Still learning how to use my kiln. My first cone 10 firing was ok but I didn't put anything in the kiln that I really liked. The second cone 10 firing included a very nice display bowl along with some other pieces.  I glazed it with "Vegas Red" - a comercial copper-red reduction glaze. The kiln un-expectedly turned off when it reached about cone 1 temperature. I let it cool down and looked inside.  The glazes had hardened but were not mature. The bowl was mostly green with one edge red. I closed it up and started the cone 10 firing again. This time I did not throttle the air as much because I thought that may have been the cause of the shut-down. Of course this did not provide much reduction either.  I stopped the firing at about 1280 C (1300 C is the nominal cone 10 temperature) because it was late (after midnight) and I had to go back to work the next day.

When I opened the kiln the next night the bowl was completly transparent green (except for 2 blips of red). Obviously not enough reduction. The glaze is crazing. The bowl actually looks pretty good -- just not what i had envisioned. I have been told this is common for potters.