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Please select "Zone B" if you are not in the Northeast
Sheffield Z Moist Stoneware Clay 50Lb Box cone 6-10
spalling and heat shock
Vent System:Vent-Sure downdraft vent
Absorbtion c/5/ox
Orton Cones: Large Cones - 011 pottery wheel bats Please select "Zone B" ifORTON LARGE CONES 011 : Box of 50 Orton cones, pyrometric cones or witness cones are for accurate kiln firing. Order online from Sheffield Pottery Ceramic Supply. Orton Pyrometric Cones for Ceramic Arts Pyrometric cones measure heat work (the effect of time and temperature). Orton Pyrometric cones are slender pyramids made from about 100 carefully controlled compositions. Each cone number is unique in measuring temperature within a small temperature
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