Description
Orton manufactures four different types of cones (Small cones, Bar cones, Large cones and Self- supporting cones).
The Large and Self-supporting cones are used to measure temperature uniformity and/or if there was sufficient heatwork done to mature the ware. Cones indicate whether the ware received an adequate amount of heatwork to properly mature the clay or glaze. A properly fired cone will bend over with the tip of the cone almost touching the shelf. After firing a kiln, a simple glance at the cone can tell if the firing was successful.
The small and bar cones are mainly used in the kiln shut-off device called the Kilnsitter. This ia mechanical device that shuts off the kiln when the temperature inside is sufficient to cause the cone to deform under the weight of the Kilnsitter rod.
The only true measurement of heatwork is from a Large or Self- supporting cone placed on the shelf next to the ware.
Frequently Asked Questions about cones can be found on Orton website.
Resources may also be found on the Orton website
Bar Cones
Orton Bars were specifically designed to function in the Kiln-Sitter®.
The uniform shape makes consistent placement easy without affecting firing. The novice or beginner will welcome its ease of use, while those practiced in firing will appreciate the consistency.
