1. May come into contact with articles containing mercury, such as cosmetics containing mercury. What gold fears most is mercury. Gold will react chemically when it meets mercury, forming a yellow-white substance attached to the gold ornaments, just like fading.
2, high temperature weather causes the human body to sweat more, and the neck and wrist are more prone to sweating, which easily leads to discoloration of gold. In order to avoid long-term contact between gold ornaments and acidic, alkaline substances and sweat stains, try to remove gold ornaments when taking a bath.
3, long-term wear without cleaning and maintenance, the appearance of gold will be dull.
Extended data:
Matters needing attention in gold jewelry care:
1, gold is soft and easily deformed by extrusion or impact, so be careful to wear and store it. Avoid wearing it with platinum and silverware, because friction between metals will try to leave white marks on gold.
2. Gold is an inert precious metal, which will not rust, discolor or fade under normal circumstances. But we should pay attention to the pollution sources in daily life, such as industrial waste gas, detergents, cosmetics, perfumes and so on. It is easy to corrode jewelry and make gold ornaments appear small black spots. The surface of gold is covered with invisible micropores, so it is impossible to fundamentally eliminate the possibility of fine particles adhering, even if it is stored in a jewelry box.
3. If it is polluted by mercury-containing chemicals, white spots or large white spots will appear on the surface of gold ornaments. These white materials are the primary colors of mercury. As for red rust, it is due to the oxidation of gold ornaments after contact with iron, forming red attachments on the surface of gold, just like painting on the wall, which will have a prominent feeling when touched by hand in severe cases.
4. 18K/750 gold (white, red, etc. ) is an alloy ornament containing 75% pure gold and 25% other precious metals. Its hard characteristics can make more diversified styles and unique colors in design and production, and its value is mainly in technology, and its true color is partial to Huang Tiao; If improperly worn, it may damage the metal surface and reveal its original color.
5. General professional jewelry stores will arrange professional cleaning to restore the original luster, which will not affect its weight and has nothing to do with product purity, design, technology and quality.
References:
People's Daily Online-Gold ornaments with a total value of 70,000 to 80,000 yuan are discolored and black or related to improper wearing.