What Is Crazing In Ceramics

Stains can set in and make the crazing more visible and make the dishes look dirty or worn.

What is crazing in ceramics.

Crazing is a term used to reference fine cracks that can be found in the glaze of pottery or china. A craze pattern can develop immediately after removal from the kiln or years later. It is caused by a mismatch in the thermal expansions of glaze and body. Crazing appears when ceramic is cooled and the glaze shrinks more than the clay to which it is rigidly attached.

Crazing can be present in varying degrees. Characterised as a spider web pattern of cracks penetrating the glaze it is caused by tensile stresses greater than the glaze is able to withstand. Glaze crazing or glaze crackle is a network of lines or cracks in the fired glazed surface. We lakeside pottery know of cases where the pinging sounds of newly developed crazing lines go for many years.

It happens when a glaze is under tension. It can also occur in pottery some plastics and composition materials such as the face of a composition doll that has not been properly stored. Crazing is a glaze defect of glazed pottery. Crazing refers to small hairline cracks in glazed surfaces that usually appear after firing but can appear years later.

Crazing is fine cracks in the porcelain s glaze. They often have a spiderweb like appearance. Crazing translates to fine cracks in the glaze or surface layer of porcelain wares. What does crazing mean on china.