Kannyu (貫入)
Literally translated as "penetrating/piercing in" and often referred to as a crackle glaze, this type of glaze contains a network of hairline cracks, which often expand across the entire surface of a vessel. This intentionally-produced decorative effect is achieved during the firing process and is the result of pairing glaze and paste materials that have different rates of expansion. Crackle glazes are common on Satsuma-style wares (Creuger et al. 2006:37, 289).
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