Al2O3 ........................... 0.05 % | Fe2O3 (total Fe 0.010 % | PbO............................... 30.59 % |
As2O3 (total As) .......... 0.32 % | K2O ............. 11.85 % | SiO2............................... 56.34 % |
B2O3 ............................ 0.36 % | MgO............ <0.02 % | TiO2 ................................. 0.02 % |
CaO..............................<0.02 % | Na2O........... 0.23 % | LOI* (550°C) ................... 0.21 % |