Ilene Richardson on thu 31 oct 02
I bought a big roll of Kaowool on eBay for under $80 ! I used it to
line a propane forge I built using my new mig welder. Kaowool looks
like a giant roll of toilet paper, only thicker.
Ilene
mel jacobson on tue 28 jan 03
yes, totally correct.
it is about density, density.
the cheap, poorly made fibre is
loose and falls apart fast.
buy fibre for highest quality possible.
itc will pull poor fibre from the wall of the
kiln. when we do the inside of a kiln with
fibre we roll the fibre with a rolling pin...get
it flat. then soak in itc and apply.
it will pull back to the original density and stay there.
if you just spray itc on old loose fibre it will
just pull away and fall off...then, of course
the person will say that the itc caused the
problem...`#$&$%itc is not worth a damn.`
sorry, it is the fibre that is not worth a damn.
a great many fibres out there. be sure and get
good stuff, no matter the manufacturer.
feriz said last week when i was with him, that
`a.p. greene still makes a top end fibre.`
i should be corrected to say that, good fibre,
made by a quality company is what you want.
density, that is the key.
mel
From:
Minnetonka, Minnesota, U.S.A.
web site: my.pclink.com/~melpots
or try: http://www.pclink.com/melpots
Tony Ferguson on tue 28 jan 03
I have used AP greens 2 inch 8# density fiber for both of the raku kilns.
Great stuff. Reach temp in 20 minutes. I am going to build a portable cone
10 kiln made from a large outdoor fire pit next using 1 inch (doubled) 10#
density. See if it works.
Thank you.
Tony Ferguson
On Lake Superior, where the sky meets the Lake
Stoneware, Porcelain, Raku and more
by Coleman, Ferguson, Winchester...
www.aquariusartgallery.com
218-727-6339
315 N. Lake Ave
Apt 312
Duluth, MN 55806
----- Original Message -----
From: "mel jacobson"
To:
Sent: Tuesday, January 28, 2003 8:46 AM
Subject: kaowool
> yes, totally correct.
> it is about density, density.
>
> the cheap, poorly made fibre is
> loose and falls apart fast.
>
> buy fibre for highest quality possible.
>
> itc will pull poor fibre from the wall of the
> kiln. when we do the inside of a kiln with
> fibre we roll the fibre with a rolling pin...get
> it flat. then soak in itc and apply.
> it will pull back to the original density and stay there.
>
> if you just spray itc on old loose fibre it will
> just pull away and fall off...then, of course
> the person will say that the itc caused the
> problem...`#$&$%itc is not worth a damn.`
> sorry, it is the fibre that is not worth a damn.
>
> a great many fibres out there. be sure and get
> good stuff, no matter the manufacturer.
> feriz said last week when i was with him, that
> `a.p. greene still makes a top end fibre.`
>
> i should be corrected to say that, good fibre,
> made by a quality company is what you want.
> density, that is the key.
> mel
>
>
> From:
> Minnetonka, Minnesota, U.S.A.
> web site: my.pclink.com/~melpots
> or try: http://www.pclink.com/melpots
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
>
Catherine White on tue 28 jan 03
I use a double layer, 2' X 2' square and about 2" thick, atop my electric
kiln. It was rather expensive and quickly got tattered around the sides
with tail-like pieces hanging loose.
Is this the type fiber you're describing and may I ask the price? Could I
expect better endurance from your AP Greens?
Best wishes,
Catherine in Yuma, AZ
My inability to emulate occasionally results in originality.
http://www.clayart.fsnet.co.uk/pp_catherine_white.html
----- snip-----
> I have used AP greens 2 inch 8# density fiber for both of the raku kilns.
> Great stuff. Reach temp in 20 minutes.
> Tony Ferguson
Hank Murrow on tue 28 jan 03
On Tuesday, January 28, 2003, at 08:46 AM, mel jacobson wrote:
> yes, totally correct.
> it is about density, density.
>
> the cheap, poorly made fibre is
> loose and falls apart fast.
>
> buy fibre for highest quality possible.
>
> i should be corrected to say that, good fibre,
> made by a quality company is what you want.
> density, that is the key.
>
Dear Mel & Rob and other possible fiber users;
I line my Doorless Fiberkiln with 8# density, high temp fiber blanket
from Clark Art Glass & Refractories in Mendota, VA. His fiber is from
the plant in Erwin, TN, and is very good quality for pottery kilns.
I fold this fiber in 8-fold modules to a 7" thickness, and compress the
modules to a density of 12#. The reason for this is that ceramic fiber
reaches its highest insulating value at that density. I experience only
around 1% shrinkage at C/10+ with this fiber folded and compressed in
this manner.
The longevity of ceramic fiber lined kilns is largely dependent upon
the stability of the shell, and the anchoring system used for the
fiber. One of my kilns has undergone over 1800 C/10 fires without a
re-lining, so I feel confident of this approach. For the base of my
kilns, I use bubble-Alumina castable, rated to 3000F.
Hope this adds something to our discussion, Hank in Eugene
rob on wed 29 jan 03
Hank:
This is the same fiber that I carry...after using a number of others, this
is the one that I am happiest with for a variety of uses. I sell it not
only to potters, but also to blacksmiths and other metalworkers who use it
in forges and casting furnaces (including my own).
Rob Van Rens
-at Pine Ridge Pottery Supply in Alexandria, VA
----- Original Message -----
From: "Hank Murrow"
To:
Sent: Tuesday, January 28, 2003 5:48 PM
Subject: Re: kaowool
>
> Dear Mel & Rob and other possible fiber users;
>
> I line my Doorless Fiberkiln with 8# density, high temp fiber blanket
> from Clark Art Glass & Refractories in Mendota, VA. His fiber is from
> the plant in Erwin, TN, and is very good quality for pottery kilns.
>
> I fold this fiber in 8-fold modules to a 7" thickness, and compress the
> modules to a density of 12#. The reason for this is that ceramic fiber
> reaches its highest insulating value at that density. I experience only
> around 1% shrinkage at C/10+ with this fiber folded and compressed in
> this manner.
>
> The longevity of ceramic fiber lined kilns is largely dependent upon
> the stability of the shell, and the anchoring system used for the
> fiber. One of my kilns has undergone over 1800 C/10 fires without a
> re-lining, so I feel confident of this approach. For the base of my
> kilns, I use bubble-Alumina castable, rated to 3000F.
>
> Hope this adds something to our discussion, Hank in Eugene
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
>
rob on wed 29 jan 03
Catherine
Using the setup that you are describing, no, you cannot expect much better
performance AP Green or another refractory blanket.
Refrac blanket is designed to be supported; if you are using it to insulate
the top of your kiln, it should be covered with something. Structurally,
it is pretty much like polyester batting; anything brushing against it will
start to pull the fibers apart.
I've built a number of gas forges using refractory blanket, and they are
always enclosed in a metal box, not to provide any more insulation, but
simply to protect the outside of the blanket layer. One suggestion would be
to find a competent sheet-metal worker or blacksmith in your area and see
about getting a metal housing built on top of the lid to protect the
blanket. It could be made of light-weight sheet metal, even heavy-duty
hardware cloth if you wanted to do it yourself. Stainless-steel
self-tapping screws will hold it to the band that wraps around the lig quite
nicely.
Hope this helps.
Rob Van Rens
-at Pine Ridge Pottery Supply in Alexandria, VA
----- Original Message -----
From: "Catherine White"
To:
Sent: Tuesday, January 28, 2003 1:12 PM
Subject: Re: kaowool
> I use a double layer, 2' X 2' square and about 2" thick, atop my electric
> kiln. It was rather expensive and quickly got tattered around the sides
> with tail-like pieces hanging loose.
>
> Is this the type fiber you're describing and may I ask the price? Could
I
> expect better endurance from your AP Greens?
>
> Best wishes,
> Catherine in Yuma, AZ
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