FORMULA CA
CHEMISTRY AND REQUIREMENTS:
General Description: Glass marbles intended for use in the manufacture of fine fiber insulation.
CHEMISTRY:
| SiO2 | 63.5 + 0.5 |
| B2O3 | 5.9 + 0.3 |
| CaO | 4.8 + 0.3 |
| Al2O3 | 4.6 + 0.3 |
| Na2O | 16.3 + 0.3 |
| MgO | 3.3 + 0.2 |
| Fe2O3 | 0.14 max |
| K2O | 1.0 + 0.2 |
| SO3 | 0.07 max |
REQUIREMENTS:
| Marble Diameter (mm) | 20 to 25 |
| Sofening Points (F) | 1260 + 6 |
| Density (g/cc) | 2.5200 + 0.0050 |
