Orton Self Supporting Cones

Pyrometric cones measure heat-work (the effect of time and temperature). Pyrometric cones are slender pyramids made from about 100 carefully controlled compositions. Each cone number is unique in measuring temperature within a small temperature range (less than 30°C). Cones measure the amount of heat absorbed. As the cone nears its maturing range, it softens and the tip begins to bend, drawn down by the influence of gravity. Self-supporting cones are wider at the base than regular large cones and will sit on the kiln shelf at the correct angle with no added clay base. Box of 25.

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