B, C type jade long-term wear cancer is not reliable

The artificial jade is harmful, and the epoxy resin is implicated. Looking through ancient books, many books have recorded the benefits of jade. The ancients Pei Yu used to show the virtues of gentlemen. Modern people also regard it as a symbol of increased transportation and social status. The hearts of Chinese love jade are always the same. Looking at the domestic market, all kinds of jade are spread all over the market, and the price ranges from as little as a few yuan to a few yuan to tens of millions of ancient jade. The jade is a matter of concern to everyone. According to national standards, jade jade can be divided into three types, namely, A, B, and C. A goods refers to genuine products that are not naturally processed. B goods use the second-class raw materials, after pickling and glue treatment, the yellowing will occur after a long time. C goods are generally made by artificial dyeing with ordinary white stone and other raw materials, and will fade after wearing for a long time. What we usually call fake or imitation goods means B goods and C goods. Market rumors that B and C jade wear carcinogens for a long time is not reliable. Ordinary jade processing plants select ordinary stone materials, soak them in strong corrosive chemicals, remove various impurities, and the texture of the stone becomes loose; then, the stone is injected with the prepared green pigment, and then the glue is injected immediately. When the glue is solidified and polished, it is a cheap substitute for the color and A goods.

The glue injection mentioned here refers to the injection of epoxy resin. The high-grade liquid epoxy resin has clear texture, and the color is translucent and yellowish after curing. It is heat-resistant, corrosion-resistant and insoluble in water, which can greatly improve the water color and transparency of ordinary stone materials, and is an important process for processing. Bisphenol A type epoxy resin is one of the most widely used resins, accounting for about 90% of the total epoxy resin, and has strong cohesion and adhesion to metals, ceramics, wood, stone, and the like. According to experts, the largest group of epoxy resin consumption in China is still dominated by coatings, accounting for 39% of total demand, and electronic appliances account for 29% of total demand; composite materials, adhesives and others account for 23% of total demand, 6% and 3%. These four industries include various industries in the life, such as the automotive industry, the marine industry, the container industry, the food tank industry, the aerospace industry, the construction industry, etc., and even the power industry that is inseparable from life is also inseparable from epoxy resin. . Epoxy resin, such as transformers, various switches, insulating materials, transformers, etc., are required from the power generation link, the power transmission and transformation, and the power supply.

The amount of acid-base residues used in the artificial treatment of jade is small, and diamines and acid anhydrides are often used as curing agents. These substances are low-toxic substances, which may cause damage to the skin after prolonged contact, but it is difficult to cause cancer. Epoxy resin is a non-toxic resin. The minimum oral lethal dose of white mice is LD50: 11.4g/kg, which has little effect on the human body. It is widely used in aviation, electronic appliances, potting materials, construction and other industries. Some manufacturers also use another cheaper triethanolamine instead of epoxy resin. Triethanolamine is acutely toxic. The minimum oral lethal dose in white mice is LD50: 9110mg/kg, which is much larger than that of epoxy resin. If the body is contaminated and exposed to the product, dermatitis and eczema can be seen on the back of the hands and forearms. According to experts, recently, the price of liquid epoxy resin in East China has risen sharply to 18,000~18,500 yuan/ton, while the substitute triethanolamine is only about 10,000 yuan. The price difference per ton is nearly 7,000-9000 yuan/ton. Some merchants have chosen cheap substitutes for the high-priced profits, which has led to the damage of jade bracelets and other jade artifacts from health care, and market rumors have arisen.

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