Cracked kiln shelves
Posted 25 April 2012 - 04:02 PM
My question is ... can these be used in the kiln or not? Would kiln fix mend them enough to use?
Thanks for your advice.
Posted 25 April 2012 - 04:36 PM
Kiln Repair Tech
Owner, Neil Estrick Gallery, LLC
Posted 25 April 2012 - 05:19 PM
in our studio we mainly produce larger-scale sculpture, not lightweight pottery - so when a shelf gets a crack any more than just a short hairline, we'll set it aside for "waste shelves" that will catch an anticipated mishap, or for a very low-weight bearing situations. for shelves beyond this point, I'll break it up into smaller pieces for propping up/elevating work. for us, it's cheaper/extra insurance to just buy a new shelf than to have a stack be compromised and possibly cause LOTS of damage should the shelf fail mid-firing and dump a heavy load onto neighboring shelves/work and/or damage the kiln. also doesn't hurt to have lab fees which help support new furniture purchases when things break.
for pots or similar, you could be ok depending on what goes on the shelf. should you choose to use it, keeping the load over the supports below will definitely help vs loading the weight right over the crack (which would just not be a smart decision )
Posted 25 April 2012 - 05:36 PM
If its mid range electric use I would use them-I assume you are talking about mullite shelves. some tricks are if you can span the crack with a stilt this can help. No amount of miracle glue will help them. They can always just fall into two pieces during a fire-but that said they usually do not
I fired silicon carbide ones that had cracked for many years with no issues to cone 10
As noted in above posts handle them with more care.
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Posted 25 April 2012 - 07:31 PM
Good Elephant Pottery
Posted 26 April 2012 - 08:26 AM