Is there any harm to the body with marble? How to reduce harm?
Prior selection methods and standards. According to the level of radioactive stones are divided into A, B, C three categories, according to regulations, only a class can be used for home interior decoration. There are two main types of marble and granite stone, marble radioactive is generally lower than granite, most can be used for indoor decoration, and granite indoors should not be used, especially not in the bedroom, the elderly, children room use. According to the test, the color of the stone is different, the highest is red and green, white, black is the lowest. Therefore, consumers should be careful to choose red, green or granite varieties with large red spots.
Purchase contract to sign the invoice. Contract and invoice is an important guarantee of rights, consumers should require the seller to specify the product name, specification, grade, quantity and price in the contract, and require the use of clear criteria for testing. It is best to ask the seller to provide the certificate of conformity of the product, the inspection report by the legal department or the certificate of product radioactivity. If conditions permit, it is best to send samples to the testing department for inspection. Now, the emergence of the so-called "international A-class", "super" stone, is part of the manufacturers to mislead consumers, consumers should pay attention to prevention.
The method of dilution pollution after laying. Harmful radon half-life is only 3.2 days, indoor radon concentration in the door after the opening of the window after 20 minutes -30 minutes can be reduced to the outdoor level. Therefore, the easiest way is to strengthen the ventilation. Just renovated the room is best to be able to detect, if the test structure is not qualified, can be used to reduce radiation paint or install lead-free protective plate, to prevent radon released from building materials. If radioactive target is too high, the stone must be replaced immediately.