Tiny cracks in the glaze to decorate. Often rubbed in with coloring material.

A glaze containing minute cracks in the surface. The cracks are decorative and in the case of raku firing are accentuated by heavy reduction. These cracks are caused by the different rates at which the body and glaze cool and contract after firing.

Minute decorative cracks in a glaze, which are often accentuated by rubbed-in colouring material.