Manganese in a glaze whoes bases are alkali metals only

firing to cone 10 in oxidation

slow downfire at 50 deg F an hour in the interval 1850 deg F to 1700 deg F

slow downfire at 25 deg F an hour in the interval 1700 deg F to 1650 deg F

One hour hold at 1650 deg F

full view

glaze alk_Z4_0 with 2 % Manganese dioxide bowl ~3 inch diameter



full view

glaze mashikoKaki_3 bowl ~3 inch diameter

Is this an underfired oil spot glaze, or just underfired?

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