Ru porcelain has a unique color with precious agate as its glaze and has been described as "the beauty of a broken cloud in the clear sky after the storm”. The glaze of Ru porcelain is full and bright, with a few bubbles which were called “as sparse as morning stars that flicker under light”. We can see some sparse bubbles embedded in the middle and bottom of the Ru porcelain fractured surface. Observing the glaze surface with a magnifying glass, the bubbles in the middle are like sparse stars in the glaze layer.
The crack stripe on the glaze surface is as thin as a cicada's wings, so it is also called crab claw pattern, ice crack pattern, and fish roe pattern. One of the features of Ru porcelain is the sesame-shaped support pin, this size is rare in other kilns.
The Ru kiln, once located in Ruzhou, has a truly unique story and is one of the five famous kilns from the Song Dynasty. Ru porcelain ranks the first among the five famous kilns in porcelain history and has one of the famous traditional porcelain techniques. This porcelain is still representative of porcelain of the Northern Song Dynasty.
The development of ceramics in Ruzhou promoted the prosperity of the ceramics industry and showed the advanced porcelain techniques of ancient times. Ru porcelain began to be fired from the middle of the Tang Dynasty, thrived in the Northern Song Dynasty, and occupied a prominent position in the history of ceramics in China.”