Helllll on tue 5 may 98
Hello........Nils Lou in his book, The Art of Firing, says the problem with
fiber kilns is that they cool too fast. I went to a kiln-building workshop
awhile back where the kiln master said that the secret is to build fiber kilns
w/a hard brick floor. I have no idea if this works since I haven't seen this
type of kiln fired....Does anybody have any thoughts or opinions on
this?....................hank - in the grand and great state of
Oklahellma....where there's not much to do, but the people are sure nice...
ThePottery on wed 6 may 98
Hank....What you need in a fiber kiln to help prevent the fast cool down is
"MASS." I would build the floor and walls (up to just over the burner ports)
with fire brick and then go with fiber above that. Yes you will be spending a
little more on the fuel but the extended cooling will help your glaze results.
Good luck Tracy Penland NC
Ray Carlton on wed 6 may 98
mmm i dunno it may hold heat a bit longer. The vast ammount of heat loss in
fibre kilns is through the crown and upper walls. Very little is lost
through the floor. It may slow the cooling cycle at the bottom end say
below 500 c but at max temp i would say the difference would neglible..
At 08:10 05/05/98 EDT, you wrote:
>----------------------------Original message----------------------------
>Hello........Nils Lou in his book, The Art of Firing, says the problem with
>fiber kilns is that they cool too fast. I went to a kiln-building workshop
>awhile back where the kiln master said that the secret is to build fiber
kilns
>w/a hard brick floor. I have no idea if this works since I haven't seen this
>type of kiln fired....Does anybody have any thoughts or opinions on
>this?....................hank - in the grand and great state of
>Oklahellma....where there's not much to do, but the people are sure nice...
>
>
cheers :) Ray Carlton
McMahons Creek Victoria Australia
Les Crimp on wed 6 may 98
Hank - try Regis Brodie at Skidmore College in Saratoga, NY.
Good luck!
Les Crimp in Nanoose Bay, B.C. on gorgeous Vancouver Island.
-----Original Message-----
From: Helllll
To: Multiple recipients of list CLAYART
Date: Tuesday, May 05, 1998 5:15 AM
Subject: Fiber kilns...
>----------------------------Original message----------------------------
>Hello........Nils Lou in his book, The Art of Firing, says the problem with
>fiber kilns is that they cool too fast. I went to a kiln-building workshop
>awhile back where the kiln master said that the secret is to build fiber
kilns
>w/a hard brick floor. I have no idea if this works since I haven't seen
this
>type of kiln fired....Does anybody have any thoughts or opinions on
>this?....................hank - in the grand and great state of
>Oklahellma....where there's not much to do, but the people are sure nice...
>
WardBurner on thu 7 may 98
Hey Folks,
Yes, fast cool down is a fact with fiber kilns. That's a great advantage or
disadvantage, depends on what you're after. I would never put hard brick in
the bottom of a fiber kiln...sorta defeats the purpose of the fiber. It would
be like buying a Ferrari so you could drive fast, but dragging concrete blocks
behind you so you could stop quicker. If you are worried about a fast cool
down, build with insulating brick. A fast cool down has the advantages of
quicker cycle time & far less cristobalite developement. The disadvantage is a
lack of cryptocrystaline glaze developement (that's what potter's like and it
makes the glaze varied and rich). Many matts depend on this crystaline glaze
developement. If possible, fire your ware in a fiber kiln first to see if you
like the results.
Fiber is great for low-fire such as Majolica or non reduction. Heavy reduction
firing is very hard on the anchoring systems of fiber kilns. Reduction
certainly can be done, but you do need to make repairs more often. We
currently have a 120 cubic foot fiber car kiln with an insulating brick floor.
We fire cone 7 porcelain in oxidation that uses about $10.00 of natural gas
and fires in 6-7 hours. This is what fiber is for. If we were making cone 10
ware with buttery matts and floating manganese crystals, we would be using a
soft brick kiln.
Again, hard brick floors in a fiber kiln defeat the purpose and will decrease
the fuel savings you're trying to achieve.
Marc Ward
Ward Burner Systems
PO Box 333
Dandridge, TN 37725
USA
423.397.2914 voice
423.397.1253 fax
wardburner@aol.com
Jim Bozeman on thu 7 may 98
>
>>----------------------------Original
message----------------------------
>>Hello........Nils Lou in his book, The Art of Firing, says the problem
with
>>fiber kilns is that they cool too fast. I went to a kiln-building
workshop
>>awhile back where the kiln master said that the secret is to build
fiber
>kilns
>>w/a hard brick floor. I have no idea if this works since I haven't
seen
>this
>>type of kiln fired....Does anybody have any thoughts or opinions on
>>this?....................hank - in the grand and great state of
>>Oklahellma....where there's not much to do, but the people are sure
nice...
>>
>
I've been firing to cone 10 in a fiber kiln for years and haven't had
any problems. Yes, it is true that the kiln cools fast, but that isn't a
problem for me. I fire for approx. 8 to 10 hrs and I'm able to remove
the wares the next morning and even do another firing that day if I
choose to. The kiln does have a hard brick floor. Jim in NC
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