31.Ferro Frit 3435 M.P./°F 1300 Silica/Alumina ratio: 32.8:1 Equivalent Molecular Weight: 302.572 Molecular Formula of Ferro Frit 3435: K2O 0.045 Al2O3 0.065 SiO2 2.146 Na2O 0.210 B2O3 0.710 CaO 0.394 PbO 0.351 Percentage Analysis 42.60 % SiO2 2.20 % Al2O3 1.40 % K2O 4.30 % Na2O 7.30 % CaO 25.89 % PbO 16.30 % B2O3 _____________________ 100 % TOTAL Comments: 7.5 x 10-6 coefficient of expansion (50-450° C) Potential Health Hazards: Contains Lead- safe firing practices