Natural stones all have a certain degree of radioactivity. Therefore, when consumers choose, they must be careful and use them scientifically. Below, briefly introduce three issues that need attention when selecting and using natural stone.
First, when you purchase, you must sign a contract to open a ticket. Contracts and invoices are important safeguards for rights protection. Consumers should require the seller to specify the name, specification, grade, quantity, and price of the product in the contract, and require clear criteria for testing. It is best to ask the seller to provide a certificate of product qualification, an inspection report certified by the statutory authority, or a product radiation certificate. Conditions allow, it is best to send the sample to the testing department for testing. Nowadays, the so-called "international A-class" and "extraordinary-grade" stone products appear on the market is a way for some manufacturers to mislead consumers. Consumers should pay attention to prevention.
Second, master the selection methods and standards in advance. China's stone is divided into A, B and C according to the level of radioactivity. According to regulations, only Class A can be used for home interior decoration. There are two types of stone, marble and granite. The radioactivity of marble is generally lower than that of granite. Most of them can be used for interior decoration. Granite should not be used in large quantities in the room, especially in the bedroom, the elderly and children's rooms. . According to the test, different colors of stone can be red, green or granite with red spots.
Third, the method of diluting pollution should be adopted after laying. The half-life of harmful radon is only 3.2 days. The indoor radon concentration can be lowered to the outdoor level 20 minutes to 30 minutes after the door opening. Therefore, the easiest way is to increase ventilation. The room that has just been renovated is best able to be tested. If the test structure is unqualified, you can use radiation-reducing paint or install lead-free protective plates to prevent the release of cesium from building materials. If the radioactive index is too high, the stone must be replaced immediately.
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