[Jewelry making - Article 00696] - [Orchid] Oxidation using glass high temperature enamel on bronze

[Shishir Nevatia]

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    Hi all, I have been asked to make samples of 95/5 bronze medals using
    transparent red glass enamel. The corners and some edges show black
    oxidation underneath the red. Is there any way to avoid? I am using
    German enamel and firing at 875 C which is about 1600 F in a tiny 4
    inch X 3 inch X 5 inch electric furnace. I tried with some argon gas,
    the result is better but inconsistent. Using a larger furnace of
    about 6inch X 6inch X 10 inch depth worsened the result considerably.

Thanks and regards 
Shishir Nevatia

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