scarf jewelry cross pendants wholesale The difference between Zhou Dasheng's boutique and foot gold

unbranded wholesale jewelry The difference is in color and logo.
The gold jewelry on the market is mostly equipped with the inspection logo of the quality inspection agency, which clearly marked the precious metal material and purity. The difference between thousands of gold and gold is reflected in the purity of gold in gold color, the deeper the color. Without the gold medal, the color of the golden medal is inspected, the luster is red and yellow, and the color is generally more than 95%. Pure gold will flash dazzling light under the strong light.
The difference between thousands of gold and gold is reflected in gold feel. Compared with ordinary gold and silver and copper with the same volume, thousands of gold is obviously large. Holding in your hands has a heavy feeling, this is the "golden pending hand" that people say.
The difference between thousands of gold and gold is also reflected in the golden voice. The high -end gold -footed gold is tossing. When, the sound is loud. Therefore, you can tap gold and distinguish the thousands of gold and gold according to the sound.

In purchase of gold jewelry, first recognize the quality inspection logo of gold jewelry. Most of the gold jewelry sold in the market is equipped with inspection signs from quality inspection institutions, which clearly marked the gold content and weight of the jewelry.
999 gold is also called thousands of gold, and the gold content is not less than 999 ‰; 990 gold is called sufficient gold, and the gold content is not less than 990 ‰; the gold content of 22K gold is not less than 916 ‰; the gold content of 18K gold is not low. At 750 ‰; the gold content of 14K gold is not less than 585 ‰; the gold content of 9K gold is not less than 375 ‰.
The test method
The jewelry mark should contain the manufacturer's code and the name and content of precious metal materials. The appearance quality is mainly the inspection of specific process quality of the overall shape and processing quality of the jewelry.
The jewelry weight, the gold jewelry is calculated based on weight and processing fee. The weight of the jewelry is one of the important indicators. g.
The gold content in gold content is an important indicator of its quality. There are many types of gold content testing methods, which can be divided into chemical analysis methods and instrument analysis methods. Depending on whether the jewelry is damaged during the testing process, it can be divided into non -destructive testing and loss detection method.
The daily inspection of the jewelry quality supervision department is generally based on non -destructive testing method, and the density method combines large instruments such as the X fluorescent spectrum method and electronic probe. Market supervision random inspections are mainly due to loss of detection. The fire test method is a national test method that measures the gold content in jewelry.