What is the cause of gold fading and is it fake?

There are three reasons for fading:1. **Insufficient color, easy to react with external substances to fade; 2. Gold plating, gold-plated fake gold will fade after long-term wear; 3.

**Due to corrosion, it can be contaminated with human oil and sweat for a long time, causing the amalgam to fade. The fading of the gold may be the reason for the lack of color. Strictly speaking, not in the true sense of the word.

If the color of ** is not high, it is easy to be affected by the outside world, and it will react with some substances chemically, resulting in fading. The fading of the gold may be the cause of the gold plating. Now many ** products are imitations.

The surface is plated with a layer of gold, which is difficult to distinguish between true and fake, but this kind of gold will fade after wearing it for a long time.

Discoloration doesn't have to be fake.

**The more common causes of color loss are:

1.Touched by something, many products in life contain chemical components, when ** with acid, alkali containing substances too much, it may fade. For example, at the seaside, due to the high amount of salt in the air, ** products are more likely to change color.

2.Gold-plated treatment, gold-plated false ** after long-term wear, color fading will occur.

3.Corrosion, long-term contamination of human body oil and sweat, will produce gold amalgam fading.

In addition, insufficient color, improper wearing, or because of surface attachments attached to the surface may lead to color loss. Therefore, if you want to avoid fading, you need to minimize contact with substances containing acids and alkalis, and pay attention to maintenance and cleaning.

Fake ** necklaces are going to fade.

**How to distinguish between true and false:

1) Look at the color: **The higher the purity of the jewelry, the darker the color. In the absence of a gold medal, the general fineness can be determined according to the following colors (based on lapis and gold.

The so-called lapis gold is only contained); The color of dark red yellow is above 95, light red yellow is 90--95, light yellow is 80--85, blue-yellow is 65-70, the color blue with white light is only 50--60, and the yellowish and white is less than 50. The commonly said seven green, eight yellow, and nine red can be used as a reference.

2) Weight: The specific gravity of ** is 19 32, which is heavier than silver, copper, lead, zinc, aluminum and other metals. Like the volume of **heavier than ** more than 40, heavier than copper 1 2 times, heavier than aluminum 6 1 times.

**Jewelry should have a sense of sinking in the hand, and fake gold jewelry feels light. This method does not apply to ** jewelry inlaid with gemstones.

3) Look at the hardness: pure gold is soft, low hardness, shallow marks can be scratched with nails, teeth can leave tooth marks, ** jewelry with high fineness is softer than low fineness, the more copper content, the harder it is, the bending method can also test the hardness, pure gold is soft, easy to bend, the lower the purity, the less easy to bend.

4) Listen to the sound: real gold with a fineness of more than 99 is thrown on the hard ground, which will make a horn sound, with no rhyme and no elasticity. Fake or low-color** sound is brittle and no dullness, generally makes a "dangdang" sound, and the sound has an aftersound, and beats violently after landing.

**Discoloration is generally due to contact with waste and harmful substances in sweat, resulting in a chemical reaction, the formation of silver chloride, copper sulfide and other substances, at this time you can apply some toothpaste, wipe and clean repeatedly with a soft cloth to restore the color。Usually pay attention to avoid contact with perfume, hairspray and seawater to avoid chemical changes.

Human sweat contains some waste and harmful substances excreted from the body, which are easy to produce chemical reactions after contact with a small amount of silver and copper and other metals, resulting in silver chloride and copper sulfide, which will lead to the discoloration of the body.

**If the jewelry has faded, you can apply some toothpaste, wipe it repeatedly with a soft cloth, and then wash it with detergent and clean it with water, so that the color can be restored. If the discoloration is severe, it is best to go to a professional cleaning and processing place and clean it with an ultrasonic cleaner or a potion.

**Storage Considerations

**is a kind of ***, it is best to find a clean, dry place to store, the humid environment is easy to make **surface stains.

Try to avoid contact with volatile chemicals, such as mercury vapor and white after contact, and sweat may also cause white spots to appear. In daily life, cosmetics, detergents, perfumes, etc., are easy to erode, resulting in small black spots on the surface, and contact with these things should be avoided.

**The texture is soft, easy to be deformed by extrusion, you should wear and store it carefully, try not to bump it, and do not put it with other metals, such as platinum, **, etc. It is recommended that you wrap the ** product with flannel and put it in a special safe.

The above content reference: Encyclopedia-**.

You have been deceived, hurry up to the bank and let the bank verify it, it is definitely not 999 pure gold. The specific gravity of other metals in the ginseng does not meet the 999** national standard. If you have an invoice, you can take the bank certificate to sue the store.

Pure ** will never fade and will not oxidize to paulownia color. The ancient tomb has been dug up for hundreds of years, and it is still golden.

**It will not fade after a long time, and the surface with high content will continue to show a dazzling and dazzling color after wearing. However, it will become dirty during wearing, and the dust in the living environment will pollute its original color, making the surface dull. When wearing, you need to wash your body before wearing it, so as not to corrode the surface with sweat and affect the overall appearance.

It won't fade.

I'll send you a question.

Hello dear. There are 3 reasons for discoloration: 1. Insufficient color, insufficient color, easy to discolor due to chemical reaction with external substances; 2. Gold-plated treatment, after gold-plated false ** after long-term wear, it will fade; 3. Corrosion, long-term contamination of human body oil and sweat, will produce gold amalgam fading.

Ask me what is the reason for this?

In general, it is caused by insufficient fineness.

It doesn't fade, just wash it with detergent.

The color will change after a long time, and the store will wash it for free.

No, it may be dirty, you can take it and wash it.

If it is real gold, it will not fade, and the transfer beads I wear have not faded for more than a year.

**Will not be returned, the gilded will.

If it's true, it won't fade.

It's fake, or it's gold-paying.

**How can it fade、、、 ask for advice.

High-purity gold does not fade under normal circumstances, but it will fade when exposed to certain liquids.

First, the reason for the color of the legs.

1. After wearing ** jewelry for a period of time, if you find that it is discolored or faded, you can go to check whether the color of ** jewelry is insufficient, and if so, go to the store to negotiate or complain to the consumer association.

2. After the discoloration or fading of the jewelry and the waste and harmful substances in the sweat of the human body come into contact with the silver and copper in the jewelry, a chemical reaction will occur to produce silver chloride and copper sulfide, and present a dark black chemical salt.

3. Gold will also have chemical reactions when it comes into contact with certain chemicals. For example: mercury, yellow water, bromine vapor, ozone, cyanide, etc.

**Does not fade. As a kind of ***, it has good physical properties, "real gold is not afraid of fire" is that the chemical stability of gold is very high, it is not easy to react with other substances, and there is no need to worry about oxidation and discoloration, even in the molten state, it will not oxidize and change color, and it will still be golden after cooling.

**Features:

**Although it is a very soft metal, it is not as good as lead and tin. Fingernails can be scratched on pure gold, and this softness makes it very easy to work with, but this is not ideal for the makers of ornaments.

Because it is easy to rub the ornaments, make them lose their luster and even affect the appearance, so when making jewelry with **, copper and silver are generally added to improve its hardness. **Easy to forge, easy to spread, can be milled into a thickness of millimeters of transparent and transparent green gold foil, grams** can be drawn into 160 meters of gold wire.

**Sometimes it will fade too. There will be several scenarios:

**Jewelry may change color after wearing it for a period of time, and many consumers will think that this is due to insufficient purity, or even buy fake** jewelry. In fact, in many cases, the problem of discoloration and fading is due to a chemical reaction caused by contact with external substances, even if it is pure gold jewelry.

1. The surface of the jewelry turns red.

There is no 100% purity in the world, and the state stipulates that more than 99% of the gold content is called pure gold, so there will always be other substances mixed in pure gold jewelry.

When gold jewellery comes into contact with acids, it is possible to produce red spots; It may also turn red when left in a sulphur-containing environment for a long time. This is due to the oxidation of other substances in the jewellery.

Second, the surface of the jewelry turns white.

The whitening of gold jewellery is usually caused by a chemical reaction with the gong to produce the gongzi.

Mercury is often contained in daily necessities and cosmetics commonly used by women, and gold amalgam will be produced when it comes into contact with these substances, making the surface of gold jewelry white and brittle.

In addition, there is a condition that can cause gold jewellery to turn white. When ** jewelry and white jewelry (such as silver, white gold, etc.) are worn together, the friction between the two will make the contact parts of the gold jewelry with other jewelry white and leave scratches.

3. **Jewelry turns black.

Many skin care products contain trace amounts of mercury, cosmetics often contain lead, and hair dyes often contain trace amounts of lead, and ** is easy to turn black when exposed to lead. Therefore, when dyeing hair and using cosmetics, you should try not to bring ** jewelry. Therefore, it is best not to wear ** jewelry when using cosmetics or dyeing hair.

In addition, the welding place of ** is often blackened, which is mainly because different manufacturers will use different fluxes when welding, if the gold content of the solder used in the welding is not high, it is easy to turn black when in contact with sweat, which is also the reason why some gold jewelry is easy to change color when worn in summer.

Fourth, in addition to the above 3 situations, ** will also be affected by the environment, such as in dry areas, a large amount of dust attached to the human body will form "human sandpaper", long-term wear may also make gold jewelry wear and tear appear fine debris and accumulate stains black.

Discoloration doesn't have to be fake.

Discoloration is a relatively normal phenomenon, after wearing it for a period of time, there is a discoloration situation, which does not necessarily mean that you have bought a fake**, or it may be because you have come into contact with something. Many products in life contain chemical ingredients, and when they come into contact with substances containing acids and alkalis too much, they may fade. Therefore, fading does not mean that it must be fake.

**Long-term contact with oil-containing products, mercury-containing daily necessities or some cosmetics is easy to dull and discolor. In addition, it is often in contact with metal substances containing platinum, palladium, silver, etc., and is also prone to discoloration. Therefore, when wearing ** daily, pay attention to take it off when bathing or swimming, do not wear makeup, perfume or hair dyeing, and take off jewelry before removing makeup, so as not to change color after contact with chemical orange quality.

**Maintenance method

1. The texture of ** is very soft, silver orange when usually worn, try not to let it collide with items with high hardness, and do not match the jewelry with high hardness of the Fengwu regiment at will for the sake of beauty, so that it is easy to rub and lead to ** deformation, mainly for a single wear.

2. ** is a relatively delicate jewelry, in ordinary times to keep the surface clean, do not cause the accumulation of dust, otherwise for a long time, it is easy to affect the color of the surface, it looks not so bright, it should be taken off when swimming or sports.

3. When wearing ** jewelry, it is best to try to avoid contact with facial cleanser, cosmetics, shower gel and other chemicals, otherwise it will easily affect the color of the surface for a long time, and avoid contact with oil.