The whiter the tile, the more toxic it is? Is this true? According to reports, the whiter the color of the tile, the more likely it is to cause cancer, which has a great impact on people's lives.
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Recently, a quality inspection report has pushed the ceramic tile industry, which has always had nothing to do with human health, to the abyss of “quality gateâ€. The "2009 Second Batch of Product Quality National Supervision and Inspection Quality Announcement" issued by the General Administration of Quality Supervision, Inspection and Quarantine announced that the two products "three radioactive ribs limited" were unqualified, and one stone caused a thousand waves, causing huge Responding and panic about "tiles causing cancer." The reporter visited ceramics companies, ceramic industry associations and hospital oncology departments, and interviewed many experts in different fields.
Adding zirconium silicate for "whitening"
According to Wang Bo, senior engineer of Xianyang Ceramic Research and Design Institute, one of the sampling inspection and execution units, the AQSIQ's testing items for ceramic tile products include 10 dimensions, water absorption, damage strength and radioactivity. Why does the detection of ceramic tiles contain radionuclides? Ceramic tiles are neither stone nor metal. Why do they contain radioactive elements? Is radionuclide exceeding the standard harmful to humans? The reporter learned that ceramic tiles are especially polished. In the production process, in order to achieve the whitening effect, zirconium silicate is added in an appropriate amount. Although zirconium silicate itself is not radioactive, some enterprises add excessive amounts to produce ultra-white bricks, which invisibly increases other radioactive elements. content.
Mr. Zhong, a technical director of a well-known ceramics enterprise in Foshan, said that radionuclides, like melamine and other substances, will only be harmful to humans if they reach a certain amount and have long-term effects. The building materials radionuclide limit is natural for building materials. The radionuclide, radium, radon, potassium radioactivity specific activity limit is quite low, compared with the stone radioactive limit standard is almost negligible, it is actually only the state's requirements and protection for the ceramic industry self-discipline.
Tiles are not carcinogenic
For the recent rumors that the radioactivity of the ceramic tiles may cause cancer, Yin Hong, secretary general of Foshan Ceramic Industry Association, firmly denied it. He said that when the "Limited Radionuclide Limits for Building Materials" standard was formulated, some experts believed that "the building sanitary ceramic products are harmful to the human body" lacked medical evidence. In the millennium pottery producing areas such as Jingdezhen in Jiangxi, Foshan in Guangdong, and Tangshan in Hebei, there were no cases of health abnormalities and related medical cases caused by the contact of ceramics with ceramics.
Wang Bo, deputy secretary-general of the National Building Sanitary Ceramics Standardization Technical Committee, said that radioactive elements include long-lived natural radioisotopes such as uranium, thorium, radium and potassium, which are classified into natural radiation and artificial radiation, as long as the radiation dose does not exceed the individual dose limit. Radioactivity will not cause harm to the human body. Generally speaking, the effect of B-type tile radiation on the human body is not as good as the radiation generated by the mobile phone for one minute.
Although the person in charge of the ceramics industry and the experts in the ceramic industry all said in unison that the ceramic tiles will not cause cancer, it will inevitably make the public feel that there is a saying. To this end, the reporter interviewed the director of the Department of Hematology, the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, he said that radioactive elements are likely to cause malignant tumors, generally induced cytopathic, leading to leukemia, lymphoma, skin cancer and other blood cancer . Regarding the radioactive excess of ceramic tiles leading to malignant tumors, Director Chen said that in his clinical experience and domestic case literature, such cases and related records have not been encountered.
Have alternatives but high cost
Domestic disputes about ceramic tile radioactive, and the relevant standards of foreign ceramic industry? Italian Saint Augustine ceramics manufacturer Chen Guowei told reporters that Italy and other world ceramics producing countries have no indication of radioactivity. Because this is the most basic requirement. For setting the radioactivity standard for tiles, it is not easy to say that there is good, no is not good. Chen Guowei also revealed that the testing of foreign ceramic tiles focuses on environmental protection, including the industrial environmental protection index in the production process and the environmental protection coefficient in the production process.
Since excessive addition of zirconium silicate will lead to an increase in radioactive content, is there a safer raw material to replace zirconium silicate? Liang Yiliu, director of the inspection office of Guangdong Provincial Technical Supervision Ceramics Quality Supervision and Inspection Station, said that high whiteness washes mud There is also a "whitening" function, but 10 times of the washing mud can achieve 1 times the effect of zirconium silicate, and the purification process of the panning mud is complicated, and the cost of the tile is soared. Therefore, he suggested that consumers should not blindly pursue whiteness when purchasing ceramic tiles, and try to choose yellowish and grayish ceramic tiles.
Health matters are extremely important, and they have to be treated with caution.
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