1. It can be tapped, and the sound is clear, indicating that the ceramic tile has high density and hardness, and good quality (if the tile makes a "pop, pop" sound, it means that its sintering degree is not enough, and the texture is inferior. If there is a slight "dong dong" sound, its texture is relatively hard compared to the previous one), (actually, the method is very simple. Knock it with your hands, and the high-density tiles will have a crisp fragrance of glass. Density tiles make a dull brick sound.)

2. Measure the water absorption rate of the tiles. The lower the water absorption rate, the higher the internal stability of the tiles, and the more suitable for spaces with high moisture or moisture content (such as bathrooms, kitchens), and there will be no problems such as black spots. .
3. Pour a glass of water on the back of the tile, the water stain spreads rapidly, indicating that the water absorption rate is high, and vice versa.
4. You can scrape the glazed surface of the tile with a hard object. If traces are left, the quality is poor.
5. Check whether the color of the tiles is clear or not, and see if there are pinholes with the naked eye. The pinholes are easy to accumulate dirt.