Glaze defects

Glaze defects are any perceived flaws in the surface quality of a ceramic glaze, its physical structure or its interaction with the body. What counts as a "defect" can be subjective depending on the ceramic tradition. For example, while crawling is often seen as undesirable, it is a characteristic feature of white Shino ware, known as yuzu-hada or "yuzu skin" due to its resemblance to the peel of the said fruit. In Japanese pottery, crackles in the ceramic glaze may also deepen in colour with use over time, e.g. from tea stains, much like the patina on copper objects.