Back to gold jewelry for the first time: the discoloration or fading of gold jewelry is closely related to human sweat. 99% of human sweat is water, and about 1% is waste and harmful substances in human body, such as chlorinated substances, lactic acid, urea ammonia and so on. When these substances come into contact with silver and copper in gold jewelry, they will react chemically to produce silver chloride and copper sulfide, and present dark black chemical salts. This chemical salt often falls from gold jewelry, polluting the wearer's skin and leaving very obvious black spots on the skin. At present, cosmetics have also become one of the indispensable "roles" in people's lives. If it is applied to the skin of the wearing part of gold jewelry, it will undoubtedly provide an opportunity for cosmetics containing chemical substances and gold jewelry that is most afraid of chemical erosion, and the result can be imagined. Some cosmetics also contain some fine hard particles, which can constitute another kind of dirt, thus wearing away gold jewelry. Regional environmental factors may also make gold jewelry lose its bright color. For example, in dry areas, the air contains a lot of primary fine dust, which will form a kind of "human sandpaper" after being polluted by human body, which can abrade gold jewelry into tiny debris and appear local black stains. It is worth mentioning that talcum powder or moisturizer also contains similar particles, which will also overshadow the above-mentioned gold jewelry. Treatment: Brush with soapy water mixed with a little alcohol, rinse and dry. 925 Silver Jewelry Articles: Generally, the silver jewelry sold in the market is 925 silver, not 999 silver, because 925 silver is alloy silver made by adding other metals. Such 925 silver is also internationally recognized as pure silver, with a ratio of 7.5% alloy to 92.5% silver. Jewelry forged with this pure silver is stronger and less prone to wear and deformation. Real 999 sterling silver, as soft as pure gold. How to maintain sterling silver jewelry? The biggest reason for the oxidation of silverware is oxygen in the air, so blocking the air is the best maintenance method. For example, put the silverware in a sealed plastic bag and then put it in a pearl box to block the contact between air and silverware. When the silverware is oxidized, you can use silver washing water or a piece of silver cloth to wipe it, but the silver washing water is more lethal, so please try to wipe it with a silver cloth unless you have to. If it is bright with silver water, it should be picked up immediately and rubbed gently to clean the chemicals on the surface. In addition, soak in 90% alcohol 12 hours, wipe clean and dry; Or squeeze toothpaste on a dry cloth and wipe it directly, and the effect is also very good. Platinum jewelry: I have been longing for it for a long time. When an elegant and beautiful platinum jewelry brings you a good feeling, can you think of how to take good care of your beloved platinum jewelry and make it shine as good as new with you? Here are some simple ways to teach you. When doing housework, don't let the platinum jewelry you wear be contaminated with oil or bleach, oil will affect the luster of the jewelry; Bleaching water will cause spots on jewelry. Although you want to attract attention when you are young, you must not wear platinum jewelry and gold jewelry at the same time, because gold is soft. If they rub against each other, the gold powder will be adsorbed on platinum, which will turn platinum yellow and affect its unique pure luster. If you wear it frequently, you should try to clean it once a month to keep it shiny. You can clean it with a special jewelry cleaner or you can clean it yourself. The correct way is: squeeze the toothpaste on the towel, rub it back and forth with platinum jewelry to remove fine lines and dirt on the surface, then wash it with diluted household detergent, and then rinse it with clear water, and the luster can be restored as new. If your platinum jewelry is inlaid with diamonds, I suggest you send it to the jewelry store for inspection every year, and carry out professional cleaning and renovation in time, so that platinum diamond jewelry can always be worn new. Just like beautiful flowers and plants need careful care, your platinum jewelry needs your care to spend a good time with you. Pearl jewelry: Although the color of pearl is beautiful, it can't stand the test for a long time. Generally, after several decades, pearls will turn ordinary yellow and lose their beautiful luster. This is what the old saying goes, "people are old and yellow." Why do pearl ornaments turn yellow after long use? This is mainly because the physical properties of aragonite minerals that make up pearls are unstable. Over time, it will become ordinary calcite. Aragonite and calcite have the same chemical composition, but their crystal morphology and luster are different. This is the reason why pearls change color. There are some remedies after the pearl turns yellow, that is, soaking in dilute hydrochloric acid can dissolve the yellowed shell and make the pearl reappear its glittering and charming color. But if the color becomes serious, it is irreversible. Wear pearl jewelry after makeup, because any beauty products (powder cake, foundation cream, etc. ) is harmful to pearls, including perfume and hair gel. The pearls worn should be soaked in clear water, washed, dried and then stored, otherwise the pearls will turn yellow easily. Diamond jewelry: add water and washing powder to the container, boil your diamond ring in water for 10 minute to soften the dirt on it, then brush it with toothbrush, rinse it with clear water, then wash it with 90% alcohol, and finally take it out to dry. Turquoise jewelry: Be careful when wearing turquoise jewelry, it can absorb oil. Don't wear turquoise jewelry when applying sunscreen or milk. Because once turquoise is dirty, it is difficult to restore it to its original state. Opal jewelry: It must be kept in a cool place. Because egg stones contain a lot of water, exposure to sunlight or strong light for too long will dehydrate. The nursing method is to soak in water or sweet apricot oil for two days, and it will recover.