Hommel Frit K3 M.P./°F 1450 Equivalent Molecular Weight: 274.218 Molecular Formula of Hommel Frit K3: Na2O 0.669 B2O3 0.864 SiO2 2.568 CaO 0.331 Percentage Analysis 56.24 % SiO2 15.12 % Na2O 6.77 % CaO 21.87 % B2O3 _____________________ 100 % TOTAL Comments: 8.5 x 10-6 coefficient of thermal expansion (50-450° C)