Q: I use natural stone decoration bedroom floor, walls, there is pollution?
Answer: in recent years, with the gradual understanding of natural stone, with natural stone decoration ground, walls of the family in the growing. According to the January 2002 the implementation of the "building materials radionuclides Limited" Gb6556 - 2001 standard provisions: marble, slate, sandstone stone, free home decoration. The granite is divided into three categories: Class A, in more than 600 granite varieties, more than 95% non pollution, can be used for home decoration; B class, not for residential, old apartments, nurseries, schools, hospitals and other interior decoration; C class, can only be used for building exterior and outdoor places. Should pay attention to in the selection of granite, careful selection of red, green or red spots with large variety and black slate.
Radioactive contamination of natural stone, mainly refers to the nature of radon radioactive elements produced in nuclear decay process. Radon gas is absorbed by the body, will cause harm to the lungs. But the radon half-life is only 3.2 days. If you have a class B or C class family of the decorative stones, as long as the indoor air circulation, reduce radon content will be, such as daily ventilation for more than half an hour the content is almost equal to zero. This special reminder: in the purchase of stone, must from the seller to the green environmental protection certificate.
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