13.Ferro Frit 3227 M.P./°F 1300 Silica/Alumina ratio: 4.2:1 Equivalent Molecular Weight: 372.807 Molecular Formula of Ferro Frit 3227: K2O 0.162 Al2O3 0.568 SiO2 2.360 Na2O 0.838 B2O3 1.526 Percentage Analysis 38.02 % SiO2 15.53 % Al2O3 4.09 % K2O 13.93 % Na2O 28.42 % B2O3 _____________________ 100 % TOTAL Comments: 9.8 x 10-6 coefficient of expansion (50-450° C)