Hommel Frit 259 M.P./°F 1500 Silica/Alumina ratio: 7.1:1 Equivalent Molecular Weight: 324.203 Molecular Formula of Hommel Frit 259: K2O 0.208 Al2O3 0.374 SiO2 2.639 Na2O 0.739 B2O3 0.770 F 0.247 CaO 0.016 ZnO 0.038 Percentage Analysis 48.91 % SiO2 11.75 % Al2O3 6.04 % K2O 14.14 % Na2O 0.27 % CaO 0.94 % ZnO 16.50 % B2O3 1.45 % F _____________________ 100 % TOTAL Comments: 10.3 x10-6 Coefficient of expansion