1. See if there is a factory name, address and trademark on the outer packaging of ceramic tiles, so as to avoid buying three-no products (except for changing packaging for export to the domestic market).
2. Look at the glaze of ceramic tile, whether there are pinholes, spots, cracked glaze, glaze texture, trauma, color difference, delicate pattern, no obvious color leakage, dislocation, broken line or different shades.
3. See if the tiles are deformed and measure whether the two diagonal lines of the tiles are equal. Bricks with flat sides are easy to build. (Visual inspection method: put the ceramic tile on the plane to see whether its four sides are completely consistent with the plane, and at the same time see whether the four corners of the ceramic tile are at right angles, and then put the ceramic tile on the same variety and model to observe its color difference; Test method: Take out a brick, align two pieces, and the smaller the gap in the middle, the better. If it is a pattern brick, it must be made up of four pieces into a complete pattern, and it is also necessary to look at whether the pattern of the brick is coherent and clear. Put these bricks on one by one and compare their sizes. The allowable deviation of small brick is ±65438±0mm, and that of large brick is 2 mm.. )
Excellent products: at least 95% of the bricks have no defects when observed vertically at a distance of 0.8m;
Qualified products: When observed vertically at 1m, at least 95% of the bricks are free from defects. 1. It can be tapped, and the crisp sound indicates that the porcelain density and hardness of the ceramic tile are high, and the quality is good (tap the floor tile gently by hand, and if the brick makes a "poof, poof" sound, it indicates that its sintering degree is not enough and its texture is poor. If it makes a slight "pop" sound, its texture will be harder than the previous one (in fact, the method is very simple. Knock by hand, high-density tiles will knock out the crisp taste of glass. Low-density tiles make a dull tile sound. )