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• 21:35, 7 March 2026 CompUser talk contribs created page Kannyu (Created page with "'''Kannyu''' (Japanese: 貫入) is a ceramic glaze effect characterized by a network of fine cracks that appear on the surface of glazed pottery. The crack patterns form naturally when the glaze and the clay body contract at different rates during cooling after firing. In ceramics, glazes and clay bodies expand and contract as temperatures change. If the glaze contracts slightly more than the underlying clay during cooling, tension develops in the glaze layer. This tens...")