Diagonal Dimensions Two bricks of the same type are stacked face-to-face, with four corners aligned, one of them turned, and the four sides are always the same size. This method is particularly suitable for the detection of tiles with a smooth surface.
Check the flatness of the two bricks of the same species face to face overlap, four corners aligned, turning one of them, easy to turn the poor quality, otherwise it is good. This method cannot be used to detect antique tiles. The distinctive feature of antique tiles is the random change of surface color and pattern, and the surface can be uneven.
See the water absorption rate is an important indicator of tile quality. Pour a small glass of water on the back of the brick body. The faster the water disappears, the higher the water absorption rate is. The looser the texture, the weaker the strength, and vice versa.
Look at the finish This is an important indicator of the quality of polished tiles. The protective wax on the surface of the polished tile is cleaned with a soft cloth or reagent, placed under light or sunlight, and viewed at an oblique angle of 45 degrees, the brighter the surface, the better.
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