variations on a glaze
Theme - the Ur Glaze
glaze iron_8_R_157_2 stoneware bowl ~5 inch diameter
Variation
glaze iron_8_R_157_2MAl stoneware bowl ~ 5 inch diameter
the glaze variation has slightly lower alumina, all else essentially the same in the seger formula.
Theme - the Ur Glaze
glaze iron_8_R_154 stoneware bowl ~5 inch diameter
Variation 1
glaze iron_8_R_160_0 stoneware bowl ~ 5 inch diameter
The change in the seger formula in variation 1 is a shift of some MgO to CaO, and slightly lower Na2O, with correspondingly higher K2O.
Variation 2
glaze iron_8_R_160_1 stoneware bowl ~ 5 inch diameter
The seger formula in variation 2 has slightly lower alumina, all else nearly identical.
Theme - the Ur Glaze
glaze iron_8_R_159_1 stoneware bowl ~5 inch diameter
Variation
glaze iron_8_R_160_2 stoneware bowl ~ 5 inch diameter
This second glaze has a shift in the balance of alkaline earths, slightly higher CaO, corresponding lower MgO.