Beat the tiles by hard things. If the sound is ringing, the higher the degree of vitrified, the better the quality.Can also be left thumb and forefinger and middle finger clampCeramic tile One horn, easy hanging down, with his right hand index finger tap part ceramic tile, if clear and melodious sound is ok, if the sound depressing, ZhiZhuo certainly not ok.
Ceramic tile,Polishing tiles With good hardness, toughness, non-friable lousy is optimal.To ceramic tile pieces scratch each other edges and corners, to check the broken fragments of the broken mark is dense or loose, is brittle, hard or loose, soft, is leave scratches, or scattered powder, such as belong to the former is good who is bad.