Gold, K gold and platinum jewelry are very popular among you. Sometimes, these jewelry will change color when worn, and many people think that there is a problem with quality. In fact, they have encountered these things!
Some people found that the gold, K gold, and platinum jewelry they bought at the jewelry store were actually white, blackened, and faded. Is it fake? Or is the purity not high enough? In fact, gold and K gold with high purity are also likely to have discoloration. What the hell is going on here, today Boa takes you to understand the real reasons for their discoloration.
First, the reason for the discoloration of gold jewelry
1. Wear it with white jewelry
When gold is worn with white jewellery such as platinum or silver, it is very likely that the metal of the white jewellery will be applied to the gold jewellery or the gold will be smeared on the white jewellery due to the friction between the jewels. This color change is only rubbing. The part appeared, and it was on the surface layer and was scratched.
Therefore, when buying gold jewelry, the jewelry store's shopping guide will usually be very enthusiastic to tell you, do not wear gold and white jewelry together, this will lead to cross-color phenomenon.
2, gold encountered mercury
Mercury, also known as mercury. Gold jewelry touched the substance containing mercury and reacted with it to produce a white gold-mercury compound attached to the surface of gold, so it seems that gold appears white.
The phenomenon of whitening of gold jewelry is mostly seen in those women who love beauty, and rarely appear in men. Most women use cosmetics that contain whitening mercury. Gold jewelry absorbs trace amounts of mercury. Over time, gold jewelry appears white.
3. Contact with other chemicals
Gold jewelry is placed in a sulfur-containing environment for a long time, and the impure material in the jewelry may react with sulfur, so that the surface will produce 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.
Second, the reason for the discoloration of K gold jewelry
K gold is discolored, and there are generally three cases: tarnishing, chemical & physical discoloration, and a black silver film on the surface.
1, contact with human sweat
The discoloration or fading of K-gold jewelry is closely related to the sweat of the human body. 99% of human sweat is water, and about 1% is waste and harmful substances in the human body, such as: chloride, lactic acid, urea, urea ammonia. When these materials come into contact with silver and copper in K-gold jewellery, they produce a chemical reaction that produces silver chloride and copper sulphide, and exhibits a deep black chemical salt. These chemical salts are the main cause of discoloration of K gold.
2, exposure to chemicals
K gold is originally 75% gold plus alloyed materials made of other metals, so the metal is likely to react to chemicals in life. If you are exposed to chemicals that are strong in acid and alkali, you will easily change color, such as washing powder, detergent, cosmetics, soap with other additives, and so on. Otherwise, maybe the first day you just bought it, you will find that your K gold is discolored.
3, subject to friction or bump
K gold is also known as the gold, because it has a very rich color, such as K yellow, K white, rose gold and even black gold and so on. But in this, in addition to K gold is the true color, most of the other colors are based on K gold, and then electroplated with other colors. The most typical example is the black K gold, the black surface is actually a coating. If you are rubbed or bumped, it will reveal the original K gold color, so it looks like it is faded. K Platinum is also the same reason. When it rubs against other hard objects, it will wear to different degrees. When the coating is worn, the true color of the metal will be exposed, and the yellowish white will appear.
Third, the reason for the discoloration of platinum jewelry
In theory, the nature of platinum is very stable and will not deteriorate or fade due to everyday wear. Its luster is always the same. However, there are still many friends who say that the platinum jewelry purchased has turned black or yellow. What causes discoloration?
The following conditions can cause discoloration of platinum:
1, platinum and water
Many people mistakenly believe that platinum is afraid of water. In fact, platinum is not afraid of water. If platinum encounters water or other substances change quickly, this platinum is not true platinum, or the purity of platinum is not enough.
2, is attached to the stain
Platinum itself does not change color and black, but after wearing it for a long time, it will inevitably attach some stains, which may cause the surface of the platinum ring to become dark or discolored. This may happen.
3, wearing housework and cleaning, etc.
When wearing platinum jewelry for housework or cleaning, oil, bleach and various cleaning chemicals can affect the luster of platinum, and even lead to yellowish and speckled platinum.
4, when put together with gold jewelry
Because gold is soft and platinum is harder, when they are put together or worn together, it is easy to cause friction on the surface of gold, and gold can easily turn platinum into yellow, which affects the color of platinum.
Fourth, the color of gold, K gold, platinum jewelry can also restore the original appearance?
1, gold jewelry color
It is recommended to find a local gold store to deal with such a situation. Take the white gold jewelry to the local gold shop and heat it with a professional musket. Because the melting point of mercury is very low, in the heat treatment, the mercury will immediately evaporate, so that the gold jewelry will restore its original appearance. Note: 1. Never use a lighter to burn; 2. After processing, it does not affect the original color of the goldsmith.
2, K gold jewelry is discolored
Lost gloss
It is the most common "discoloration" of K gold. In this case, everyone can handle it at home - put K gold in a diluted neutral detergent, clean it with a soft brush and dry it with a soft cloth. This will wash away the stains on the surface and restore the luster of K gold. And color. Tips: Pay attention to the use of soft brush to wash K gold when cleaning, K gold hardness is not particularly high, if you use a hard brush to easily make K gold scratch. Be sure to use a mild mild detergent.
Chemical & physical discoloration
It can be sent to a special jewelry repair location for refurbishment of jewelry, electroplating, and restore the original color of K gold.
The gold surface has a black silver film
If a black silver film has appeared on the surface of the goldsmith, then a professional jewelry cleaner should be purchased for cleaning. According to the instructions of the cleaning agent, according to the steps, it is very simple to make the jewelry look new.
3, platinum is discolored
You can wash it yourself. You can squeeze the toothpaste on the towel, then rub it back and forth on the platinum diamond ring to remove the fine lines and dirt on the surface. After cleaning with the diluted cleaning solution, rinse it with water to restore the original. Some luster. It can also be cleaned at the jewelry store that was purchased at that time, and it is generally provided for free cleaning.
How to maintain gold, gold, platinum jewelry?
Boer here lists some gold, K gold, and platinum basic maintenance methods that need attention.
1. Place each piece of K gold, gold and platinum jewelry in different jewelry boxes or drawers to avoid scratching.
2, generally wear gold, K gold or platinum jewelry in the final step of dressing, because perfumes, hair sprays and other chemicals will cause damage to K gold jewelry.
3, detergents, disinfectants and other chemicals will change the color of gold, K gold, so do cleaning work, swimming before the jewelry should be removed, in order to avoid chemical changes in the surface
4. In the case of cosmetics containing mercury and lead, chemical reactions may occur, which may cause white spots or fading on the surface of the gold ornaments. At this time, it is recommended to get a gold jewelry store for professional jewelry care, repair or re-plating.
5, regularly clean K gold jewelry, the method is to immerse the K gold jewelry in warm soapy water, gently wipe off the grease with a soft brush, then rinse with water, dry with a hair dryer. It can also be taken out in alcohol for a few minutes, and the general sweat will evaporate with the alcohol. After washing the water, dry it.
6. Regularly clean the platinum jewelry and use the jewelry cleaner sold on the market; immerse the platinum jewelry in soap and warm water solution, then gently rub the platinum jewelry with a soft cloth. Or squeeze the toothpaste on the towel, then rub it back and forth on the platinum diamond ring to remove the fine lines and dirt on the surface. After cleaning with the diluted cleaning solution, rinse it off with water.
7. After wearing, the gold ornaments often lose their luster due to the stains and dust. At this time, just put the gold ornaments in a neutral detergent and soak them in warm water and wash them, then remove them and dry them. Salt and vinegar are mixed into a cleaning agent, which can be used to wipe pure gold jewelry, which can be used for a long time. Wipe with toothpaste or scrub with hot rice soup to restore luster.
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