Penetration

A Japanese term for the cracks that appear on the glaze surface of glazed porcelain. The origin of the word "craze" is said to be in the imperial kilns. The famous celadon wares of the Southern Song Dynasty imperial kilns in China were characterized by decorations with large and small cracks in the glaze, and the word "craze" (from imperial kiln) came to refer to cracks in the glaze. Craze can occur due to differences in the shrinkage rates of the glaze and the base, or it can occur when the glaze is exposed to wind and snow for many years.

[Yoshiaki Yabe]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

施釉(せゆう)陶磁器の釉面に現れたひび割れについての日本での呼称。貫入の語源は官窯(かんよう)にあるとされる。すなわち、中国の南宋(なんそう)官窯の名高い青磁が、釉(うわぐすり)に大小のひびが入った装飾によって特色を発揮したため、官窯の転じた貫入が釉薬のひび割れをさすこととなった。貫入には、釉薬と素地との収縮率の相違から生じる場合と、釉薬が長年の風雪を経て生じる場合とがある。

［矢部良明］

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