Batt wash or kiln wash is a mixture of clay and refractory materials designed to be applied on kiln supports and accessories, such as shelves, posts or refractory plates. Its main function is to create a protective barrier that prevents ceramic pieces from sticking to these surfaces during firing, protecting both the pieces and the kiln equipment.
Formulated to withstand high temperatures, the batt wash withstands extreme heat without degrading, ensuring that the contact between the pieces and the kiln surfaces does not cause damage. In addition, it facilitates equipment maintenance by preventing the accumulation of melted glaze or residue. For example, a shelf covered with batt wash allows easy removal of fired pieces without risk of sticking, even if the glaze has flowed during firing. It also helps to reduce deformations in the pieces by providing uniform support in the contact areas.
Kiln wash is essential in high-temperature processes, such as stoneware or porcelain firing, where extreme conditions demand durable and effective materials to ensure part quality and equipment protection.
Interesting Fact
Kiln wash is used not only in artistic ceramics, but also in the refractory materials industry, such as bricks used in industrial kilns.
Helpful Tip
If you apply batt wash on your shelves, be sure to renew the coating before each firing to ensure proper protection and prevent the glaze from sticking.
