FORMULA CB
CHEMISTRY AND REQUIREMENTS:
General Description: Glass marbles intended for use in the manufacture of fine fiber insulation. This formula is of a more soluble product than Formula - CA.
CHEMISTRY:
| SiO2 | 66.2 + 0.5 |
| B2O3 | 7.0 + 0.3 |
| CaO | 4.5 + 0.3 |
| Al2O3 | 1.75 + 0.2 |
| Na2O | 15.30 + 0.4 |
| MgO | 3.45 + 0.3 |
| Fe2O3 | 0.30 max |
| K2O | 1.1 + 0.4 |
REQUIREMENTS:
| Marble Diameter (mm) | 20 to 25 |
| Softening Points (F) | 1260 + 6 |
| Density (g/cc) | 2.5122 + 0.005 |
