The 1990s is the embryonic stage of domestic gold and jewelry industry. Influenced by domestic policy factors, Mengjinyuan brand came into being. Located in the "Sapphire Capital of China", this gold jewelry manufacturing enterprise has gradually entered the public's field of vision by relying on local industrial advantages and technological innovation. At that time, mainland consumers were proud to go to Hong Kong to buy "three nines" of gold, while domestic enterprises still stayed at the technical level of "two nines", and Mengjinyuan was formal gold.

As a domestic gold jewelry OBM, Mengjinyuan has established a jewelry processing machinery technology research and development center, a gold testing center and a jewelry design research and development center, and established a scientific design, production and inspection management system and a perfect quality assurance system. Passed ISO900 1 Quality Management, ISO 1400 1 Environmental Management, OHSAS 1800 1 Occupational Health and Safety Management, GB/T 19022 Metrology Management and SB/T/.

Identification method of gold

1, color

The authenticity of gold can be identified by its color. If the purity is high, the gold surface is yellow, and under strong light, you can see dazzling light, while the fake one is dull because of the addition of many other metal substances.

2. Difficulties

It can also be distinguished according to hardness. The better the color, the softer the gold texture, which is not easy to process. If you bite a little hard with your teeth, the surface is prone to obvious bite marks, while the fake texture is hard and generally will not change after biting.

Step 3 sound

Or by sound. When gold products are thrown naturally, the higher the purity, the dull sound, similar to the sound of "poof-poof, poof-poof", with no rhyme and no elasticity, while the falsetto is crisp and elastic.

The above contents refer to Baidu Encyclopedia-Mengjinyuan