Moira Frossard Posted May 14, 2020 Report Share Posted May 14, 2020 According to my glaze recipe books cone 6 firing is 1240 centigrade but the cone temperature chart gives cone 6 as being 1222 centigrade could someone explain. Link to comment Share on other sites More sharing options...
liambesaw Posted May 14, 2020 Report Share Posted May 14, 2020 It depends on the rate of fire during the final 200 degrees Fahrenheit. Here is the Orton chart: Link to comment Share on other sites More sharing options...
Sorcery Posted May 14, 2020 Report Share Posted May 14, 2020 Have a good study of these slight differences. They could mean nothing or everything! Don't get too hung up on temps. Place them conepacks! Sorce Link to comment Share on other sites More sharing options...
neilestrick Posted May 14, 2020 Report Share Posted May 14, 2020 Cones measure heat work, not temperature. Heat work is a function of temperature over time. That is, it takes time for the heat to penetrate the work and have an effect on it. The faster the kiln is climbing, the higher the temperature that must be reached before the heat work is achieved. The slower the kiln is climbing, the lower the temperature. So if you look at the cone charts, there are different columns that show different temps based on the rate of climb for the last 100C of the firing. That is where the difference comes from. Link to comment Share on other sites More sharing options...
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