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Description: Plastic Calcium Borate, Borocalcite
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 19.12% | 0.64 | |
| Na2O | 4.30% | 0.13 | |
| Al2O3 | 1.63% | 0.03 | |
| B2O3 | 27.76% | 0.75 | |
| SiO2 | 11.77% | 0.37 | |
| MgO | 4.20% | 0.20 | |
| K2O | 1.38% | 0.03 | |
| Fe2O3 | 0.48% | 0.01 | |
| LOI | 29.35% | n/a | |
| Oxide Weight | 133.52 | ||
| Formula Weight | 188.99 | ||
Since this material varied so much over the years, Ron Roy has been using various dated versions of the analysis, this is one of them.
| Typecodes |
Flux Source
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies. |
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