Ceramic tiles are divided into five grades, first-class, second-class, third-class and off-grade. As the prices vary greatly, we need to compare them carefully. In addition, when purchasing, we should also pay attention to whether the signs, specifications and color numbers on the tiles and the packaging boxes are consistent, and whether the product certificate, trademark and quality inspection label are clear.

2, look at the specifications:

Standard size is not only beneficial to construction, but also can reflect the decorative effect. Good specification deviation is small, uniform after paving, straight brick joints and good decorative effect. Products with dimensional error greater than 0.5 mm and flatness greater than 0. 1 mm will not increase the construction difficulty, and the effect after decoration will be poor. Whether the size is up to standard can be judged by the target. Put the brick on the plane and see if its four sides are completely consistent with the plane, and at the same time see if the four corners of the tile are at right angles. It is good to report that there are no defects such as concave-convex, bulging, warping, etc., and the error of side length is not more than 0.2-0.3mm, and the error of thickness is not more than 0.1mm.

The higher the accuracy of the side length of ceramic tile, the better the effect after paving. Buying high-quality tiles is not only convenient for construction, but also saves working hours and accessories. Measure the size and periphery of each tile with a tape measure, and the one with high accuracy is the top grade.

3. Hardness:

Ceramic tiles are high-grade, with good hardness, strong toughness and not fragile. Scrape each other with the edges and corners of tile fragments to see whether the broken fragments are fine or loose, brittle or soft, leaving scratches or loose powder. If the former is top grade, the latter is poor quality. Whether the size is standard or not is the key to judge the quality of ceramic tiles. Use a tape measure or caliper to measure whether the diagonal and four sides of the tile are consistent in size and thickness. A good ceramic tile has a crisp sound, indicating a high porcelain content. If the sound is "click" and stubble breaks, it means that there is a crack in the brick. Good tiles are easy to be installed by the master, and the installed effect is standardized.

4. Pattern:

Good ceramic tile patterns and patterns are clear and consistent in color, exquisite in workmanship, without obvious color leakage, dislocation, broken line or inconsistent in depth.

5, color difference:

The color difference of ceramic tiles is directly related to the decoration effect. Not a batch of products, or the same batch may produce color difference. Therefore, in the process of purchasing, it is necessary to sample and compare each packaged product, put the tiles in the same variety and model of bricks, and observe the degree of color difference. Good products have little color difference, the colors between products are basically the same, the colors are bright and even, and they are radiant, while poor products have large color difference and different shades.

The color of ceramic tiles should be uniform, the surface smoothness and flatness should be better, the periphery should be regular and the pattern should be complete. Take out four or five pieces from a box to see if there are any defects such as color difference, deformation and lack of edges and corners.

6. Listen to the sound

Tap with a hard object, the clearer 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 crisp and pleasant, it is the top grade; if the sound is dull and stagnant, it is the inferior grade.

7, dripping test:

You can drop water on the back of the tile to see seepage velocity after the water is dispersed. Generally speaking, the slower the water absorption, the greater the density of tiles; On the contrary, the faster the water absorption, the rarer the density and the better the internal quality.

Precautions:

When looking at the tiles in the exhibition hall, be sure to confirm the model of the tiles. Especially customers who participate in centralized procurement. Many manufacturers have different bricks in the same series, which may be the same pattern and different colors. Models may differ by only one digit. At this time, remember the model accurately and completely to avoid mistakes. There have been cases where customers misremembered the model and sent bricks of different colors. Change back and forth, delaying the construction period.

When arranging to send bricks, you must inform the merchants one or two days in advance. Many customers order bricks in advance and deliver them later. Because merchants have to prepare goods and arrange them, they should inform each other at least one or two days in advance to ensure timely delivery. Some customers are free on Saturday and Sunday. Don't wait until Sunday to call. It is usually difficult to deliver immediately.

When returning bricks, keep the original box. Because there is information such as model number and color number on the packing box. Bricks returned by general merchants will be recycled and repackaged according to the same color number, which can avoid color difference. Generally, you can't return it without a box.

Don't break the remaining tiles, soak them in water or cement them. In this case, they cannot be returned.

Before returning bricks, contact the merchant and ask when to return them, and then get a refund. Generally, the tile industry takes a break, and sometimes the background is not there, so you can't get a refund immediately.