5 thoughts on “Why is the color of the gold necklace red?”
Elaine
Gold jewelry refers to jewelry made of gold as the main raw material. The chemical symbol of gold is AU, with a gravity of 17.4 and Mo's hardness is 2.5. Gold jewelry can be divided into two categories: pure gold and K gold in terms of gold content. 1. Gold jewelry is prevented for a long time in a sulfur environment, and red spots may be available on the surface. In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry. 2, the discoloration or fading of gold jewelry is closely related to the human sweat. 99%of human sweats are water, and about 1%are waste and harmful substances in the human body, such as chlorine substitutes, lactic acid, urea ammonia, etc. The printing on the gold jewelry is useful "gold" and the "KG" English letters represent the texture. When indicating the gold content, the word "99" or "24K" indicates that it is pure gold jewelry. The K gold jewelry is marked with the corresponding K number, such as the K gold jewelry marked "18K". %. Extension information:
Classification: 1, gold -plated jewelry is plating a layer of gold on the surface of other metal jewelry, the color is similar to that of real gold jewelry , Golden light, it is difficult to recognize new times. However, the gold -plated jewelry feels lightly, the texture is hard, the teeth are bitter, and it is easy to fade with a long time. 2, color gold jewelry refers to 24K or 22K gold foil on other metal breads, such as the KD of K gold foil is too low, and its softness is poor. The appearance of the golden jewelry is similar to the real gold jewelry. The golden light is sparkling and it is not easy to fade, making it difficult to argue. but carefully observed the depression, angle, back, etc. of the jewelry. You can find that there are uneven gold foil and the phenomenon of raising edges. If there are broken joints on the jewelry, the cross section of the metal material can be seen from the outside. In addition, the feel of the gold jewelry is also lighter, the texture is harder than the pure gold jewelry, the teeth are bitter, and it is not easy to bend. Reference information Source: Baidu Encyclopedia-Gold Jewelry
Reasons: 1. Gold jewelry is prevented for a long time in a sulfur environment, and red spots may be available on the surface. In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry. 2, the discoloration or fading of gold jewelry is closely related to the human sweat. 99%of human sweats are water, and about 1%are waste and harmful substances in the human body, such as chlorine substitutes, lactic acid, urea ammonia, etc. If according to national standard precious metals, the content of sufficient gold jewelry is above 990%, the content of thousands of gold jewelry is more than 999%, and its gold content is not 100%. This shows that although their content is very high, it may contain other impurities. Pucting information: Gold preventing discoloration 1. Avoid direct contact with perfume, cosmetics, shampoo. 2. Try to remove the gold under the chemical venue. 3. Try to swim on the beach as much as possible. 4. Try not to wear as much as possible during chemistry experiments. The items in life are mercury -containing, such as thermometer, pressure gauge, blood pressure meter, cosmetics, drugs, sterilizers, shower gels, perfumes, gums, disposable dry batteries, moisture -proof agents, etc. They all contain trace mercury. Reference materials Source: Baidu Encyclopedia-Gold Reference materials Source: Baidu Encyclopedia-Oxidation response
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New, if you put it in your hands and look at it together, thousands of gold is a little yellow. If you are too red, you should pay attention to chemical gold. If your necklace becomes red after a period of time, it should be the red in the red but not bright, it is caused by your sweat and the dirt on your body.
Gold jewelry refers to jewelry made of gold as the main raw material. The chemical symbol of gold is AU, with a gravity of 17.4 and Mo's hardness is 2.5. Gold jewelry can be divided into two categories: pure gold and K gold in terms of gold content.
1. Gold jewelry is prevented for a long time in a sulfur environment, and red spots may be available on the surface. In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry.
2, the discoloration or fading of gold jewelry is closely related to the human sweat. 99%of human sweats are water, and about 1%are waste and harmful substances in the human body, such as chlorine substitutes, lactic acid, urea ammonia, etc.
The printing on the gold jewelry is useful "gold" and the "KG" English letters represent the texture. When indicating the gold content, the word "99" or "24K" indicates that it is pure gold jewelry. The K gold jewelry is marked with the corresponding K number, such as the K gold jewelry marked "18K". %.
Extension information:
Classification:
1, gold -plated jewelry
is plating a layer of gold on the surface of other metal jewelry, the color is similar to that of real gold jewelry , Golden light, it is difficult to recognize new times. However, the gold -plated jewelry feels lightly, the texture is hard, the teeth are bitter, and it is easy to fade with a long time.
2, color gold jewelry
refers to 24K or 22K gold foil on other metal breads, such as the KD of K gold foil is too low, and its softness is poor. The appearance of the golden jewelry is similar to the real gold jewelry. The golden light is sparkling and it is not easy to fade, making it difficult to argue.
but carefully observed the depression, angle, back, etc. of the jewelry. You can find that there are uneven gold foil and the phenomenon of raising edges. If there are broken joints on the jewelry, the cross section of the metal material can be seen from the outside. In addition, the feel of the gold jewelry is also lighter, the texture is harder than the pure gold jewelry, the teeth are bitter, and it is not easy to bend.
Reference information Source: Baidu Encyclopedia-Gold Jewelry
Reasons:
1. Gold jewelry is prevented for a long time in a sulfur environment, and red spots may be available on the surface. In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry.
2, the discoloration or fading of gold jewelry is closely related to the human sweat. 99%of human sweats are water, and about 1%are waste and harmful substances in the human body, such as chlorine substitutes, lactic acid, urea ammonia, etc.
If according to national standard precious metals, the content of sufficient gold jewelry is above 990%, the content of thousands of gold jewelry is more than 999%, and its gold content is not 100%. This shows that although their content is very high, it may contain other impurities.
Pucting information:
Gold preventing discoloration
1. Avoid direct contact with perfume, cosmetics, shampoo.
2. Try to remove the gold under the chemical venue.
3. Try to swim on the beach as much as possible.
4. Try not to wear as much as possible during chemistry experiments.
The items in life are mercury -containing, such as thermometer, pressure gauge, blood pressure meter, cosmetics, drugs, sterilizers, shower gels, perfumes, gums, disposable dry batteries, moisture -proof agents, etc. They all contain trace mercury.
Reference materials Source: Baidu Encyclopedia-Gold
Reference materials Source: Baidu Encyclopedia-Oxidation response
n00:00 / 00: 3770% shortcut keys to describe space: Play / pause ESC: Exit full screen ↑: increase volume 10% ↓: decreases by 10% →: Single fast forward 5 seconds studio Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
n00:00 / 00: 3770% shortcut keys to describe space: Play / pause ESC: Exit full screen ↑: increase volume 10% ↓: decreases by 10% →: Single fast forward 5 seconds studio Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
New, if you put it in your hands and look at it together, thousands of gold is a little yellow. If you are too red, you should pay attention to chemical gold. If your necklace becomes red after a period of time, it should be the red in the red but not bright, it is caused by your sweat and the dirt on your body.