At first glance, it mainly depends on whether there are black spots, bubbles, pinholes, cracks, scratches, stains and lack of edges and corners on the surface of ceramic tiles. Vitrified bricks should also pay attention to whether there are defects such as missing throwing and grinding.
The second step is to weigh and test the feel of the tiles. Products with the same specifications, good quality and high density bricks, feel heavy; On the contrary, inferior products feel lighter.
Listen and tap the tiles, and identify the quality of the tiles by listening to the sound. Tap with a hard object, the clearer and sweeter the sound, the higher the porcelain degree and the better the quality. You can also hold a corner of the tile with your left thumb, forefinger and middle finger and hang it down easily. Tap the middle and lower part of the tile with the index finger of your right hand. If the sound is clear and pleasant, it will be the best. If the sound is dull, the dullness will be the lowest.
Four splicing: randomly take out four products of the same specification and model for splicing. Through this step, you can check the tile size, flatness and right angle.
5. Drop water on the back of the tile to see how fast the water permeates after it is dispersed. Slow water absorption means high density and good quality.