April 14 from the Tianjin Municipal Quality Supervision Bureau, AQSIQ and the State Standards Committee was recently jointly issued a natural stone ten "new national standard," the name for the natural stone, terminology, specifications, adhesives, both physical and chemical properties were clearly defined, especially for consumers are generally concerned about the problem of radioactive contamination of natural stone has been strictly regulated.

     "The new national standard" for natural stone test methods, names terminology, uniform numbers, decorative building materials specular gloss, natural lumber, natural granite, natural sandstone, natural limestone, bathroom with natural stone, decorative stone adhesive, etc. are strictly limited. And in particular within the stone radioactive exposure index and a detailed index of external exposure limit. The new standards will effectively promote the production of standardized stone industry, while protecting consumers from radiation damage.