Choose cone rating from drop down/fly out menu. Box of 50. Orton Large Pyrometric cones are used worldwide to monitor pottery and ceramic firings in kilns where consistent temperature is important to the quality of the final product being fired. Pyrometric cones measure heatwork, the effect of time and temperature. Over time, kilns sometimes drift from their setpoint even though "Nothing has changed . Pyrometric cones will be the first to let you know your ceramic firing is under control or that subtle changes are taking place within your kiln, allowing you to take corrective action before they impact your ware!
