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TECHNICAL INFO
Centigrade to Fahrenheit: (temp x 9/5) + 32
e.g. 100°C x 9/5 = 180, 180 + 32 = 212°F
Fahrenheit to Centigrade: 5/9 x (temp - 32)
e.g. 212°F - 32 = 180, 180 x 5/9 = 100°C
| Chemical Compound | Earth as a Whole | Common Red Clay | North Carolina Kaolin |
| SiO2 | 59.14% | 57.02% | 46.18% |
| Al2O3 | 15.34% | 19.15% | 38.38% |
| Fe2O3 | 6.88% | 6.7% | .57% |
| MgO | 3.49% | 3.08% | .42% |
| CaO | 5.08% | 4.26% | ----- |
| Na2O | 3.84% | 2.38% | 1.22% |
| K2O | 3.13% | 2.03% | ----- |
| H2O | 1.15% | 3.45% | 13.28% |
| TiO2 | 1.05% | .91% | ----- |