Iron Red Cone 5 6 Stoneware Glaze:

1
Iron Red Cone 5 - 6 Stoneware Glaze Using
Gillespie Borate Successfully
High Shear Mixing Promotes Iron Dissolution and
yields poor results with any borate
Iron Oxide Impure, coarse Fe2O3 24.5 Borate
Gerstley Borate 30 Preparation High shear
mixing Body White stoneware Firing Cone 6 to
100 electric Result Poor appearance, dull
brown with just faint indications of red.
Gerstley Borate Glaze
2
Iron Red Cone 5 - 6 Stoneware Glaze Using
Gillespie Borate Successfully
Low Shear Mixing is necessary to retain iron
oxides seeds in the glaze for crystal development
Iron Oxide Impure, coarse Fe2O3 24.5 Borate
Gerstley Borate 30 Preparation Low shear
mixing Body White stoneware Firing Cone 6 to
100 electric Result Good appearance,
standard iron red color.
Gerstley Borate Glaze
3
Iron Red Cone 5 - 6 Stoneware Glaze Using
Gillespie Borate Successfully
Gillespie Borate, replacing Gerstley Borate pound
for pound produces a slightly weaker red.
Iron Oxide Impure, coarse Fe2O3 24.5 Borate
Gillespie Borate 30 Preparation Low shear
mixing Body White stoneware Firing Cone 6 to
100 electric Result Red color, but somewhat
weaker than Gerstley Borate control.
Gillespie Borate Glaze
4
Iron Red Cone 5 - 6 Stoneware Glaze Using
Gillespie Borate Successfully
Gillespie Borate quantity reduced 10 and with
iron oxide increased by same amount. Red color
fully restored.
Iron Oxide Impure, coarse Fe2O3 27.5 Borate
Gillespie Borate 26.6 Preparation Low shear
mixing Body White stoneware Firing Cone 6 to
100 electric Result Excellent Red color
Gillespie Borate Glaze