marianne kuiper milks on tue 17 jan 06
When (Ok-I'm still fishing about Haiti, however..) a person fires to biscue "04" in the wilderness, or cone 4 to mature and one has no cones....
I'd really like to know, because I find this interesting in general.
Marianne
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Ann Brink on tue 17 jan 06
How about slipping a pyrometer into your suitcase? Not being facetious here.
Ann Brink in Lompoc CA
> When (Ok-I'm still fishing about Haiti, however..) a person fires to
biscue "04" in the wilderness, or cone 4 to mature and one has no cones....
>
> I'd really like to know, because I find this interesting in general.
>
> Marianne
>
Lee Love on wed 18 jan 06
On 2006/01/18 11:47:55, annsart@impulse.net wrote:
> How about slipping a pyrometer into your suitcase? Not being facetious
> here.
>
At my teacher's workshop, the noborigama was bisque fired to red
heat. That's how I bisqued in my Gomi-gama (gomi=garbage. I built
this little kiln out of broken bricks to bisque work for the
noborigama.) The bisque in the noborigama was from 012 to much lower.
--
Lee Love
in Mashiko, Japan http://mashiko.org
http://seisokuro.blogspot.com/ My Photo Logs
"Simplicity is the ultimate sophistication."
--Leonardo da Vinci
Snail Scott on wed 18 jan 06
At 03:43 PM 1/17/2006 -0800, you wrote:
>When (Ok-I'm still fishing about Haiti, however..) a person fires to
biscue "04" in the wilderness, or cone 4 to mature and one has no cones...
In the old days, temperature was often judged by color.
It takes some practice, but it's possible to develop
quite a good eye. You probably already have a good sense
of what color the kiln is at bisque temperature, and
what color the kiln is at maturity. Just start being more
conscious of it. For a short while, I was firing in a
non-ceramics kiln with no pyrometer and no peepholes. I
judged the temperature by the color I could see through
the burner ports. I had witness cones inside, but I
wouldn't be able to see them 'til afterward. I did
several firings in that kiln, and got within a cone or
so of my intended goal each time. You really DO know
what color it should be, I'll bet; you just have to
trust you judgement.
If your kiln has actual peepholes, you'll be way ahead
of my situation, too, since you'll be able to confirm
your judgement by using draw trials. This is especially
useful if you are using glazes. Draw trials are handy
even if you have cones and pyrometers, too, since you
can see the exact result of the temperature you are at.
If the glaze doesn't look melted yet, keep firing. If
it looks good, stop! Of course, it won't look quite the
same as it will after a prpoer slow cooling, but it'll
tell you if your glaze has melted properly or not.
To do draw trials, make little tests with your glaze
on them (or without glaze, if you just want to check
the clay). Ring shapes (about 1.5"-2.5" diameter) with
a flattened bottom on them are most common. This way,
you can line up a bunch of them, one behind the next,
inside the peephole/draw port. They stand up with their
holes facing the peep, and when you think you are close
to temperature, use a length of steel rebar or something
similar to snag one and pull it out, then cool it off
and check it out. If it wasn't ready, fire a while
longer, then pull out the next one, and so on.
-Snail
Arnold Howard on wed 18 jan 06
When I was 14 years old, my father gave me an ancient 35 mm Leika camera.
The lens pulled out and locked in place with a twist. It had no light meter,
so I learned to estimate exposure by eye.
It's the same with a kiln. I think it's useful to observe the color of light
coming out of the kiln during each stage of firing. If you have a digital
kiln, notice the temperature for dark red, cherry red, yellow, bright
yellow, etc. Mentally note the color of the firing chamber when the Kiln
Sitter trips.
Then if for some reason you ever have to turn off your kiln manually without
the aid of cones, Kiln Sitter, pyrometer, or controller, you could do it by
eye alone just like I estimated exposure with my Leika.
By the way, this would make an interesting science project for your
school-age kids.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
----- Original Message -----
From: "marianne kuiper milks"
When (Ok-I'm still fishing about Haiti, however..) a person fires to biscue
"04" in the wilderness, or cone 4 to mature and one has no cones....
marianne kuiper milks on wed 18 jan 06
Hello Arnold,
I will try that. But that wasn't my question.
My question was refering to my trip to Haiti next week (which I may not have mentioned again-sorry), to find out if I could tell cone-idge/readiness when making an out-door fire/pit to fire things, when they could be ready. Not for kids/students but for adults: real use.
To relate it to what you wrote: would it be possible to run my test kiln at home first, observe colors and relate that to an open fire/enclosed fire? I don't feel that I could because the circumstances are not really comperable.
I'm not saying that I am actually going to/able to do that, I would like to be prepared in case it happens. Or next time.
I would really appreciate if you could give me some additional information.
Thank you much,
Marianne
Arnold Howard wrote: When I was 14 years old, my father gave me an ancient 35 mm Leika camera.
The lens pulled out and locked in place with a twist. It had no light meter,
so I learned to estimate exposure by eye.
It's the same with a kiln. I think it's useful to observe the color of light
coming out of the kiln during each stage of firing. If you have a digital
kiln, notice the temperature for dark red, cherry red, yellow, bright
yellow, etc. Mentally note the color of the firing chamber when the Kiln
Sitter trips.
Then if for some reason you ever have to turn off your kiln manually without
the aid of cones, Kiln Sitter, pyrometer, or controller, you could do it by
eye alone just like I estimated exposure with my Leika.
By the way, this would make an interesting science project for your
school-age kids.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
----- Original Message -----
From: "marianne kuiper milks"
When (Ok-I'm still fishing about Haiti, however..) a person fires to biscue
"04" in the wilderness, or cone 4 to mature and one has no cones....
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Edouard Bastarache Inc. on wed 18 jan 06
Hello all,
I have always bisqued without a cone and without a thermocouple
and reading device. The firing schedule is important, and
also the color that I see between the wall and the lid.
I fired my gas kiln to cone 9½ for 8 years without a thermocouple
and reading device. I use the following cones 08, 02, 3, 4, 6, 8, 9,
10.
It works, check my pots on the Net.
"Ils sont fous ces quebecois"
"They are insane these quebekers"
"Están locos estos quebequeses"
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
www.sorel-tracy.qc.ca/~edouardb/Welcome.html
http://retrodemonstration.blogspot.com/
http://www.flickr.com/photos/potier/
http://stainlessfre.blogspot.com/
http://perso.wanadoo.fr/smart2000/index.htm
Snail Scott on thu 19 jan 06
At 07:02 AM 1/18/2006 -0800, you wrote:
>...would it be possible to run my test kiln at home first, observe colors
and relate that to an open fire/enclosed fire? I don't feel that I could
because the circumstances are not really comperable...
It may be more similar than you think. If you can just
get a spot to see into the depth of the pit, the color
you see will be as valid as the color in a peephole.
Also, serious precision is not required. For unglazed
earthenware, which doesn't exactly vitrify and is seldom
fussy, a firing which gets it into the ballpark of being
the right temperature is probably good enough.
-Snail
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