Rigidizing fibreboard

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Michelle Schouten
Posts: 11
Joined: Thu Nov 16, 2006 12:05 pm

Rigidizing fibreboard

Post by Michelle Schouten »

I’ve rigidized, fired and cemented a fibreboard in an effort to make a new kiln shelf for my 2417 Evenheat. Does anyone know what temp Celsius I need to fire the cemented fibreboard? I used QF 180 blue as the cement.
Thanks in anticipation
Kevin Midgley
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Joined: Mon Mar 10, 2003 11:36 am
Location: Tofino, British Columbia, Canada

Re: Rigidizing fibreboard

Post by Kevin Midgley »

to whatever burns the binders off. Depends on time and temperature etc. The binder is usually sugar in my experience.
Brad Walker
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Re: Rigidizing fibreboard

Post by Brad Walker »

650 C should do it, but it wouldn't hurt to go to 800 C.
Kevin Midgley
Posts: 773
Joined: Mon Mar 10, 2003 11:36 am
Location: Tofino, British Columbia, Canada

Re: Rigidizing fibreboard

Post by Kevin Midgley »

I thought you were not to take boards and blankets to too high a temperature in burnout because of the risks of creating crystobalite. That is why the non specific temperature I posted. It depends hugely on the amount of binder used in the particular material. I once used some building a kiln and burned it out with so much smoke production I figured someone would call the fire department. The supplier apologized.
Michelle Schouten
Posts: 11
Joined: Thu Nov 16, 2006 12:05 pm

Re: Rigidizing fibreboard

Post by Michelle Schouten »

Thanks guys. I went to 820 C before seeing the replies. The blue cement has turned white and all seems good. I now have a new, flat, bigger shelf on top of the old one.
Kevin, what is crystobalite?
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