The temperature/time factor refers to the dynamic relationship between the temperature reached in the kiln and the time during which that temperature is maintained, or transitions are made between different stages of the firing cycle. It is not enough to reach a certain degree of heat; the duration for which the ceramic pieces remain at that temperature is equally decisive in achieving optimum body and glaze maturation.
Precise control of the temperature/time factor makes it possible to obtain shiny, stable and flawless glazes, as well as more resistant and less porous ceramic bodies. If the temperature is too high or maintained too long, deformations or drips may occur in the glaze; on the other hand, if it is insufficient or the time is too short, the result may be incomplete vitrification or dull and porous glazes.
Interesting Fact
Tools such as pyrometric cones soften progressively as they heat up and bend at a specific angle, indicating not only the temperature reached, but also the total energy contributed to the parts.
Helpful Tip
Be sure to follow the specific temperature and time recommendations for each type of clay and glaze, and test when working with new materials. Detailed documentation of each firing cycle, noting temperatures, durations and results, is essential to progressively adjust the temperature/time factor and consistently improve the quality of the pieces.
