What temperature do Orton cones actually indicate in our kilns?

Tuesday 16th September 2014

The blue line on this graph is from the Orton cone chart for 108F/hr. But those are not the target temperatures for our cone firings. We use the red line to program our controllers to produce accurate firings for each cone. Where is that red from? We made it. The self-supporting cones we put in every firing verify that red line, time after time, for thousands of firings (we routinely fire at every cone shown, manually maintaining programs for them all our insight-live.com/glossary/23">kiln controllers). One caveat: As pyrometers degrade and are replaced there is need to adjust the final temperature a few degrees. Should you use that red line? No. Use self-supporting cones to establish your target temperatures.

Pages that reference this post in the Digitalfire Reference Library:

At what point is a self-supporting cone bent to the correct degree?, Cones bending badly, cones bending goodly, Old-style hobby kilns with a sitter are usable if you become "the controller"!, Cones bending theoretically, cones bending actually, Pyrometric Cone

This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.