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Smoke-Firing In Electric Kiln


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#1 irja

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Posted 21 December 2010 - 03:35 AM

Hello everyone (this is my first post, so hi!), i will try to explain as clearly as i can what i want to do...in english...
what i would like to have as an effect is the black that can be created in a raku-oven, so, the smoke actually colours the biscuit-fired object. But! I don't have a raku-oven and in school there isn't one either (+we are not allowed to put smokey vessels outside over a night).
Now, i know it's possible to get this effect also in an electric oven, if you put the object sealed in a vessel and add burneable stuff to it, i tried it once with newspaper, sawing-dust, leaves, etc. but the work came out completely white. And i don't know what i did wrong...
Can anyone help me with this?
The oven was fired like a bisque-firing.
Thank you very much!!!

#2 OffCenter

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Posted 21 December 2010 - 09:25 AM

Hello everyone (this is my first post, so hi!), i will try to explain as clearly as i can what i want to do...in english...
what i would like to have as an effect is the black that can be created in a raku-oven, so, the smoke actually colours the biscuit-fired object. But! I don't have a raku-oven and in school there isn't one either (+we are not allowed to put smokey vessels outside over a night).
Now, i know it's possible to get this effect also in an electric oven, if you put the object sealed in a vessel and add burneable stuff to it, i tried it once with newspaper, sawing-dust, leaves, etc. but the work came out completely white. And i don't know what i did wrong...
Can anyone help me with this?
The oven was fired like a bisque-firing.
Thank you very much!!!


Leave out the newspaper and make sure the sawdust is packed in tightly. It's a little tough on the kiln and you're likely to upset anyone trying to breath in the vicinity, but if you haven't bisqued the pot too high and pack a dense material (a mix of coffee grounds and crushed charcoal is good) around the part of the pot that you want to color, it should work. If inside, just do one or two small saggers and the smoke and fumes should not be bad enough to get you kicked out of school. If the pot is already bisqued there is no need to fire it like a bisque firing; faster works better.

Jim
E pur si muove.

"But it does move," said Galileo under his breath.

#3 Pres

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Posted 21 December 2010 - 09:30 AM

Hello everyone (this is my first post, so hi!), i will try to explain as clearly as i can what i want to do...in english...
what i would like to have as an effect is the black that can be created in a raku-oven, so, the smoke actually colours the biscuit-fired object. But! I don't have a raku-oven and in school there isn't one either (+we are not allowed to put smokey vessels outside over a night).
Now, i know it's possible to get this effect also in an electric oven, if you put the object sealed in a vessel and add burneable stuff to it, i tried it once with newspaper, sawing-dust, leaves, etc. but the work came out completely white. And i don't know what i did wrong...
Can anyone help me with this?
The oven was fired like a bisque-firing.
Thank you very much!!!


Years ago, when teaching high school, I had an old square electric top loader that was on its last legs. The bricks were worn, but the elements were pretty good. I was interested in giving the kids a little different experience so decided-why not Raku. We mixed up a heavily grogged clay, mixed up some raku glazes, and fired them in the old kiln with a heavy line extension cord. When we reached red heat, we unplugged the kiln, lifted the lid and used a pair of raku tongs made by the school shop and welding aprons to remove the pottery. We placed this in trash cans full of old shop sawdust, rags etc. and smoked them. Clean up was done outside and all went very well. It was a great Spring activity, that got the Ceramics program a little publicity as everyone inside wanted to know what was going on outside! Why unplug the kiln? Hot air is a conductor of electricity. Not that it would ever happen, but you cover your bases!

Simply retired teacher, not dead, living the dream. on and on and. . . . on. . . .                                                                                 http://picworkspottery.blogspot.com/


#4 irja

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Posted 21 December 2010 - 02:33 PM

ok thanks, i will talk to the teachers and see what's possible. Maybe i can use the smallest oven, take the pieces out hot and then put them in pots with materials outside...
and coffee-grind? really? what a nice idea!
thanks!

#5 Marcia Selsor

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Posted 26 December 2010 - 01:30 AM

My friend Russel Fouts has been firing in electric kilns for years using foil saggars . Here are some articles he has published.
READ RUSSEL FOUTS ARTICLE ON PIT FIRING IN ELECTRIC KILN:

http://ceramicartsda...ur-ceramic-art/

Full is interesting techniques. Or read this http://users.skynet....hed_Article.pdf

Marcia





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