Firing cycle
The firing cycle is the controlled process of increasing and decreasing the temperature inside a kiln, designed to transform clay pieces into finished ceramics. This cycle can last from a few hours to several days depending on the kiln and type of firing. During the process, specific steps are followed that are essential to ensure the quality and stability of the pieces, both functionally and aesthetically.
A typical firing cycle consists of several stages: a gradual increase in temperature, known as a "heating ramp", followed by a hold or soak at the point of maturity (the maximum temperature), and controlled cooling. Each of these stages plays a key role in the transformation of the clay and glazes.
The heating stage allows residual moisture and organic matter in the pieces to evaporate without causing deformation or cracking. The soak ensures the vitrification of the clay and glaze, which gives them hardness, impermeability and strength. Finally, gradual cooling avoids internal stresses and reduces the risk of thermal shock, preserving the structural and aesthetic integrity of the pieces.
A properly executed firing cycle not only ensures uniform firing, but also directly affects the visual and tactile results of the ceramic, such as color, texture and gloss. In advanced processes, cycles can be adjusted to create specific effects, such as crackle or matte surfaces.Interesting Fact
In gas, wood or anagama kilns, the cycle depends more on the skill and experience of the potter to manage the kiln variables, which adds a handcrafted component to the final result.Helpful Tip
If your kiln allows you to program the firing cycle, be sure to set a slow cooling ramp to reduce the risk of thermal shock cracking.
