I have found the copper that is not protected by clear glass cap during the firing process to be undesirable for most applications. It looks charred and loses all of it's color and shine. It is interesting to observe the gradual transition over the length of the copper piece, however. Note in the strip below, the body of the copper has retained the crimson color. About 3/4 inch from the end, it transitions to a dark brown color, and the end looks black and charred.
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| Layered trial example - Blue streaker, copper and partial clear cap. |
The longer copper piece that is exposed in the left hand side below is not the crimson of the piece on the right, however, it is not fully charred either.
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| Layered trial example - White, copper and partial clear cap. |
In the fired piece below, the exposed edge appears to have oxidized and burned off in layers. What remains is a darker, dry-appearing version of the crimson. I wonder if using an abrasive cleaner or scrub brush would result in a more aesthetically appealing piece, or if the magic lies solely with the application of heat?????
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| Layered trial example - White, copper and partial clear cap. |
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