Question 2: What should I do if the alloy ornaments are oxidized and blackened? It depends on the alloy and material. Many alloys can't be wiped with toothpaste. You can go to the jewelry store on the street, where there are customers who specialize in washing jewelry. It doesn't seem to cost much.
Question 3: How to deal with the recovery of silver jewelry when it turns black? The best way to maintain silver jewelry is to wear it every day, because human oil can produce a natural and moist luster. Contains exquisite three-dimensional silver ornaments made into sculptures to avoid deliberate polishing. If you find that the silver ornaments are yellow, you should first clean up the thin seams of the silver ornaments with a small jewelry brush, and then gently wipe the surface with a silver cloth to restore the original silvery white and brightness. I would like to suggest that if the silver cloth can recover about 80% silver, it is not necessary to use silver to wipe milk and wash water. Silver wipes contain silver maintenance ingredients and cannot be washed. If you don't handle and collect the silver jewelry after wearing it, it is very likely that the silver jewelry will turn black. At this time, you should use a small jewelry brush to clean the fine seams of jewelry, then drop a drop of silver emulsion on the paper towel to wipe off the black oxide on the surface of jewelry, and then use a silver cloth to restore the original brightness of jewelry. After that, remember to do daily general maintenance to prevent the silver ornaments from turning black again. Silver ornaments are hard to turn white after being blackened many times.
The simple treatment of electroplating silver ornaments is as follows:
1. Go to the nearby Chinese medicine store or drugstore to buy a pack of alum first;
2. Boil the silver jewelry you wear with water in a certain proportion (water must be boiled);
3. Take out the silver ornaments and put them in cold water. Use a soft brush (such as a toothbrush) dipped in toothpaste or laundry detergent or salad for cleaning.
4. Blow dry with a hair dryer, and then wipe with suede, as bright as new.
The chemical properties of silver are also relatively stable, and its corrosion resistance is also strong. However, sulfur, nitric acid and oxides in natural media such as air have a certain corrosive effect on silver. After wearing silver jewelry for a long time, sulfur and silver combine to form a black silver sulfide film on the surface of silver jewelry, which begins to show as some tiny spots, and then spreads into pieces to form what we usually call silver scales or silver molds, which turn black and seriously affect the surface color of silver jewelry. When the silver jewelry has become seriously black, the following methods can be adopted:
(1): Soak in the solution of sodium bicarbonate (commonly known as baking soda), add a few pieces of broken aluminum under the first decoration, and heat them together to remove black spots and restore their true colors. The reason is that aluminum reacts with sodium bicarbonate to release hydrogen, which can quickly reduce sulfide black spots to metallic silver and release sulfur.
(2): Buy a pack of developing powder for developing photos, add 1kg water and stir it into a solution, soak the silver jewelry for 5min, then wash it with water and wipe it with a soft cloth.
(3): Wash with 1% hot soapy water solution, then wet the surface with sodium thiosulfate solution, and then wipe with flannel, so that the silver ornaments can be cleaned.
(4) As a cleaning solution, ammonia solution is widely used in traditional jewelry industry, but its effect is slightly inferior to that of phosphoric acid cleaning solution.
What are the tips for maintaining silver jewelry?
Silver jewelry is exquisite in workmanship and moderate in price, which is loved by most people. However, because silver jewelry is easy to oxidize, it will become dull after wearing for a long time. Therefore, the maintenance of silver jewelry is very important.
For the maintenance of silver jewelry, there are some important decisions:
(l) New silver jewelry
For the newly bought silver jewelry, you can apply a thin layer of colorless or light nail polish on the surface, which has high transparency and is beneficial to increase its luster and delay blackening. If you want to remove this layer of nail polish, you can soak it in banana oil, and then rinse it with clear water.
(2) Treatment of slight discoloration
For silver jewelry with slight changes in silver, it can be polished with decontamination powder or toothpaste; Or soak in sodium bicarbonate (i.e. baking soda) solution, and then clean and polish with a soft brush; You can also soak jewelry in a solution made of peeled and crushed Gleditsia sinensis, which contains soap and alkaloids, then soak it in boiling water and wash it with clear water; Or soak the silver jewelry in the soup of Platycodon grandiflorum Zhiyuan, and then wash it with clear water; It can also be soaked in oxalic acid solution with concentration below 50%. The use of all these methods can remove the slightly changed color on the surface of silver jewelry, making it as bright as new and as shiny as silver.
(3) Silver ornaments with spots
For silver ornaments with spots after being wet, you can wipe them off with warm vinegar and soft cloth, and then wash them with water. It can also be polished with detergent, toothpaste or tooth powder.
Usually, every 10 day, a layer of colorless nail polish can be applied to the silver jewelry to keep the luster and delay the discoloration. When wearing silver jewelry, pay attention to sweat, oil and moisture prevention.
Generally, the pure silver ornaments sold in the market are 925 silver, not 999 pure silver, because 925 silver is alloy silver made by adding other metals, and this kind of 925 silver is also internationally recognized pure silver, and the ratio of 7.5% alloy to 92.5% silver is such pure silver. & gt
Question 4: What should I do if the silver ornaments turn black after a long time? When you don't wear it at ordinary times, you should put it away, and it is best to pack it in a closed bag to prevent the surface of silver ornaments from being oxidized and blackened by air. 2, the daily cleaning method: squeeze a little toothpaste on the silver jewelry, add some water, knead it properly until white bubbles appear, then rinse with water to restore brightness. 3. Don't wear other precious metal jewelry when wearing silver jewelry to avoid collision, deformation or wear. 4. Keep the silver ornaments dry, don't swim with them, and don't go near hot springs and seawater. 5. Wipe the surface of silver ornaments with a soft cloth every day to keep luster, but it is best to use a special silver cloth, which contains silver maintenance ingredients and cannot be washed with water. 6. If the silver ornaments show signs of yellowing, clean the fine seams of the ornaments with a small jewelry brush, then drop a drop of silver emulsion on the paper towel to remove the black chlorine on the surface of the silver ornaments as much as possible, and then use silver cloth to restore the original silvery white and brightness of the ornaments. 7. It is suggested that if the silver cloth can recover about 80% silver, it is not necessary to use silver lotion and silver washing water, because these products are corrosive to some extent, and silver ornaments are more likely to turn yellow after using these products. It is difficult for silver ornaments to turn white after many times of blackening. 8, the use of silver cloth, first of all, you have to distinguish whether there is electroplating; Electroplated silver jewelry: that is, the inner layer is pure silver, and the surface is being treated with current. Electroplating is generally divided into electrogold and platinum. The way to identify electroplating is that its surface is brighter than pure silver, like a mirror, with good reflective effect and less oxidation. The simple treatment of electroplating silver jewelry is as follows: 1) First, buy a pack of alum from a nearby Chinese medicine shop or drugstore; 2) Take the silver jewelry you wear as the question 5: Silver jewelry will oxidize and turn black if you don't wear it for a long time. How should you clean it? Tips for maintenance of silver jewelry 】 It is normal for silver jewelry to turn black when worn for a long time. You can soak it in ammonia and baking soda water or wipe it with toothpaste, then rinse it with clear water and dry it to restore luster. If you want to make the newly bought silver jewelry brighter and avoid its discoloration, you can apply a thin layer of transparent nail polish on its surface and then apply it every ten days. If you want to remove nail polish, you can soak it in banana oil and then wash it with water. Silver jewelry without antioxidant treatment is easy to oxidize and discolor. You can take it to a jewelry store for cleaning and polishing; If the oxidation is not serious, you can also let toothpaste rub the surface of jewelry; There is a silver polishing cloth on the market, which can easily polish silver ornaments, but only for silver ornaments with certain hardness and smoothness; If it is a soft necklace or carved jewelry, it is best to soak it in silver jewelry cleaning solution. Avoid putting silver ornaments together with hair gel, perfume and skin care products, because this will lead to the weakening of luster; When taking a bath or washing clothes, you should remove the silver ornaments to prevent alkaline products; Prevent discoloration and deterioration due to long-term contact with sulfur and its compounds; When exercising or doing manual labor, you should try to avoid wearing jewelry, otherwise it will easily cause jewelry deformation or damage. Avoid putting multiple ornaments together, because they have different hardness, and should be stored separately in the frame after use to avoid friction and scratch, which will affect the texture; Some drugs will react chemically with silver ornaments and make them deteriorate, so be extra careful when touching drugs.
Question 6: How to clean the silver ornaments when they are oxidized and blackened? How to clean sterling silver jewelry
The sterling silver ring turned black after a long time. I found a special way to restore it to its original appearance without going to the jewelry store to clean it.
The following are ways to clean and contribute to sterling silver jewelry:
1, with 50C warm water 1000 ml, 200 ml phosphoric acid and 30 g concentrated washing powder, pour the liquid into the ultrasonic cleaning tank for cleaning 100 seconds, and then rinse it with clear water. Household cleaning: pour the cleaning liquid into the container, soak the silver jewelry for 10 minute, then rinse with toothbrush, and then rinse with clean water for 10 minute.
2, and learn to make the oxidation discoloration of silver products back to light. Primary colors, polished surfaces, the simplest. Just wipe it with a silver cloth. If there are cracks in the unpolished surface, it can be cleaned with silver water.
Maintenance of silver jewelry:
1. When wearing 925 sterling silver jewelry, don't wear other precious metal jewelry at the same time to avoid collision, deformation or wear. Even if different fashions are used for a long time, silver ornaments will oxidize and change color whether they are electroplated or not! Therefore, friends who love silver ornaments must learn how to maintain pure silver and extend the bright time.
2. Avoid contact of 925 sterling silver jewelry with water vapor and chemicals, and avoid wearing it when swimming, especially when going to sea.
3. After wearing 925 sterling silver jewelry every day, wipe it clean with cotton cloth and put it in a jewelry box or bag for sealed preservation.
4.925 sterling silver jewelry has been oxidized and blackened, so you can use a soft brush dipped in toothpaste; You can also wash it with soap or detergent by hand; If it is not clean, it can only be washed with silver; 925 sterling silver jewelry should be dried with cotton cloth after washing.
5. Avoid contact with chemicals such as acid and alkali.
6. Please wear jewelry after spraying perfume and hairdressing products.
7. When taking a bath, take off the ornaments and avoid contact with shower gel, soap and other supplies.
8. Please take off your jewelry when you sleep, and avoid wearing it overnight, and your hair will be entangled in the jewelry.
9. Sweat of human body will corrode silver jewelry, so it is best to wash it with clear water after wearing it in summer and keep it dry.
10, pure silver is soft, so be careful on weekdays to avoid rubbing against hard ornaments.
1 1. Please wipe the ornaments with a soft cloth after each wear.
12, stored in a jewelry box in a dark place.
Question 7: What should I do if the silver jewelry is oxidized and blackened? If it is carved or hollowed out, first use a soft toothbrush dipped in fluoride toothpaste (or not) to brush off the dirt on the surface, and then use a flannel (like glasses cloth) dipped in fluoride toothpaste to wipe the silver ornaments (fluoride is the best, fluoride is also acceptable), and the more you wipe it, the brighter it will be.
If you want to go further, you can wait until the last step is finished, and apply silver with transparent nail polish once every once in a while, for example, ten days and a half.
Finally, if you don't wear it for a long time, it's best to isolate the air with a sealed bag.
Question 8: Who can tell me how to prevent silver ornaments from oxidation and blackening? The best way to maintain silver jewelry is to wear it every day, because the oil of human body will make silver jewelry emit warm and natural luster (there are exceptions, of course, some people's sweat itself contains ingredients that make silver jewelry black). When you don't wear it at ordinary times, you should put it away, and it is best to pack it in a sealed bag to prevent the surface of silver ornaments from being oxidized and blackened by air. When wearing, wipe the silver surface with a soft cloth every day to keep it shiny. 2. Don't wear other precious metal jewelry when wearing silver jewelry to avoid collision, deformation or wear. Keep the silver ornaments dry, don't wear them to swim, and don't go near hot springs and seawater. When not in use, you can gently wipe the surface with soft cotton cloth or paper towel to remove moisture and dirt, and put it in a sealed bag or box to avoid contact with air. If the silver ornaments show signs of yellowing, the easiest way is to gently wash the surface with toothpaste and some water. Or use a small jewelry brush to clean up the fine seams of the silver ornaments, and then gently wipe the surface with a silver cloth, and the original aesthetic feeling of the ornaments can be restored immediately. However, this cleaning method will lose some silver. (The loss is about 0. 1 g) Although you may not take the lost silver seriously, the silver jewelry scrubbed with toothpaste will oxidize faster next time! This is because the timely powder in toothpaste will leave scars on silver ornaments, so the area and cycle of oxidation will be faster than now. Try not to use silver lotion and silver washing water, because they are corrosive, and silver ornaments are more likely to turn yellow after using these products. In addition, the silver cloth contains silver maintenance ingredients and cannot be washed with water. ) 5. It contains exquisite three-dimensional silver ornaments carved to avoid deliberate polishing. Here is a detailed introduction to the maintenance method of electroplated S925 sterling silver jewelry: ● If you want to clean the outer layer of electroplated S925 sterling silver jewelry, don't soak it in silver washing water. Daily maintenance as long as it is rinsed with clean water, immediately dry the water with a soft cotton cloth or blow dry with a hair dryer. ● Avoid wearing sterling silver jewelry in hot springs and seawater areas to prevent silver jewelry from discoloring due to contact with sulfide. If you accidentally touch it, please wash it with plenty of water first, and then dry it. ● If there are friction scratches on the surface of pure silver jewelry, it is easy to accelerate the oxidation of silver. Therefore, when the surface of S925 sterling silver jewelry is oxidized to light brown or corroded by chloride (such as swimming pool water), please handle it in time. ● Please seal the silver ornaments when they are not in use, so as not to weaken the surface brightness. ● Frequent wiping can easily reduce the luminosity of this product. When washing clothes, washing dishes and cooking, please take off your ring to avoid chemicals or oil stains affecting its brightness. ● When engaging in strenuous exercise or moving heavy objects, please try to avoid wearing silver jewelry, so as to avoid the silver jewelry being damaged due to friction and collision and the gem being lost. In order to prevent pure silver jewelry from contacting the products of makeup essence, it is suggested to start wearing silver jewelry after makeup.
Question 9: Gold jewelry (ring) fades and turns black. What should I do with toothpaste? Just wipe it clean and dry it, not dry it.