Robert Harris Glaze

Firing profile

Up Fire profile

150 deg F an hour to 250 deg F

400 deg F an hour to 2050 deg F

120 deg F an hour to 2250 deg F

60 deg F an hour to 2310 deg F with a hold of 20 minutes at 2310 deg F

Down Fire Profile

A half hour hold at 1750 deg F

A three hour hold at 1700 deg F

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

A one hour hold at 1650 deg F

Fast Firing Profile

150 deg F an hour to 250 deg F

400 deg F an hour to 2060 deg F

200 deg F an hour to 2310 deg F with a hold of 20 minutes at 2310 deg F

A one hour hold at 1700 deg F

A two hour hold at 1600 deg F

The cones show both firings as cone 10 firing.

Clay body is a grolleg porcelain from Tacoma Clay Art Center.