Color is one of the important indicators for evaluating the quality of diamonds. According to the description of the National Standard GB/T16554-2010 "Diamond Grading", the unset and inlaid polished diamonds of the colorless to pale yellow (brown, gray) series are carried out. Color grading, which is also the most common color series in diamonds.
How to see the rating? English letters help you!
In the national standard, it is divided into 12 consecutive color levels according to the color change of diamonds. From high to low, the English letters D, E, F, G, H, I, J, K, L, M, N,
Diamond color grading: The colorimetric method is used to classify the diamond color in a defined environment.
How to compare the color of diamonds? We have professional color stones, the following is the color stone oh~
Color stone: The color starts from the left: D, E, F, G, H, I, J, K, L, M, N
In this way, is the color grade of the diamond at a glance?
Using color stones, diamonds are clearly visible at a glance
Each diamond is compared to the color stone in the lab's diamond grading. The method is simple, and the diamond of the color is required to be placed in the middle of the two color stones closest to it, and the color of the diamond is represented by the lower color level. If the color saturation of the diamond is higher than the highest level D of the color stone, the color level of the diamond is still represented by the D color. If the color saturation is lower than the "N" color stone, use
The upscale faux fox fur and knitting wool products reach the domestic and international high level. Products have been exported to the United States, Australia, Japan, Russia and Vietnam. In addition, according to the report from international accredited testing institutions, the test of formaldehyde in some products is ND level. The company receives high praise from the international specialists.
In the last century, the invention of faux fur advanced human civilization. Faux fur products, which look very similar to the real animal fur, could be produced and no harm to animals. Faux fur products are not only warm, easy care and diverse, but also greatly contribute to protecting animals and ecology for human beings.
At the same time in the last century, a company, specialized in faux fur research and development, was founded on the coast of the beautiful Tai Lake --- Wuxi Shuangda Plush Co., Ltd.
Jacquard Printing Plush,Animal Print Fleece,Printed Micro Velvet Fabric,Plush Curtain Fabric
Wuxi ShuangDa Plush Co., Ltd. , https://www.sd-fauxfur.com