Orton Pyrometric Cone Chart

Orton Pyrometric Cone Chart

2 Replies to “Orton Pyrometric Cone Chart”

  1. Quick question. Do Orton pyrometric cones expire? I have fired 3 times with a 06 witness cones. My 04 cones just don’t bend. I have a paragon kiln.

    1. 04 cones would melt at a higher temp than an 06 cone. So what you describe is what you should experience. Please refer to the Orton Prometric Chart for more information.

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