Stone is one of the most frequently used building materials in home decoration, but consumers know little about the product grade, quality standards, and national standards. The experts in the home market chamber will explain the expertise of stone varieties, grades and testing to consumers in detail. For the question of how to distinguish the product grade and identify the radioactivity of the product, Yang Xinli, director of the Tianjin Home Market Chamber of Commerce, said that in addition to paying attention to the quality of the material itself, the quality of the radioactive level should be paid attention to when purchasing the stone product, but the naked eye cannot observe it. The level of radioactivity of the product must be tested by professional equipment, so when purchasing materials, it is the most direct, accurate and effective way to ask the dealer for the radioactivity report of the product. "Unlike other building materials, the radioactivity of stone is not measured by simple qualification or disqualification, but is divided into three categories: A, B, and C." Yang Xinli introduced the state in the "Limited Radionuclide Limits for Building Materials" GB6566-2001 Building materials are defined and classified in the standard. The standard stipulates that the production, sales and use of Class A decoration materials are not limited, and can be widely used in interior decoration bay windows, door stones and countertops; Class B decoration materials are not applicable to civil buildings (residential, elderly apartments, hospitals, schools, etc.) The interior finish; Class C finishing materials can only be used for exterior finishes of buildings and for outdoor use. Cao Liyun, secretary general of the Tianjin Home Market Chamber of Commerce, suggested that consumers must cultivate their awareness of rights protection and ask the dealers for radioactivity reports on the products. When looking at the radioactivity report, the key is to see the final conclusion to see if it is "Class A". If the consumer is still not assured of the product, they can also send the product to a professional agency for testing.
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