The purpose of optimizing the pearl before is to improve the grade and increase its economic value. For marine cultured pearls, the pearls of the general color do not need to be changed in color. Only the black pearls are low in output and expensive, so the light pearls are changed to dark colors by the following methods: 1. Dyeing (additional color) method. Put the soaked pearls in the ammonia solution and then place them in the sun or put them in hydrogen sulfide gas to make the pearls black. The resulting brownish black, greenish black, and black tones are very similar to the natural tonal pearls, and the treated color is stable to light and heat. 2. Radiation irradiation discoloration method. The most common treatment of pearls by the radiation color method is black treatment, which is similar to natural black pearls. The method is to place the pearl under the drilling source to be black, and the color is stable to light and heat. The black pearl treated by the method has no effect on the human body due to the extremely small dose. Recently, the color-colored pearls are reduced to a uniform white pearl. The most common and most commonly used method is artificial bleaching. It is only continuously improved in operation and proportioning, and each has its own tricks. The key steps are generally not transmitted. Japan is rich in pearls. It is said that Japan has a wonderful place in bleaching pearls. The fishermen in Liusha Township, Leizhou City, Guangdong Province, spared no expense to buy Japanese patents, and they have greatly improved. Local owners also went to quicksand to visit and learn. Second, the difference between black pearls treated by natural black pearl culture workers 1. The distribution of colors. The dyed black pearls are uniform in color and have a darker black gathering at the location of the holes and cracks. The surface color is pure black, while the natural black pearl is not pure black, but a dark blue black with a slight rainbow-like flash, or black with a bronze hue. 2. Powder method. The dyed black pearl has a black powder and a black pearl whose powder is white. However, taking pearl powder is a destructive test, so be careful when handling it, especially if you can't arbitrarily remove the black pearl without drilling. 3. Particle size method. Most of the black pearls are large mother-of-pearl, multi-column large-nuclear large bead, the particle size is generally less than 9 mm, so less than 8 mm is a round black pearl, mostly irradiated products. 4. Fainting. The black pearls that have been modified by radioactive radiation have a rich color spectrum and a strong metallic luster. 5. Dilute acid method. In some cases, it is also possible to use a cotton ball to dilute some nitric acid (2%) in a place where the pearl is inconspicuous, and the dyed black pearl will make the cotton ball black. This method is a destructive method and should be used less. Embroidery is a general term for various decorative patterns embroidered on fabrics by needle and thread. Embroidery is divided into silk embroidery and feather embroidery. It is a kind of decorative fabric that uses a needle to puncture silk thread or other fibers and yarns with certain patterns and colors on the embroidered materials, and then forms the decorative pattern with the embroidery trace. It is the art of adding human design and production to any fabric that exists with needles and threads. Embroidery is one of the traditional Chinese folk crafts, which has a history of at least two or three thousand years in China. Chinese embroidery mainly includes Suzhou embroidery, Hunan embroidery, Shu embroidery and Guangdong embroidery. Embroidery techniques include: wrong needle embroidery, random needle embroidery, net embroidery, all over embroidery, lock silk, nasi, Najin, Pingjin, Yingjin, Panjin, fluting, scraping, poking, sprinkling, cross stitch, etc. the main uses of embroidery include life and art decoration, such as clothing, bedding, tablecloth, stage, art decoration. Custom Embroidered Patches Near Me ,Custom Embroider,Custom Embroidered Badges ,Embroidered Flower Appliques Shenzhen Longxiang embroidery products Co., Ltd , https://www.lxembroidery.com.jpg)