“The same 'Indian Red' marble was used in the aisle and bay window at home, but recently the marble color of the bay window was noticeably faded. Please see the insider, because I bought the dyed marble.” Last week, Mr. Jiang, Xinyijiayuan, told his reporters about his troubles. He worried that the colored stones would hurt his family. To this end, the reporter conducted a survey to uncover the shady black stained marble.

Phenomenon: Dyeing marble is ubiquitous

It is reported that when the reporter visited the marble distribution market in Banqiao, it was found that marble dyeing has become a “conventional weapon” in the industry, and the merchants did not evade it. Ms. Fang, a female boss of a stone shop called “Yinyan”, told reporters that consumers are now very picky. The choice of marble should be consistent. How can natural stones be consistent? In order to cater to customers’ appetite, they can only “color”. "". In addition, some of the stone will collide and damage during mining, transportation and processing, and can only be repaired and colored later, and everyone in the circle will do so.

A person in charge of the marble franchise department named "Zhengshi Shang" said that "black gold" marble is divided into several grades, the price ranges from 120 yuan / m2 to 800 yuan / m2, the difference between different grades is the level of the material and The area is different. However, the reporter wiped the surface of the "black gold" marble sample on the two showcases in the store, and wiped the palms with black. The person in charge said frankly that in order to make the stone "sell" better, brushing the wax is normal. A stone business owner revealed to reporters that many "China Black" are generally dyed with stone materials costing tens of millions of square meters, and then sold at a price of five or six times. "Gemstone Green", "Indian Red" and "British Cui" these relatively high-grade natural stones can not escape the fate of dyeing and fake.

Hazard: Dyed marble is harmful to health

The reporter checked it online and found that many "marble staining secrets" were sold in public. Then, what harm does these dyed marbles have on the human body? Gu Jianhua, an engineer at the National Building Materials Quality Supervision and Inspection Center (Nanjing), said that indeed, the dyed marbles are quite beautiful, and many consumers are deeply involved. At present, the principle of most dyeing techniques is chemical reaction, and most of the dyeing pigments are made by blending oxalic acid, sulfuric acid, and pigment. There are also colored materials such as ferric oxide coated on the surface of the stone, which will not fade easily. However, counterfeit stone made by chemical color spraying usually begins to fade after one or two years. Especially after making the window and the countertop, the harmful chemical dyes containing benzene are more likely to get into clothing and food. In the process of fading, the dyed stone used as the floor decoration material gradually oxidizes harmful substances such as benzene and formaldehyde in the dye, which also pollutes the indoor air and causes certain harm to the health of the family.

Weapons: easy to distinguish dyed marble

Lin Wenmu, the person in charge of Jiangsu Lianfeng Stone Company, pointed out that although the phenomenon of decorative stone staining is common in the market, as long as consumers pay more attention, it is not difficult to detect the bottom. For example, natural stone will have color difference, and dyed stone tends to be dark and uniform in color, with small color difference, and the surface gloss is not natural, and it is relatively rigid.

The most direct and effective way to distinguish is to look at the side of the stone or the incision. It can clearly find the level of penetration of the dyed stone. The surface is dark and the middle color is light. In addition, dyed stone generally has a layer of wax, as long as the surface of the stone is baked with a lighter, it is seen that the wax melts, it is likely to be dyed. Some large stone companies pay attention to the brand and product quality, and generally do not easily make a fuss on the stone surface. Due to its high hardness, wear resistance, oil stains and stains, natural marble has become the material of choice for many home decoration. The price of the marble on the market is low and no brand should be chosen.

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