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Bisque firing is a crucial step in the ceramics process that involves firing raw clay at a relatively low temperature to transform it into a durable, porous material known as “bisqueware.”
Purpose of Bisque Firing
Bisque firing serves several important purposes:
- It drives out remaining moisture from the clay, preventing steam from causing cracks or explosions during higher-temperature firings.
- It strengthens the clay, making it more rigid and less prone to breakage.
- It prepares the clay for glazing by creating a porous surface that allows glazes to adhere properly.
Bisque Firing Process
The process of bisque firing typically involves gradually raising the temperature of the kiln to around 1650°F (900°C) and holding it at that temperature for a period of time. After firing, the bisqueware is allowed to cool before it can be glazed.
Conclusion
Bisque firing is a critical step that sets the stage for glazing and the final firing of ceramics. It transforms raw clay into a stable and porous material ready for the application of decorative and functional glazes.