High fire, please define

[watershed]

Coming from Clay, with a glass minor, High fire....

Please define, and mostly if I read deeply enough into the post, the numbers come out.

But High fire, in 2 different directions, starts at 1800degF then goes to 2400degF. I think it unlikely, though valuable, that anyone is working this hot.

Cone 04 is around 1800degF, highest earthenware, lowest Borosilicate melt. Cone 12, is around 2300degF high porcelain, max stoneware, Melt batch.


For glass, both options are too high for soda lime.


How High is high?

Greg

[PDXBarbara]

For 90 coe like Bullseye: high is 1700... especially with a long soak . B.E. is guaranteed compatible for (check this out, because I don't remember this exactly without looking it up) 3 firings up to something like 1550?? (Somebody correct me, please!). In any case, nothing like a long soak at 1700. I recently started playing around with 96 (Spectrum) at 1650 with long soaks...

High temp for kilnforming is downright chilly compared w/ ceramics...

Hope this helps...
Barbara

[Brian and Jenny Blanthorn]

Coming from Clay, with a glass minor, High fire....

Please define, and mostly if I read deeply enough into the post, the numbers come out.

But High fire, in 2 different directions, starts at 1800degF then goes to 2400degF. I think it unlikely, though valuable, that anyone is working this hot.

Cone 04 is around 1800degF, highest earthenware, lowest Borosilicate melt. Cone 12, is around 2300degF high porcelain, max stoneware, Melt batch.


For glass, both options are too high for soda lime.


How High is high?

Greg

I prefer 2 think about fluidity rather than temp as temps varie in each kiln

High fire is a bit vague as its not realy got a start or finish just a matter of more fluidity

Max temp I go 2 is about 1000 c - 1050 c

At these temps glass will run off the shelf

But U can get bubbles 2 burst n metals / oxides disolve n shuch

But there is a lot U can do 2 get high temp work but without the high temp disavantages

That is by a slow creap up n soaking allong the way

[PDXBarbara]

Brian... re: slow ramp n multi-soaks... the fun part of "high-fire" is that each one is an experiment -- at least that's true so far for me. And so far, I ramp up AFAP, and lay up the glass to to get lotsa air mixed in because it helps drag the glass around with it. That said... slow ramp/multisoak would be yet another look.. Geez Louise it's fun.
Barbara