33A.Ferro Frit 3466 Wt: 329.0 Fusion temp: 1500 °F Molecular Formula: K2O 0.049 Al2O3 0.287 SiO2 2.89 Na2O 0.143 B2O3 0.266 CaO 0.418 BaO 0.033 ZnO 0.096 PbO 0.261 Percentage Analysis: 52.7 % SiO2 8.9 % Al2O3 1.4 % K2O 2.7 % Na2O 7.1 % Cao 1.5 % BaO 2.4 % ZnO 17.7 % PbO 5.6 % B2O3 Comments: Source - William Hunt in Ceramics Monthly May 1978 26 (5) p. 48-54; 7.2 x 10-6 coefficient