Standard for Ceramic Mug's Quality

The first grade: A grade product

 the surface without obvious defects, no deformation, no cave, no drop miscellaneous, white porcelain requirements no spots, color glaze requirements uniform flow glaze, no glazed heap.

The second grade: B grade product

The surface without obvious defects, deformation + -0.1CM, no cave, can make a pinhole, no drop miscellaneous, white porcelain requirements 0.1CM above spots, color glaze requirements uniform color No flow glaze. Glaze pile is not obvious.

The third grade product: C grade product

The surface has no obvious flaw, the deformation quantity + -0.2CM, does not have the cave, may make three pinholes, but not on the same side, does not fall the miscellaneous, the white porcelain requests no 0.1 CM above spot, Color glaze requirements uniform flow without glaze, glaze pile is not obvious.

Four products: D grade product

The surface of a cave, deformation: + - 0.3CM, 3 pinhole above, but not a film exists. A drop-off, but not stabbing, white porcelain requirements of more than 0.2 CM spots, color glaze requirements uniform color.