1. Why does gold jewelry turn black after wearing it for a long time?
The reasons for blackening of gold jewelry include wastes discharged from the human body and harmful substances such as chlorinated substances, lactic acid, urea ammonia, etc., which will react with silver and copper in gold jewelry to produce a chemical reaction to produce dark black silver chloride and copper sulfide. This chemical salt sometimes falls from gold jewelry and can also contaminate the wearer's skin, leaving a very noticeable black smudge.
Maintenance method: It is the easiest way to clean with mild soap and soft brush (baby toothbrush). Avoid using toothpaste containing abrasives. The water column can also replace the soft brush. The washed gold ornaments can be dried with an old towel of cotton wool texture or air-dried on a towel.
2. Why does gold jewelry lose its luster?
For a long time, gold jewelry has no luster, and everyday wear or environmental factors may cause the gold jewelry to lose its bright color. Wearing it for a long time will cause oxidation of the metal surface and lose its original luster. Environmental factors, such as dry areas, contain more fine dust in the air. When contaminated with the human body, it will form a kind of "human sandpaper", which can rid the gold jewelry with extremely fine debris and local black stains. It is worth mentioning that the talcum powder or moisturizer also contains similar particles, which will also eclipse the gold jewelry as mentioned above.
Maintenance method: It is safe to clean the gold with ultrasonic. Don't wear gold ornaments to swim in the pool. The hot environment is not suitable for storing gold. When cooking, you should pay attention to avoid the hot smoke from damaging the gold ornaments.
3. Why does the weight of gold become lighter?
As the saying goes, gold is less, and the gold weight in gold jewelry will be worn less and less, but this quality consumption is invisible to the human eye. At present, cosmetics has become one of the "characters" indispensable to people's lives. If it is applied to the skin of the gold jewelry wearing parts, it will undoubtedly provide opportunities for cosmetics containing chemical substances and gold jewelry that is most afraid of chemical substances to smash. The result can be imagined. Some cosmetics also contain some fine hard particles, which can form another type of dirt, thus consuming gold jewelry.
Maintenance method: Avoid gold jewelry and cosmetics, skin care products, before going to the barber shop, it is best to get rid of your gold ornaments, shampoo may also consume your gold.
4. Why does gold turn white?
1. The main reason for the whitening of gold is that gold forms mercury amalgam (amalgam) in the presence of mercury. There are a lot of daily necessities that contain mercury, such as a lot of cosmetics. If you don't pay attention to contact with gold jewelry, gold amalgam will be formed, so that the color of the gold jewelry will become white and brittle;
2. When gold is worn together with white jewellery such as white gold or silver, it is very likely that the metal of the white jewellery will be smeared on the gold jewellery or the gold will be smeared on the white jewellery due to the friction between the jewels. The rubbed parts appear only on the surface and are scratch-like.
Maintenance method: Develop the habit of first wearing makeup and finally wearing jewelry, and reduce the direct contact of cosmetics with jewelry. You can go to the store regularly for free cleaning. Avoid rubbing against other metals and store different jewelry separately when placed.
5. Why does gold turn red?
Although there are no naming rules for thousands of gold and 10,000 gold, the gold content is less than 100% because of the purification technology and the hardness requirements of the jewelry. This means that although they are high in content, they may contain other impurities. Gold jewelry is placed in a sulfur-containing environment for a long time, and the surface may have red spots. In addition, when gold jewelry is in contact with acid, red spots may also occur, which are the result of oxidation of the internal impurity elements on the surface of the jewelry.
Maintenance method: Avoid contact with any corrosive items, and choose a qualified jewelry box when storing.
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