I am sculptor/installation artist starting a project making multiple pieces of fired copper. I bought a mini-kiln and my first batch of copper 'leaves' (bought from Cookson's) have turned out very inconsistently. I know that happens but I want the right inconsistency!
The main issue is that they are coming out black on first firing, even before using any flux. If I use flux they turn completely black and it doesn't flake off.
I'm firing at 820 for about 2-3 minutes. Some of the blackness pops off as they cool but I don't want any black. I can manage to 'polish' off some of the black but as I am making many of these it is unfeasible to do this with every one.
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