I have read the following, several times:
Using OrtonPyrometric ConesCone Numbers 022-14Behavior of Pyrometric ConesTypically, it takes 15 to 25 minutes for a coneto bend once it starts. This depends on thecone number.The cone bends slowly atfirst but once it reaches the half way point(3 o’clock), it bends quickly.When thecone tip reaches a point level with the base, itis considered properly fired. This is the pointfor which temperature equivalents aredetermined. Differences between a conetouching the shelf and a cone at the 4 o’clockposition are small, usually 1 or 2 degrees.
So if I understand this correctly, if I want to reach cone 5, and it is all the way down, and cone 6 has started to bend, then I have over fired by about half a cone. I am using large cones in a plac.
Would someone please verify that I am understanding this correctly.