melody jewelry wholesale Foot gold, three ninety or nine differences

melody jewelry wholesale

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  1. stainless steel jewelry chain wholesale Mainly the golden degree of gold is different:
    three nine refers to gold with a purity of more than 99.90%, and four nine refers to gold with a purity of more than 99.99%.
    Extension information:
    Thousands of gold:
    The gold content is not less than 999, which is called thousands of gold, which is the highest value of jewelry named names. The mark is thousands of gold, 999 gold, GOLD999 or G999. The mark of gold jewelry includes manufacturers' code, materials and purity, such as: X Gold 990, XAU990, X Foot Gold, etc.
    Gold content:
    The gold content in the jewelry 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 detection method and damage testing method. The daily inspection of the jewelry quality supervision department is generally based on non -destructive testing method. Utilize large instrument analysis. 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.
    Wanjin feet gold:
    The gold content is not less than 9.99.9, which is called 10,000 -foot gold, which is the highest value of jewelry in the market circulation. However, it is not among the national standards, and the mark is the printed, 999.9 gold, AU999.9, or G999.9. The mark of gold jewelry includes manufacturers' code, materials and purity, such as: X Gold 990, XAU990, X Foot Gold, etc. Among them, letters X are the manufacturer code. When making jewelry with different materials or different purifications, materials and purity should be represented separately. When the jewelry cannot be printed due to too thin or too small, it should be attached to the logo containing the mark content.
    The purity of gold products is called "form" or "color".
    Data Source: Thousands of Gold
    Data Source: Wanfu Jin

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