I have just returned from an exhaustive day of firing a 40 cubic foot, natural gas, forced updraft Alpine kiln at UNCC. The kiln was piloted last night at around 4:30pm, and the firing began today at noon. For nine hours the kiln was monitored and gas and air adjusted as needed. At 9pm (almost exactly) the 04 cone began to bend and the gas to the kiln was stopped. During the previous day the front loading electric kiln ran, it cooled during the same time period.
Modeling pieces on the table to fit into the Alpline | Modeling pieces to fit into the Baily Front-loading electric |