Blistering

A phenomenon where small air bubbles or blisters form on the surface of the glaze or clay body during firing. These bubbles can vary in size and shape and may result from factors such as organic material in the glaze, uneven drying before firing, or issues with the glaze composition. Blistering is generally considered an unwanted effect, as it can disrupt the look of the finished piece. Potters and ceramicists aim to prevent it through careful control of firing conditions and glaze composition.