Fiber Kiln/Shelf - WarmGlass.com

Fiber Kiln/Shelf

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smallbitz
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Fiber Kiln/Shelf

Postby smallbitz » Fri Nov 29, 2019 11:56 am

I have a new all-fiber kiln including the shelf. I have heard so much 'noise' about whether or not you can fire directly on the kiln washed fiber shelf OR you should use thin fire, I'm don't know how to proceed. Would really appreciate some advice. Thanks!

Brad Walker
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Re: Fiber Kiln/Shelf

Postby Brad Walker » Fri Nov 29, 2019 12:03 pm

I use thin fire. Kiln wash is more difficult to apply or remove.

Bert Weiss
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Re: Fiber Kiln/Shelf

Postby Bert Weiss » Sun Jan 05, 2020 4:49 pm

smallbitz wrote:I have a new all-fiber kiln including the shelf. I have heard so much 'noise' about whether or not you can fire directly on the kiln washed fiber shelf OR you should use thin fire, I'm don't know how to proceed. Would really appreciate some advice. Thanks!


I agree that kilnwash is problematic. Perhaps Primo would be OK? I dust my shelf with finely ground alumina hydrate. That works for me.
Bert

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Sharol
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Re: Fiber Kiln/Shelf

Postby Sharol » Thu Jan 09, 2020 10:23 am

This thread is very timely for me. I am slowly re-provisioning my studio and recently purchased a new, all fiber kiln and fiber kiln shelf. I’ve completed the burnout and regidizing process. I have had concerns about the surface smoothness and overall shelf durability. My supplier has suggested, and sent me, “Fiber Board Shelf Coat” a high temperature coating cement. I had intended to apply and cook/cure the shelf tomorrow.

I am hoping the Learned Ones here can lend me some wisdom. Will this material result in a practical shelf surface? I’m not a big fan of shelf paper for most of my work and prefer to use kiln wash. I typically remove and replace kiln wash after every firing other than slump temps. Am I better off just buying a good mud shelf?


I’m brand new to all fiber kilns. I purchased this small 18” kiln as an introduction to see if I wanted to go with all fiber in my soon-to-be purchased larger kiln. I was intrigued by the thermal properties of a fiber shelf, but worry that it may not be practical.

Any input is greatly appreciated.

Sharol
Last edited by Sharol on Thu Jan 09, 2020 10:51 pm, edited 2 times in total.

Kevin Midgley
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Re: Fiber Kiln/Shelf

Postby Kevin Midgley » Thu Jan 09, 2020 5:29 pm

Nothing like a regular kiln shelf for taking accidental abuse.
I built my own kilns and went with traditional kiln shelves.
In theory there is less thermal mass in the kiln because of the fibre shelf but by the time you solidify it with cement, I cannot visualize much benefit during heating and cooling or the saving of that much energy.

Marian
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Re: Fiber Kiln/Shelf

Postby Marian » Sat Feb 22, 2020 8:03 pm

I never had any luck with a hardened fiber shelf. The first firing was fine, the next one stuck like crazy and tore a pit out of the shelf making it worse than useless because the glass was ruined as well. If you have a fiber shelf, I would always use thin fire. But I agree with Kevin, a regular shelf is way more durable by far.

jim simmons
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Re: Fiber Kiln/Shelf

Postby jim simmons » Sun Feb 23, 2020 2:52 pm

Bullseye sells ABSOLUTELY the flattest kiln shelf out there.
Shipping cost might be a problem, but I think in the long run it would be worth it.
Shelves from a ceramic supply store may or may not be absolutely flat.
A flat shelf is really necessary for a lot of different kinds of firings.
Just my $0.02 worth.
The other Jim

Buttercup
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Re: Fiber Kiln/Shelf

Postby Buttercup » Sat Feb 29, 2020 12:36 am

I, too, use Bert's method. Alumina Hydrate works for me. I haven't used any hardener on the shelf, either.


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