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
glaze alk_Z4_0 with 2 % Manganese dioxide bowl ~3 inch diameter
glaze mashikoKaki_3 bowl ~3 inch diameter
Is this an underfired oil spot glaze, or just underfired?