What is an ice crack? Ice plum pattern? Who is the representative?

Ice cracks", also known as the original open piece, is a variety of ancient Longquan celadon, because of its pattern such as ice rupture, lobes stacked, three-dimensional and called. In the brother kiln of various glaze crack pattern piece, "ice crack" ranked first, known as "brother kiln character, grain take ice crack for the top" reputation. Because of its unique crack in the firing process, showing the infinite natural beauty. Unfortunately, the firing of "ice crack" process in the Song Dynasty was lost.

A natural cracking phenomenon of porcelain glaze. Cracking for two reasons: one is the molding of billet clay along a certain direction, affecting the molecular arrangement. Secondly, the blank, glaze expansion coefficient is different, the glaze layer shrinkage rate when cooling after baking. Originally a shortcoming in porcelain firing, but people intentionally use the law of cracking to create open glaze, as a special decoration of porcelain. To the song dynasty brother kiln products are most famous. Open glaze in the production can be divided into two categories: a filling type, in the firing of the glaze cracks filled with soot, etc., the pattern is black; can also be filled with copper sulfate and other coloring agents in the cracks, brown-green pattern. Another type of covering type, after baking on the bottom glaze covered with a layer of color glaze, baking again, showing cracks, revealing the bottom glaze color. Open according to the cracks sparse and different graphics were called ice cracks, caviar pattern, a hundred garbage broken, crab claw pattern, cow hair pattern and eel blood pattern, etc.

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