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Cones come in two sizes. Small cones 1-1/8” long are used in kiln sitters and large cones 2-1'4”long are placed throughout the load, and at the level of the kiln sitter to determine temperature variations and the accuracy of the kiln sitter. The latter are called witness cones. The shorter length and higher density of the small cone makes them stand longer than larger cones when placed on ends. However, when used in the kiln sitter, the small cones bend at the same time as large cones standing.
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Sherril Steele-Carlin |