen later and the copper
still just sat there laughing in my face.
Your friend thinks the copper was impure- me thinks there must
be some metallurgical explanation; There must be some limit of
how much copper one can melt using X torch, with X amount of heat
etc. I recall melting about 150 grams of copper awhile back and
don’t remember any difficulties other than that it took longer
to melt than say gold or silver. Now I’m reluctant to make any
more experiments until consulting Orchid.
Anyone out there with an explanation?
Thanks, Peter Slone