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Showing results for tags 'kilnsitter; cone'.
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Hello! I was wondering if anyone could make a suggestion since last night I did a bisque fire at 04 cone. When I opened the kiln today the cone was completely straight, however it seemed the kiln did a full fire as I set the timer to 7 hours total and have never gone over that time span. I've used this method many times and have always gotten normal 90 degree bent cones so I was so taken back when the cone appeared as if no firing was done ? Could I of just gotten a defective cone ? I've used about 10 from the same pack with no issues. It's the strangest thing... I've never used witness cones but now I feel I may need too. Thanks for any advice!
We recently did a test firing of some cone 6 clays in our old-time Skutt kiln (model 1081 or 181?) to cone 04. The pyrometric bar in the kilnsitter melted to a perfect u/v shape & turned off the kiln, but the 04 witness cone we placed near our test tiles apparently didn't melt at all. Also, the test tiles in this kiln sound less bell-like when we tap them against each other than the ones in our Skutt 818 programmable kiln. 1) How do you tell when a piece is completely bisqued? 2) (Assuming our test tiles really aren't completely bisqued like I think they probably aren't), what should we do to be sure the kiln is doing enough heat work? Should we put 03 bars in the kilnsitter? I'm a tolerably experienced potter, but a total newbie at firing, so any and all advice from those of you with more experience will be very much appreciated. Thank you, -Kristina Vatne