Gold jewelry may change color after wearing for a period of time. Many consumers will think that this is because the purity of gold is not enough, and even buy fake gold ornaments. In fact, discoloration and fading problems are often caused by chemical reactions caused by contact with external substances, even gold ornaments can occur.
The maintenance methods of gold ornaments are as follows:
1, avoid direct contact with highly volatile substances such as perfume and hair gel, otherwise it will easily lead to the fading of gold ornaments.
2. Remove the gold ornaments when swimming to avoid chemical changes on the surface after contact with seawater or pool water.
The chemicals in the detergent will change the color of gold, so the gold ornaments should be taken out before cleaning.
4. Gold is soft and easy to deform, so don't pull necklaces and other accessories to avoid deformation.
5. Wrap it in flannel and put it in a jewelry box when keeping it to avoid mutual friction and damage.
6. After wearing, gold ornaments often lose their luster due to the pollution of stains and dust. At this time, just put the gold ornaments in neutral detergent, soak them in warm water, and then take them out to dry.
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Gold is a simple form of chemical element gold (chemical element symbol Au), which is a soft, golden yellow and corrosion-resistant precious metal. Gold is a rarer, more precious and more valuable metal. Generally speaking, gold in the world is measured in ounces. In ancient China, gold was measured in ounces, which was a very important metal. It is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication and aerospace industry.
The chemical symbol of gold is Au, and the financial English code is XAU or gold. The name Au comes from a story of Aurora, the goddess of dawn in Roman mythology, which means shining dawn.
After the international gold price entered 20 15, it soared all the way. The gold price in new york market rose from $0/200 per ounce to $0/300 per ounce in less than a month. Statistics show that since 20 15, the price of gold futures in new york market has increased by 9.3%.