Nickel in a barium-zinc glaze with low alumina and low silica

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 cooper_404_0 with 1.5 % nickel oxide, bowl ~3 inch diameter