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#21 Norm Stuart

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Posted 29 January 2014 - 07:22 PM

We used witness cones in various locations, in a number of firings at different cones and firing speeds. 


Once we figured out the little quirks in how our computer controlled kiln worked, we only use witness cones to diagnose a problem.



People using manual-kilns use them as their primary indicator of when the firing is complete.  Others use them in every firing hoping to spot any problems early.


My wife just purchased a dual media electric kiln. We did our first (correct me if I use wrong terms) firing last night with 03, 04 & 05 test cones.

Do these cones need to be used for every firing?





#22 Jeff Stewart

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Posted 29 January 2014 - 08:37 PM

Thanks so much, Norm. We are fresh at learning the use of this system. It is a Barlette controller on an Olympic electric kiln. I guess we need to be patient with the learning curve.

#23 Marcia Selsor

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Posted 29 January 2014 - 09:26 PM

Just a note, the correct order for those cones is 05,04,03 with 05 being the lowest temperature. You need to put them in that order because as witness cones, the 05 will melt first. It is good to use them when you first start using your kiln to see how accurate the controller is with the cones.

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