In ceramics, glazing is typically done before the final firing to create a durable and visually appealing surface on clay objects. However, in some cases, it is possible to apply additional glaze layers after the initial firing, depending on certain factors.
Considerations for Reglazing
Reglazing after firing requires careful consideration of the following:
- Glaze Compatibility: The new glaze must be compatible with the previously fired glaze to avoid cracking, bubbling, or other undesirable reactions.
- Surface Condition: The surface of the fired piece should be clean, free from contaminants, and properly prepared to promote glaze adhesion.
- Temperature: The reglazing process involves firing the piece again, so the firing temperature should be appropriate for both the existing glaze and the new glaze.
When reglazing, consider the application technique:
- Brushing: Brush on the new glaze carefully, ensuring even coverage without disturbing the underlying glaze.
- Spraying: Use a fine mist sprayer for even and controlled application of the new glaze.
- Dipping: Dip the piece into the glaze, making sure to achieve consistent coverage.
Testing and Experimentation
Before reglazing an important piece, it’s recommended to conduct tests on similar clay and glaze combinations to understand the potential outcomes.
While reglazing after firing is possible under certain circumstances, it requires careful consideration of glaze compatibility, surface preparation, firing temperature, and application techniques. Proper testing and experimentation can help you achieve successful results.