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Do I Need To Pre- Fire New Kiln Shelves?

new kiln shelves

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#1 jpclay

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Posted 28 December 2013 - 07:42 AM

Hello,

 

I vaguely remember reading that new shelves should be fired alone before firing with wares to ensure they are in good shape, but it was a while back and I could be totally off. I think it was because if the shelve are defective it would ruin a load of wares. I understand the thinking around pre-firing kiln wash, but is firing the shelves necessary or overkill?

 

Thank you.

 

Julia Paul


juliapaulpottery.com


#2 MikeFaul

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Posted 28 December 2013 - 08:21 AM

According to Skutt you should temper all of your furniture. I've skipped the tempering for both standard and core light without issue...

#3 High Bridge Pottery

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Posted 28 December 2013 - 09:51 AM

I had been told about firing kiln wash, but never even thought about one of the shelves breaking. I guess if you want to dot all the i's and cross all the t's then go for it but I would just probably risk it and start with a bisque.



#4 Brian Reed

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Posted 28 December 2013 - 11:47 AM

I have never done this.  I thought that was the benefit of refactory material that they hold up to repeated firing.  Also I assume they were fired to be created so not sure why one more is needed.


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#5 Mark C.

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Posted 28 December 2013 - 01:45 PM

I always load new shelves (which are now just washed) into a bisque fire loaded with pots and fire a bit slower.

Never had issues-if its and  electric kiln I would do the same deal.

Mark


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#6 Evelyne Schoenmann

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Posted 29 December 2013 - 04:06 AM

It makes sense to pre-fire new kiln shelves, if only to detect haircracks from handling. I always put kiln wash on new shelves and fire them to the temp that's written on the kiln wash wrapping. I fire in an electric kiln.

I would recommend to apply kiln wash too, jpclay, and pre-fire them. If you work with glaze later on, maybe you will be happy to have put kiln wash on the shelves beforehand....

 

Evelyne


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#7 jpclay

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Posted 29 December 2013 - 07:27 AM

Great, thanks for your input, everyone. I don't want to risk losing a load so will pre-fire -- and they already have a layer of wash.

 

Many thanks, again!


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