- Candling, and climbing slowly at the beginning.
- A single new, larger kiln shelf changed the path of the flame.
- 2.25 pounds soda ash, 2.75 pounds of baking soda, 4 pounds of whiting, and 1/2 a pound of salt. I think this last accounts for the juiciness and the honey-fied tones.
Robots and Cats
46 minutes ago
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3 comments:
Hi - really enjoy your pots - lovely pots and lots of good info. In reading some of your past posts - in Dec 1st - Holly Shatter you mention some of your pots made from cone 10 BMix shattering.
We just unloaded a cone 10 gas kiln and a lot of the pots that were made from Bmix - the larger ones cracked - were sort of torn apart. We thought it was because we had to abort the the firing the day before around 2000 as there was a power failure and then start up again the next day. The kiln was at 800 the next morning which is just about 100 degree higher that normal after a overnight candleling and so we fired the way we normaly do though the kiln climbed a bit faster - so finished the firing about 2 hours sooner. So I think it was too quick a rise in temp through quartz inversion - as the cracks, tears were mostly on the edges that overhung inot the bagwall space.Just wondering if you have had any more trouble with it. I love it - its so great to throw with.
You throw whiting into the kiln when you throw the soda and salt? I've never heard of that. What does it do?
I can only tell you observationally, not chemically, what the whiting does: without it, the soda glaze seems less evenly distributed, and a whole bunch of it ends up on the floor of the burner channel. Which is not a good place for it, not only because it isn't doing any good, but because eventually it will eat away at the brick. I also periodically clean out the burner channel, and pour a fireclay/ alumina slip over the floor, to protect the brick. I am in no hurry to have to rebuild this kiln!
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