Ferro 3249, Used in Fa Shimbo Glazes, 1, pound


Low expansion magnesium frit



Oxide    Analysis    Formula
MgO    12.80%    1.000
Al2O3    12.50%    0.386
B2O3    30.20%    1.366
SiO2    44.50%    2.331
Oxide Weight    314.84
Formula Weight    314.84





This is a very low expansion frit (since it contains no Na2O or K2O). Use this as a base to make low expansion glazes. However a source of CaO and possibly other fluxes may be needed to melt properly. This is often added to low and medium fire glazes to solve crazing problems.












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