Common treatment methods for jade are mainly bleaching, waxing, bleaching, filling (B), dyeing, bleaching, filling (B+C) or dyeing (C). In the laboratory testing process, the jadeite (B goods, B+C goods) that are treated by these two methods are often encountered. The identification of the jadeite by the testing personnel is more to distinguish whether it is A cargo jade or B with the help of infrared spectroscopy. Goods or B+C jade, so the testers mainly rely on infrared spectroscopy for the identification of B goods or B+C jade. However, for the C-Jadeite, it is easy to ignore the identification of it, ignoring the color distribution characteristics of the dyed jade under the microscope. Dyeing jade is a jadeite that has been directly dyed. The jadeite particles used for dyeing are coarser and the small fissures are more developed. Dyeing dyes are various, such as amino dyes, chromates, and purple, green polishing powders commonly used in the market, etc., directly dyeing the surface of jade as a dye. Magnifying the distribution of the color by means of a magnifying glass or a microscope, since the dye enters the jade along the particles or cracks, it is seen that the color of the dyeing is mostly in the form of a mesh, and the precipitation or aggregation of the dye is seen in the larger splitting. The identification of dyed jade can be determined by using a spectroscope, an ultraviolet spectrometer or an ultraviolet fluorescent lamp in addition to magnifying observation under a microscope. The National Jewelry Quality Supervision and Inspection Center (NGTC) laboratory has detected a sample of jadeite. The sample is glass-gloss from the naked eye. The color distribution is uniform and the whole is green. The infrared spectrum reflection is a typical jade characteristic spectrum. The transmission spectrum is The characteristic absorption peak of natural jade, there is no characteristic absorption peak of artificial resin such as epoxy resin. Figure 1, test sample However, it can be seen through the gem microscope that the green color is mainly distributed along the fine cracks of the jade surface (Fig. 2), and there is no color root. Under the beam splitter, an absorption band (650 nm absorption band) is visible in the red zone instead of the three absorption lines of natural green jade. Ultraviolet fluorescence is inert (some dyes are fluorescent). Figure 2. The green dye is distributed along the cracks in a filamentous shape. In addition, there are a lot of green and purple polishing powder on the surface (Fig. 3). It is also mainly observed by microscope and combined with UV fluorescence identification. The polishing powder is seriously residual. The jade that has affected the color of jade itself is directly named dyed jade. Figure 3. Emerald with a lot of green and purple polishing powder on the surface The dyes mainly accumulate in the surface pits and fissures of the jade, which is the most direct evidence for the identification of dyed jade. Therefore, the use of a microscope to magnify the internal and external features of gemstones, especially the distribution of color, is not only important for dyeing jade, but also for many dyed gemstones. ☆ The leather of shoes is the top quality cowhide, but the price is very affordable. Running Sport Shoes,Men's Oxford Shoes,Men's Dress Shoes,Men's Oxford Shoes GDMK GROUP WEIHAI SHOES CO., LTD. , https://www.jinhoshoes.com
☆ Foot design, easy to wear easy to take off, to avoid tedious lacing.
☆ Polyurethane rubber outsole is not only small weight, but also high elasticity. Light and comfortable on foot.
☆ Simple style, classic, very versatile. No matter be rigorous formal attire, still be relatively casual, fashionable suit, can pull off easily.
☆ The bottom of the non-slip lines prominent, not easy to slip.
☆ Golden monkey, with a history of 69 years of domestic goods brand, with solid manufacturing experience as quality endorsement, has long won the national wide praise. "Wear golden monkey shoes, walk the Golden Road", carrying the common memory of several generations, is your reliable choice of shopping!