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Old 08-15-2020, 03:27 AM
Sean Jones Sean Jones is offline
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Location: Staffordshire U.K.
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Surface metallic copper

I made a nice turquoise with copper in my wire melter but got a reddish film on the outside of the vessels. Itís only obvious where Iíve gathered over an opal but it looks terrible.
I can only assume itís metallic copper reduced by blocking. Is this a common problem or just poor blocking technique?
I had 42g of red copper oxide in 25kg of critalica (5.4g per 7lb). Made the blocks out of local cherry wood.
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