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I did this using our standard melt flow tester. I prepared 10-gram balls by mixing the bismuth subnitrate powder with 1% CMC gum (like what we do for the GBMF test). These balls were fired in an electric oxidation kiln to 1100F, 1200F, 1250F and 1300F (593-704C). It is not difficult to see why this is a potential ingredient in low-temperature frits. Does anyone know why it burns yellow? Does this turn transparent at higher temperatures?
| Materials |
Bismuth Subnitrate
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| Glossary |
Melt Fluidity
Ceramic glazes melt and flow according to their chemistry, particle size and mineralogy. Observing and measuring the nature and amount of flow is important in understanding them. |
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