Crackle glaze is a type of glaze that is intentionally applied to the surface of a ceramic or porcelain object in order to create a network of fine cracks in the glaze. This is usually achieved by applying a glaze with a higher expansion coefficient than the body of the ceramic or porcelain, causing the glaze to crack as it cools down after firing. The cracks can be left as they are, or they can be emphasized with pigment or ink.
Crackle glazes have been used in ceramic art and pottery for centuries and can be found in many different cultures around the world. They can be used on a wide range of objects, from small decorative items to large vessels, and can be combined with other glazing techniques such as celadon or underglaze painting.
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