You may not know that the gold store sales staff is actually doing one thing every day: burning gold. This is to meet the needs of some customers who need to trade in. But before the renewal, they want to check the authenticity and purity of gold jewelry.
It takes a certain amount of experience to use a high-temperature open-fired roasting gun against a gold jewellery for a while. If you turn Huang into financial, it would be too extravagant.
Use the fire to identify the jewelry to burn red (do not let the jewelry melt and deform), observe the color change after cooling, if the surface is still the original gold color is pure gold; if the color is darkened or blackened to varying degrees, it is not pure gold. Generally, the lower the color, the stronger the color, and all the black, indicating that it is a fake gold jewelry.
After the fire is grilled, use a pair of tweezers to clip the jewelry to one side, and then check the color of the jewelry.
After the gold necklace has been fired, it still maintains a golden yellow color. It looks good in color and belongs to "real gold."
After the fire, the gold jewelry, known as waste gold in the industry, needs to re-enter another processing procedure and become a new gold jewelry.
The next process: weighing.
In general, the actual weight of gold jewelry is slightly different from the weight indicated by the manufacturer. In addition, the weight of the customer will be significantly different when worn for a period of time, but this number should be kept within a certain value.
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