22.Ferro Frit 3278 M.P./°F 1400 Equivalent Molecular Weight: 270.447 Molecular Formula of Ferro Frit 3278: Na2O 0.669 B2O3 0.842 SiO2 2.530 CaO 0.331 Percentage Analysis 56.19 % SiO2 15.33 % Na2O 6.86 % CaO 21.62 % B2O3 _____________________ 100 % TOTAL Comments: 9.7 x 10-6 coefficient of expansion (50-450° C)