copper patina

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From: Geoff Ruth (gruth@leadershiphigh.org)
Date: Tue Sep 02 2003 - 19:11:48 PDT

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Message-Id: <p05200f02bb7afdf325cc@[192.168.1.20]>
Date: Tue, 2 Sep 2003 19:11:48 -0700
From: Geoff Ruth <gruth@leadershiphigh.org>
Subject: copper patina

My co-worker and I just got into a big fight about whether copper
patina is copper oxide or copper sulfide/sulfate. I've found both
answers on the Internet -- which is right?

Thanks, Geoff

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