33C.Ferro Frit 3470 Mol Wt: 232.0 Fusion temp: 1350 °F Molecular Analysis: Na2O 0.08 Al2O3 0.13 SiO2 1.07 CaO 0.23 B2O3 0.28 ZnO 0.26 PbO 0.43 Percentage Analysis: 27.7 % SiO2 5.8 % Al2O3 2.2 % Na2O3 5.6 % CaO 9.0 % ZnO 41.2 % PbO 8.5 % B2O3 Comments: Lead zinc borosilicate frit; 7.5 x 10-6 coefficient of expansion; similar frits - Fusion