View Single Post
  #161   Report Post  
Seppo Renfors
 
Posts: n/a
Default Copper Casting In America (Trevelyan)



Tom McDonald wrote:

Eric Stevens wrote:
On Sat, 03 Jul 2004 04:54:31 -0400, Gary Coffman
wrote:


snip

Actually, I can make the claim, because heavily alloyed copper is no longer
native copper.



You are assuming that ALL native copper is of high purity. In fact
much Michigan copper ore is smelted to remove impurities. See
http://www.usdoj.gov/opa/pr/Pre_96/J...95/58.txt.html


Eric,

My understanding is that 'native copper' is a term meaning
'pure copper' (well over 99% pure as found), and not a reference
either to copper 'native' to, say, the Keewenaw Peninsula of the
Upper Peninsula of Michigan, or to copper used by 'native'
peoples. By that definition, copper that needs smelting is not
'native' copper.

Sort of like 'meteoric', init?


Well, that's what happens when a term is abused.

In any event nothing prevents the pure copper from also being melted -
specially not a badly though up term. The point being making small
pieces into big pieces.

--
SIR - Philosopher unauthorised
-----------------------------------------------------------------
The one who is educated from the wrong books is not educated, he is
misled.
-----------------------------------------------------------------