In article ,
Rich Grise wrote:

Spehro Pefhany wrote:
On Thu, 30 Dec 2010 09:27:21 -0500, the renowned Joseph Gwinn
Bill Noble wrote:
On 12/29/2010 5:30 PM, Joseph Gwinn wrote:
Spehro wrote:
On Wed, 29 Dec 2010 18:21:59 -0500, the renowned Wes
SNIP
Chances are they didn't use anything nearly as substantial as your
manly 36 cubic inches of aluminum. A decently thick non-stick
aluminum frying pan is probably better than the mail-order gadgets
were.

To achieve full RCM status, you must use a 0.25" thick sheet of tinned
copper.

Actually, .25" thick pure silver - much better conductor than copper

Let's not go overboard here. How about silver-plated copper? Silver is
used in place of tin in very high end copper pots and pans.

Silver plated diamond? (silver just to have some metal content).
Sure! just pop down to the friendly local neighborhood diamond store,
and pick up a 12" x 6" x 1/2" slab of diamond! ;-D

Actually, sheets of polycrystalline diamond can be deposited in bulk
from a RF plasma. But it still ain't cheap. Or that thick.

http://www.efunda.com/processes/surface/thinfilm_coatings.cfm

Joe Gwinn