Discussion
Pyrometric cones measure
Answer: A
Correct answer: heat work, combining temperature and time
A cone bends when it has received enough thermal energy, which depends on how long it was held as well as how hot it got - the same integrated effect the ware itself experiences. That is why a cone is a better guide to whether a firing is complete than a thermocouple reading, which reports only the instantaneous temperature and says nothing about the soak.
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