Wil Morris on sat 19 jan 08
Well that home depot heater went on sale for $65 so I went for it despite
the feedback that it was a hopeless cause. It fired up beautifully. Moving
from electric to gas is definately turning me into a pyro.
Anyway, I had some partially bisqued pieces that were fired when my
electric set-up went kaput, so I only warmed up these pieces for one hour
before amping up the flame to 'medium', then after two and a half hours
went to just under 'high'.
The 06 cones bent in only four hours of total firing time. And it was 32
degrees out. Wow and I thought I would use a lot of propane but the tank
still weighs a ton.
So looking at the Orton chart, Im having trouble knowing what temperature
I reached. Since Orton cones are not really an indicator of temperature.
I only had 06 and 04 cones. 06 was totally passed out on the shelf and 04
barely began to nod. So Im assuming I went to 05. The Orton chart,
however, only shows a fast ramping of 270F/hr = 1915F, and I definately
ramped at a faster rate than this. Probably almost twice this rate. So
anyone have any idea what kind of temperature 05 cone bent is at 500F/hr?
Of course, Ill take it much slower when glaze firing.
It has become clear that I need affordable pyrometer.Anyone use one of
those Analog ones? Yes, Im cheap and starving artist.
I think I will be able to do all the temps that I have wanted to in one
kiln. Bisque, Raku, cone 6, and cone 10.Ox and redox. This makes my day.
Wil Morris
Olympia, WA
Lee on sun 20 jan 08
On Jan 20, 2008 5:58 AM, Wil Morris wrote:
> Well that home depot heater went on sale for $65 so I went for it despite
> the feedback that it was a hopeless cause. It fired up beautifully. Moving
> from electric to gas is definately turning me into a pyro.
Wil (anybody tell you, you have a grea name for a craftsman?),
Your cones should be good enough. Best use for a
pyrometer is to help you at low temps, before water is burn off and to
tell you which direction you heat is going in. Otherwise, the cones
are better for telling the heat work.
Can you show us what the heater burner looks like? Put
up a photo? I keep thinking I am picturing the wrong kind of heater.
How did you exhaust the kiln? just leave the top cracked?
--
Lee in Mashiko, Tochigi Japan
http://mashikopots.blogspot.com/
"Tea is nought but this: first you heat the water, then you make the
tea. Then you drink it properly. That is all you need to know."
--Sen No Rikyu
"Let the beauty we love be what we do." - Rumi
Maggie Jones on sun 20 jan 08
That sounds cool...got a photo of your setup?
thanks,
Maggie
http://TurtleIslandPottery.com
Maggie and Freeman Jones
On Sat, 19 Jan 2008 15:58:08 -0500 Wil Morris
writes:
> Well that home depot heater went on sale for $65 so I went for it
> despite
> the feedback that it was a hopeless cause. It fired up beautifully.
> Moving
> from electric to gas is definately turning me into a pyro.
>
> Anyway, I had some partially bisqued pieces that were fired when my
> electric set-up went kaput, so I only warmed up these pieces for one
> hour
> before amping up the flame to 'medium', then after two and a half
> hours
> went to just under 'high'.
>
> The 06 cones bent in only four hours of total firing time. And it
> was 32
> degrees out. Wow and I thought I would use a lot of propane but the
> tank
> still weighs a ton.
>
> So looking at the Orton chart, Im having trouble knowing what
> temperature
> I reached. Since Orton cones are not really an indicator of
> temperature.
> I only had 06 and 04 cones. 06 was totally passed out on the shelf
> and 04
> barely began to nod. So Im assuming I went to 05. The Orton chart,
> however, only shows a fast ramping of 270F/hr = 1915F, and I
> definately
> ramped at a faster rate than this. Probably almost twice this rate.
> So
> anyone have any idea what kind of temperature 05 cone bent is at
> 500F/hr?
> Of course, Ill take it much slower when glaze firing.
> It has become clear that I need affordable pyrometer.Anyone use one
> of
> those Analog ones? Yes, Im cheap and starving artist.
>
> I think I will be able to do all the temps that I have wanted to in
> one
> kiln. Bisque, Raku, cone 6, and cone 10.Ox and redox. This makes my
> day.
>
> Wil Morris
> Olympia, WA
>
>
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Donna Kat on mon 21 jan 08
On Sat, 19 Jan 2008 15:58:08 -0500, Wil Morris
wrote:
>Well that home depot heater went on sale for $65 so I went for it despite
>the feedback that it was a hopeless cause. It fired up beautifully. Moving
>from electric to gas is definately turning me into a pyro.
>
Would you share what type of heater you are referring to? I can't imagine
one that would work in a kiln or how you would use it. I have 3 electric
kiln shells and it would be nice to do something with them. Donna
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