Also try building supplies for copper flashing and roofing.
Stop at a construction site where they're using it and ask for some scraps.

Ode

At 09:19 AM 10/25/2003 -0700, you wrote:
>Art supply stores will have sheet copper for making etchings. try
>http://www.danielsmith.com/
>
>
>>Also I believe the soft copper pipe is pretty pure copper. Not the 
>>had kind, but
>>the kind that is easy to bend.
>>
>>One should be able to buy a few feet of large diameter tubing (3/4" 
>>will produce
>>about a 2 3/8" wide sheet), cut it to length, and cut it lengthwise. Then
open
>>it up to make a sheet out of it.
>>
>>Marshall
>>
>>Al Davis wrote:
>>
>>>  Electrical copper wire is 99.95% minimum purity.  Cheap, too.
>>>
>>>  Do a search for 99.95% copper and you'll get lots of references.
>>>
>>>  Al Davis
>>>
>>>  > I keep trying to think of something that's made out of pure copper
and I'm
>>>  > just not getting there.
>>>
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>
>