This was a single firing in my quirkly little gas kiln using Steven Hill glazes. This "odd" kiln fires cone 5 1/2 on the bottom and cone 9 on the top. I used Steven Hill's formulated glazes for cone 6 electric firing.... all turned out beautifully!! I also used John Britt glazes from his Ceramics Monthly article about using Turner White as a base in cone 6 to cone 10. John's orange recipe was my liner and modifier. ( really nice smooth glaze)
The firing took 11 hours, but I feel I can cut this to about 10 hours.
When I reached temperature, I turned the kiln off and let it cool naturally to 1700 degrees. Then I re-lit the kiln and controlled the cool down (held at 1600 degrees for 45 minutes),then contolled cooling until 1500 degrees. I shut the kiln off at 1500 and allowed it to cool naturally. ( see Steven Hill's firing schedule on his video)
There were crystal formations and gorgeous glazes!!
Reminds me of a trip to the thermal pools of Yellowstone!!!