2. The external radiation of ceramic tiles to people mainly comes from chemical elements contained in raw materials, such as γ and β rays produced by the decay of radium and thorium. Gamma rays have strong penetrating power, which will penetrate the human body, collide with cells in the body, and destroy human lymphocytes, thus reducing human immunity. Beta rays have a short range and have a great influence on children, but because of their relatively weak penetration, a book can block its penetration.

Pay attention to the following points when using:

(1) Children's rooms should not be tiled.

Because the density of radon is relatively large, it is generally suspended below one meter from the ground indoors. The lower the radon concentration, the greater the radon concentration. Therefore, children's rooms should try not to be tiled. At the same time, because the height of the bed is generally low, people lying on the bed are just in the strong radiation range of radon, so they can open more windows every day to make the air circulate and keep fresh, and also reduce the radiation of ceramic tiles to the human body.

(2) Do not use strong acidic cleaning agents.

Do not use strong acidic cleaning agent when cleaning ceramic tiles, which will lead to accelerated aging and surface pulverization of ceramic tiles, increase the probability of human body inhaling ceramic tile powder and endanger human health, but the radioactivity of ceramic tiles will not increase due to the chemical reaction generated by cleaning agents. Among all the tiles, the ultra-white tiles in polished tiles have stronger radiation, and the precipitation rate of radioactive element radon on the surface of colored glazed tiles is higher than that of ordinary tiles.

(3) It is best to choose matte bricks.

Because radioactive substances are colorless and odorless, if there is no special instrument to measure them, people can't directly distinguish which tiles will exceed the standard in daily life, so try not to decorate all rooms with tiles when decorating. If you want to choose bricks, you'd better choose inferior smooth bricks. If you use polished tiles, try to turn on small lights at home at ordinary times to avoid direct light or reflection affecting your eyes.

(4) Pay attention when buying.

Glaze crack resistance and strength. Good quality tiles have low water absorption. Consumers can drop water on the back of ceramic tiles when choosing, and observe its diffusion degree. It is better to absorb water slowly.

Whether there are pinholes with uneven thickness on the surface of ceramic tile. When you buy it, you can tap the tiles to see if the sound is crisp. The crisper the sound, the higher the texture density and hardness of the tile. You can also scrape the surface of the tile with a hard object. If there are scratches, it means that the glaze is insufficient.

Contrast chromatic aberration. If the tiles have obvious color difference, it will affect the decoration effect. Due to the large number of purchased tiles, it is necessary to sample and compare the products and observe the change of color difference. Generally, those with large chromatic aberration cannot be selected.