WHew536674@CS.COM on wed 13 dec 00
"....I had to keep spraying the kiln with water from a spritz-bottle to get
it to heave up to ^ 8...."
This is a new one on me. Never heard about spraying a kiln with water to
cause the temperature to go up faster. Does this really work? And inquiring
minds want to know why. Wish I knew that a week ago.
Fara Shimbo on thu 14 dec 00
I got this idea from Susan Peterson's wonderful
book, The Craft and Art of Clay. She said she had
noticed that Shoji Hamada always liked to fire in the
rain, and found that if she sprayed her gas kiln with
a hose if it stalled, it went up again.
I didn't want to use a hose on my electric, so I
use a spray bottle instead. If it seems to be
stalling, I spray the top and sides of the kiln
just until the water doesn't immediately evaporate.
Voila, the temp goes up. I have no idea why this
works, but it does! Repeat every fifteen minutes
until desired temp is reached.
====== Fara Shimbo =========
Certified Public Nuisance
Robert Santerre on thu 14 dec 00
Spraying the outside of an electric kiln with water seems like a DISASTER WAITING
TO HAPPEN! Can't wait to hear about someone's fatal electrocution.
Be that as it may, it is interesting to consider way a water saturated atmosphere
(raining) promotes a gas or wood firing. Have others experienced this? What
exactly is different from firing in a dry atmosphere? Is it only the firing
schedule that changes (difference in heat rise)? Does it influence reduction? Are
the glazes actually changed? Do any of the kiln gurus have a physical explanation
for the phenomenon?
Scratching my head, Bob
Fara Shimbo wrote:
> Hello, Joyce,
> I got this idea from Susan Peterson's wonderful
> book, The Craft and Art of Clay. She said she had
> noticed that Shoji Hamada always liked to fire in the
> rain, and found that if she sprayed her gas kiln with
> a hose if it stalled, it went up again.
> I didn't want to use a hose on my electric, so I
> use a spray bottle instead. If it seems to be
> stalling, I spray the top and sides of the kiln
> just until the water doesn't immediately evaporate.
> Voila, the temp goes up. I have no idea why this
> works, but it does! Repeat every fifteen minutes
> until desired temp is reached.
> ====== Fara Shimbo =========
> Certified Public Nuisance
> Send postings to firstname.lastname@example.org
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iandol on fri 15 dec 00
Dear Joyce A.
There are variations on this idea but in essence water or steam are =
injected into a kiln to create a substance called Water Gas which is a =
mixture of Hydrogen and Carbon Monoxide. To work there has to be an =
excess of elemental Carbon and some means of getting air into the kiln =
well beyond the burners, which will be burning with a rich mixture, to =
use the energy potential of the Water Gas.
A number of anagama people are saturating their kilns with water to =
induce this effect but it is not well understood. It requires that the =
free carbon is kept above 1100 deg Celsius for the chemistry to work. =
Works well with oil and wood fired kilns.
Hope that is clear
Ivor Lewis. Redhill, South Australia.
CARParagon@AOL.COM on fri 15 dec 00
In a message dated 12/13/00 8:16:23 PM Central Standard Time,
> This is a new one on me. Never heard about spraying a kiln with water to
> cause the temperature to go up faster. Does this really work? And
> minds want to know why. Wish I knew that a week ago.
You do NOT want to spary an electric kiln with water under any circumstances.
There is an immense likleyhood of a potential shock although your breaker
would likely save the day, why take the chance?
With Best Regards;
Curt A. Rothman
Director of Business Development
Fara Shimbo on fri 15 dec 00
Robert Santerre wrote:
> Spraying the outside of an electric kiln with water seems like a DISASTER WAITING
> TO HAPPEN! Can't wait to hear about someone's fatal electrocution.
No, it's not. Firstly, you're spraying a mist, not a stream.
Secondly, the moment it hits the kiln, it vaporizes. Believe me,
I've gotten shocked by kiln elements, I know enough to steer
clear of them. I would think that anyone with any sense would
refrain from spraying near the control box...
====== Fara Shimbo =========
Certified Public Nuisance
Jonathan Kaplan on fri 15 dec 00
I can't believe that there is this thread on the list that started with
some MISINFORMATION about spraying water onto/into a hot kiln.
Does not anyone have any common sense?
So it goes like this....
Seme where, some how, some one "heard" that water increases reduction and
causes the temperature to rise. No verification of the information,no
nothing. Posts it to the list, and lo and behold, people are going to start
hosing there kilns in one way or another, taking that this is the truth
cause some bozo heard it from some one else, who probably heard it from
What is it going to take for those on this list to have some common sense
and not believe everything that is written here to be the gospel truth?
Especially for this one.
This a clear case of MISINFORMATION being put out on the list. Some one is
going to get hurt big time.
While we all talk of sharing information, don't share this one.
BTW, in the brick industry, there are cases where a small amount of water
vapor is injected into the burner to yes, increase reduction effects on
brick, in a controlled way, in a gas kiln. But it is done in a calculated
methodical way, not in the haphazzard way I have read on this list.
Come on, use your heads. Intuitively did this not read as potentially
dangerous? Oh no! It is on the clay art list, and it must be true" NOT
I can see it now "ClayArt Member Hoses Kiln During Firing.......Building
Leveled, 5 Dead" or something tlike that.
While there is lots of good solid information on this list that comes from
reliable people who have been there and done that, myself included, this
thread on introducing water into your kiln is just plain stupid
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