Wednesday, July 28, 2010

kiln II copper reds O

the new kiln

The new kiln is here and installed and I did the first firing yesterday of copper reds of course. They came out green again. I am posting pictures of the kiln and the pots since I just don't know what to try next. One change is my oxyprobe from my other kiln is only 8 inches and this one needs 12 inches which will cost 999.00. without the box.
It was a 12 hour firing going up 350F per hour for the 1st 3 hours then with increases of 1"wc it started to go only 200 then 100 then had to be increased 1" per half hour to get a better rate of climb. I had the damper at 2 on the Geil 12cuft fiber kiln. When I pushed it in to 1 3/4 the temp started to drop so I put it back near 2. Each time I checked the spy holes it lit paper or weeds at about 2 inches but I never saw a flame or smelled the reduction smell. any suggestions would be apprecaited. DO I need to reglaze some of the less green pieces? The one white piece has already been through 2 firings ( one in the old kiln)