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Ceramic cone question


Date: Sat Nov 02 2002 - 10:41:31 PST

Hello to the kiln gods & goddesses--

My Paragon kiln hasn't been firing to temperature for the last few firings.
The cone has not drooped -- and the last time, the bisque was decidedly
grayish in color instead of white. What could be the reasons (besides the
elements being faulty or wearing out) ??? Could a cold room with windows
open for a few hours during firing prevent the temp from getting high enough?
 Could it take longer for the temp to be reached?

I just noticed I have peep hole plugs but have never used them. Under what
circumstances should I be using them?? I am firing to 06 for elementary
school pieces.