making new copper look aged green
On 26 Jan, 05:30, Nige Danton wrote:
I've also tried fuming the copper in amonnia.
Ammonia fuming is great, but it tends to give a mild "antique" patina,
rather than a deliberate verdigris. Works very well on brass. Didn't
we discuss that recently? The trick is to keep the metal out of the
liquid ammonia, otherwise it develops splotches. The usual method is a
big Tupperware box, with ammonia in the bottom, then a layer of wood
shavings, with the metal above.
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