Spearmint
Chemistry
Recipe
| Material | Amount |
|---|---|
| Nepheline Syenite | 4.0% |
| Flint | 17.0% |
| Ferro Frit 3134 | 23.0% |
| Wollastonite | 28.0% |
| Grolleg China Clay | 28.0% |
| Rutile addition | 6.0% |
| Copper Carbonate addition | 4.0% |
| Bentonite addition | 2.0% |
Oxide analysis % by weight
| Na2O | 2.5% |
|---|---|
| K2O | 1.2% |
| MgO | 0.8% |
| CaO | 15.9% |
| FeO | 0.2% |
| Fe2O3 | 0.3% |
| CuO | 2.3% |
| Al2O3 | 10.2% |
| B2O3 | 4.7% |
| SiO2 | 52.4% |
| TiO2 | 4.8% |
| ZrO2 | 0.3% |
| LOI | 4.3% |
Based on the Spearmint recipe in John Britt’s book “Mid-Range Glazes”, adapted to materials sourced from CTM Pottery Supplies.