Cobalt-free, black, dual purpose porcelain enamel glass
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United States of America Patent
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Apr 30, 1996
Grant Date -
N/A
app pub date -
Mar 9, 1995
filing date -
Mar 9, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A borosilicate glass composition suitable for porcelain enamel applications is disclosed. Accordingly, a black, cobalt-free composition which contains a significant amount of iron oxide was found to be suitable for enameling cast iron and non-pickled steel substrates. The inventive glass is suitable for applications requiring black color, acid resistance, thermal durability and water vapor resistance. In particular, the inventive glass can be used both as a ground coat and a cover coat.
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