Antique bricks belong to glazed bricks, and the development trend of the blanks is mainly porcelain (water absorption rate ≤0.5%), enamel (water absorption rate 0.5 to 3%), fine enamel (water absorption rate 3 to 6) %), the enamel (water absorption rate of 6 ~ 10%) can refer to the 4100·1 porcelain brick in the GB/T4100-1999 ceramic tile standard; 4100·2炻 tile; 4100·3 fine brick and 4100·4 Enamel bricks. Popular antique bricks are mainly matt, and all polished glazed tiles are printed on matt glaze (or a matt glaze on the bottom glaze). Finally, a layer of transparent glaze or transparent dry granules is polished and then polished.
Glazed bricks all involve a sensitive problem, namely the suitability of slabs and glazes. In order to prevent and eliminate the late cracking, the water absorption rate of the green body must be reduced, resulting in an increasing proportion of porcelain bricks and a tendency to completely replace other materials.
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