What Is Crazing In Ceramics

It happens when a glaze is under tension.

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. What does crazing mean on china. A craze pattern can develop immediately after removal from the kiln or years later. They are not cracks in the actual piece of pottery but rather surface level cracks in the fired glazed of the piece.

They often have a spiderweb like appearance. Crazing appears when ceramic is cooled and the glaze shrinks more than the clay to which it is rigidly attached. We lakeside pottery know of cases where the pinging sounds of newly developed crazing lines go for many years. Glaze crazing or glaze crackle is a network of lines or cracks in the fired glazed surface.

Crazing is fine cracks in the porcelain s glaze. Crazing is a glaze defect of glazed pottery. Crazing can be present in varying degrees. 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.

Sometimes items may have a couple of crazing lines on one side and not the other other times the crazing can look like a spider web and cover the entire item. Crazing refers to small hairline cracks in glazed surfaces that usually appear after firing but can appear years later. 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. Crazing translates to fine cracks in the glaze or surface layer of porcelain wares.