Mix patina green and corinth blue1/5/2024 For any but very small pieces of copper, you will need a strong heat source such as oxyacetylene. Note that in air it will take copper, even thin copper, a long time to cool from 800☏ or higher to the point where it can be handled. Extra safety precautions are necessary because of the high heat involved: you must place your copper on real firebricks, and keep flammables well away from the flames and the hot metal.
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