1 thought on “How to ensure the purity of the five -nine gold jewelry in the production session?”
Laura
Five -nine gold jewelry with a gold content of 999.99 ‰ usually uses national standard methods to test methods. For example, the five -nine Hou Dekin of Xinzhangyuan. It can prove the effectiveness of the test results to ensure the purity of the product.
Five -nine gold jewelry with a gold content of 999.99 ‰ usually uses national standard methods to test methods. For example, the five -nine Hou Dekin of Xinzhangyuan. It can prove the effectiveness of the test results to ensure the purity of the product.