First, when purchasing Guanzhu brand ceramic tiles, it is best to go to the brand's specialty store;
Second, identify it from the outer packaging of the product. If you see rough workmanship on the outer packaging of a product, you should be careful;
Third, identify it from the appearance of the product. The surface finish and flatness of inferior ceramic tiles are very poor. Generally, impurities on the glaze of the tiles can be observed with the naked eye;
Fourth, identify from the size of the tiles. Use a small ruler to measure the sample, and then compare it with the size on the package. If the error is large, there is a problem; fifth, the authenticity can also be identified from the manufacturer's address.
Extended information
The testing standards for ceramic tiles are as follows:
GB/T 4100-2015 Ceramic tiles
GB/T 3810.1-2016 Test methods for ceramic tiles Part 1: Sampling and acceptance conditions
GB/T 3810.10-2016 Test methods for ceramic tiles Part 10: Determination of moisture expansion
GB/T 3810.11-2016 Test methods for ceramic tiles Part 11: Determination of glaze cracking resistance of glazed tiles
GB/T 3810.12-2016 Test methods for ceramic tiles Part 12: Determination of frost resistance
GB/T 3810.13-2016 Test Methods for Ceramic Tiles Part 13: Determination of Chemical Resistance
GB/T 3810.14-2016 Test Methods for Ceramic Tiles Part 14: Determination of Pollution Resistance
GB/T 3810.15-2016 Test methods for ceramic tiles Part 15: Determination of lead and cadmium dissolution from glazed tiles
GB/T 3810.16-2016 Test methods for ceramic tiles Part 16: Small color difference Determination
GB/T 3810.2-2016 Test Methods for Ceramic Tiles Part 2: Inspection of Dimensions and Surface Quality
GB/T 3810.3-2016 Test Methods for Ceramic Tiles Part 3: Determination of water absorption, apparent porosity, apparent relative density and bulk density
GB/T 3810.4-2016 Test methods for ceramic tiles Part 4: Determination of modulus of rupture and failure strength
GB/T 3810.5-2016 Test methods for ceramic tiles Part 5: Determination of impact resistance of bricks using restitution coefficient
GB/T 3810.6-2016 Test methods for ceramic tiles Part 6: Wear resistance of unglazed tiles Determination of depth
GB/T 3810.7-2016 Test methods for ceramic tiles Part 7: Determination of surface abrasion resistance of glazed tiles
GB/T 3810.8-2016 Test methods for ceramic tiles Part 8: Determination of linear thermal expansion
GB/T 3810.9-2016 Test methods for ceramic tiles Part 9: Determination of thermal shock resistance