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Common sense of gold material
1. In fact, 100% pure gold does not exist. The first reason lies in refining technology, and the second reason is that gold ornaments with connection points must use solder in the process of gold ornaments or gold bars processing.
2. In the process of processing gold ornaments, the solder used is composed of specific alloy materials, mainly composed of gold, with a small amount of silver, copper or tin.
3. According to experts, solders are divided into three types: high solder, medium solder and low solder, with gold contents of 940‰, 920‰ and 840‰ respectively. Pure gold and thousands of gold jewelry generally use solder with gold content exceeding 90% to ensure the gold purity of jewelry. The proportion of solder is about 0.2%. In other K-gold ornaments, the content of solder is slightly higher, but it will not exceed 8%.
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