wholesale stainless steel biker jewelry thailand What is AU9999

sunshine jewelry cleaner wholesale Wan Chunjin is marked as (AU9999), also known as Wanfu Gold
gold content that is equal to or more than 999.9 ‰, commonly known as the "Wanfu Gold Series" imprint is "Wanfu Gold" or "999.9 Gold".
AU9999's production process of gold jewelry, using the characteristics of gold high temperature self -dissolving, using laser laser point welding, touching the welding process, realizing the golden self -soluble welding without adding any auxiliary materials, abandoning "add welding medicine" The traditional craftsmanship ensures that the purity of the gold jewelry is not reduced and the purity of the raw materials is achieved.
Pucting information:
If discrimination method
1. Whether gold has white highlights
In materials to cut gold bars or gold jewelry and observe the cut surface with a magnifying glass. If you see white Highlights, because gold and cannot be fused together, indicating that the gold is mixed with 铱.
2, measured the proper gravity
Procketing the weight of a pure gold bar with an balance first, and then put the gold bar in a measuring cup and flood the gold bar. Then put the detected gold bars in a measuring cup, whether the scale of the water rises or decreases. As long as it changes, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable because there is air in gold jewelry.
3, real gold is not afraid of fire refining
The gold bar or gold jewelry burned for a while to observe its changes. Because the oxidation reaction occurs with oxygen in the air, the gold bars with insufficient purity will become gray; and the color of the pure gold will be red after the fire is baked. However, this method may be destroyed to jewelry.
Reference materials Source: Baidu Encyclopedia-Wan Chunjin

Reference materials Source: Baidu Encyclopedia-Gold Differential Mixed Mixing