1 thought on “What knowledge should I understand gold?”
Joyce
Gilling The industrial use is more gold -plated, generally electroplating, and gold water. Most PCBAs or electronic chips are plated on the tin. There are also instructions. Generally, metal iron, copper, zinc, steel, tin can be plated. platinum In the classification of minerals, platinum elements are naturally platinum, including 铱, 铑, 钯 钯 钯Platinum 4 natural element minerals. They exist in the same phenomenon of the same phenomenon in each other, thereby forming a series of types of quality of the same elephant mixed crystals. At the same time, the ingredients often include iron, copper, nickel, silver and other elements. When their content is high, they constitute the corresponding species. Platinum elements are alternately shaft -crystal systems, and single crystals are very rare, and occasionally small grains of cube or octopus are produced. Generally, there are irregular granular, branches, grape -shaped or block shapes. The color and strip marks are silver -white to steel gray, metal luster, opaque, no rheology, jagged fracture, extensible, and is a good conductor of electricity and heat. Metals melted by platinum elements include gold, gold, platinum, gold, etc. 1. N Gold mainly melted from nature. Color silver -white, similar to platinum, metal luster. Hardness is 4 ~ 4.5. Relative density 12. The melting point is 1555 ° C. Chemical properties are more stable. Because the output is larger than platinum and gold, the value is low, and it is rarely used to make jewelry. . N Gold is mainly refined by nature. It is a rare precious metal. The color is silver -white, metallic luster, opaque. Hard 4 ~ 4.5, relative density 12.5. The melting point is high at 1955 ° C. Chemical rewards are stable. Because the golden gold is resistant to corrosion and the gloss is good, it is mainly used for the electroplating industry. It plated it on the surface of other metals. 3. N Gold is mainly refined by nature 铱 or ore. The color is silver -white, with strong metal luster, hardness 7. The relative density is 22.40, but it can be pressed into foil or filament at high temperature but it can be pressed into filaments at high temperature. The melting point is high, up to 2454 ° C. Chemical properties are very stable. It is mainly used for manufacturing scientific instruments, hot electric puppets, resistance, and so on. High -hardness and tadpole platinum alloy are often used to make nibs and platinum jewelry. 4. platinum The is picked by natural platinum and coarse platinum ore. Because "platinum" is combined by the word "gold" and "white", the color is silver -white, so it is also called "platinum". Silver white, metal luster, hardness 4 ~ 4.5, and relative density is 21.45. The melting point is high at 1773 ° C. Rich ductility, can be pulled into a fine platinum silk, rolled into extremely thin platinum foil. The chemical properties are extremely stable, insoluble in strong acid and strong indulgence, without oxidation in the air. It is widely used in jewelry industry and chemical industry, and is used to create high -grade chemical utensils, platinum pots, and catalysts that accelerate chemical reactions. . Types of platinum . Pure platinum The highest color of platinum. Commonly used for making engagement rings to show the pure virginity of love. Many people think that inlaid diamonds with gold may cause diamond yellowing, which greatly reduces the price of diamonds. With platinum inlaid diamonds, the pure white color of diamonds can be kept, especially as an engagement ring. Platinum inlaid diamonds with platinum are both white and crystal. However, although platinum has higher hardness than gold, inlaid diamonds and jewelry are still insufficient. They often need to be mixed with * gold to make * platinum alloy inlaid diamonds. . Platinum gold alloys composed of 铱 and platinum. The color is also silver -white, with strong metal luster. High hardness. The relative density is also large and chemical, it is an excellent platinum alloy jewelry material. Depending on the content of hinge and platinum, it can generally be divided into three types: 10 % 铱-platinum alloy 21.54 1788 ℃ 15 % 铱-platinum alloy 2159 1821 5 % 铱 铱 铱-Clatinomin 21.50 1779 ° C . K white gold The white alloy made of gold and other metals. Metals such as gold and nickel, silver, copper, zinc and other metals are selected into a white alloy, which is called "K platinum". The color of K platinum is the same as the K gold identification, such as 18K platinum and 14K platinum, of which the gold content is 75 % and 58.5 %. . The identification of platinum and similar metals platinum r r silver white and strip marks, hardness of 4 ~ 4.5, relative density 21.45, stable chemical properties, insoluble in ordinary acids as their identification characteristics, and it is easy to identify with similar metals. The silver and silver distinguishes with relative density, hardness, and stable chemical properties. Although silver is silver -white, the relative density is 10.53, only 1/2 of platinum; and low hardness and no flexibility. Therefore, it can also be left with nails. Folding and difficult to recover; coupled with the unstable chemical properties of silver, the nitric acid will be dissolved and the nitric oxide gases will be released. Platinum is insoluble in nitric acid, and it can be dissolved quickly in the heated king water. At normal temperature, its dissolution speed is extremely slow. Generally, it is difficult to detect the naked eye. platinum is a very good catalyst. Using this feature, you can quickly identify platinum The commonly used hydrogen peroxide reaction method. The specific method is to take a little measuring powder. Among them, if the platinum is tied, the hydrogen peroxide rolls up immediately to break down a large amount of oxygen. The platinum after the response is still unmoved, and it can be recycled (it only accelerates the decomposition); Aluminum and other reactions have no such reaction. pure gold The theoretically 24K gold is 100 %pure gold, but generally reaches 99.99 %, it is called sufficient gold, 24K gold; The proportion of gold is 14/24. It is used to print 14K or 18K on the jewelry, indicating the ingredients of the gold. Platinum is the largest and purest metal in the metal. Of course, it is also the most expensive. There is always a little loss every time gold or silver scratches or polished, while platinum does not. The golden and silver claws that control diamonds and other gems will wear it with continuous use, so they need more metals to strengthen, but platinum claws will not. The platinum jewelry mostly contains 90-95%of pure platinum, and the rest consists of 铱 or 钯. Because platinum is strong and durable, platinum jewelry can be used for life. The text "PT number" refers to its metal purity or quantity of each platinum jewelry, and PT950 gold is a pure 100 % platinum.
gold, this metal will not lose luster, rust or corrosion. However, although it is strong, it also has a strong ductility. Pure gold is too soft and cannot withstand the tension of daily wearables. Gold jewelry has different pure metal percentage, and the measurement unit is opened. It can increase the strength and durability with other metals such as silver, copper, nickel and zinc. The text "K number" refers to its metal purity or quantity of each gold jewelry, and 24K gold is 100 % gold. 24K gold jewelry is too soft. Pure gold jewelry is generally 18K gold (75 %), and the usual gold jewelry is 14K (58.3 %). 12K (50 %) cannot be made of jewelry, and 10K (41.7 %) is the legal golden weight bottom line in the United States, otherwise it will not be regarded as real gold. The color of gold jewelry is manifested in two aspects: the type of metal alloy and alloy percentage. Since 18K and 14K gold jewelry have high purity, their yellow is more saturated. Obviously, 18K gold jewelry has a relatively saturated yellow color, while 14K gold is the first choice for the behind the earrings and bracelet buttons because of its strong strength.
Golding gold: It is to use the electrolytic principle to plating a layer of golden film or platinum film on the surface of the metal substrate. Gold is a natural product that exists in a free state in nature. According to the different sources and the different contents of the content, the content of raw gold and cooked gold. This gold, also known as natural gold, waste gold, and original gold. It is the object of cooked gold. It is a gold that is unlimed from the mine or river base layer and has not been melted and refined. There are two types of gold and ore gold and sand gold. Mine gold, also known as the alleged gold, produced in mines and gold mines. After mining, crushing, and washing, large gold can be picked directly, and the small grains can be dissolved in mercury. Mine gold is mostly accompanied by other metals. Among them, in addition to gold, there are other metals such as silver, platinum, and zinc. Before other metals were proposed, it was called a precursor. The other metal components produced in different mines are different. Therefore, the percentage is different, generally between 50%-90%. The sand gold is produced at the bottom of the river or a low -lying area, so the stone sand is mixed together, and the gold that has been washed out. Sand gold originated in the mine, because the gold ore was exposed to the ground. After a long wind and rain, the rocks collapsed in the north wind, and the gold was separated from the sand and the water. Deposition is a gold -containing layer to form sand gold. The characteristics of sand gold are: different sizes of particles, large as broad beans, small ones like fine sand, different shapes. The color is different due to the height of the formation. More than 90 % of them are red yellow, eight percent of them are pale yellow, and seven become cyan yellow. Matonous gold is the gold that has been smelted and purified by the gold. Generally, the purity is higher and the density is fine. Some can be directly used in industrial production. Common gold bars, blocks, ingots, and various accessories, utensils, gold coins, and industrial gold silk, pieces, boards, etc. Due to the different uses, the required color is different, or because the device is not purified, it is only melted without purity, or the purity of the mention is insufficient, forming a different golden height. People are accustomed to three types: pure gold, red gold, and color gold according to the height. According to the different gold content, it is divided into color gold, mixed gold, and K gold. The gold that reaches a fairly high purity after being purified is called pure gold, which generally refers to gold that reaches more than 99.6%. This and pure gold are close to thought, but due to the different time and local standards, the standards of Chijin are different. The gold sold in the international market reaches 99.6%of Chi Jin. The red gold in the territory is generally between 99.2%-99.6%. It color gold, also known as "secondary gold" and "tide gold", refers to the low color. Due to the different metal content of these gold, the high color is 99%high, and only 30%of the low. If is divided by different metals, gold can be divided into color gold, mixed gold, K gold, etc. The color gold refers to gold only mixed with silver components, regardless of whether it is high or low. There are more color gold, commonly in gold bars, ingots, blocks and various utensils and gold jewelry. The mixed gold refers to the in addition to the silver in the gold, but also contains other metals such as copper, zinc, lead, and iron. Depending on the type and quantity of the metal contained in, it can be divided into small mixed gold, large mixed gold, bronze mixed gold, and lead -containing large mixed gold. K gold refers to gold and copper according to a certain proportion, and the gold is prepared according to the formula of 24K. Generally speaking, the more the proportion of k gold is silver, the more colorful the color; the large copper ratio is purple. In the early days of liberation of China, my country's K gold was calculated at the standard of each K4.15%. After 1982, it had been unified with international standards, and per K to 4.1666%as the standard. The type of silver 925 Silver: refers to the silver containing 92.5%of the silver, which refers to 92.5%of the silver and 7.5%of other metals. Silver standards are recognized in international standards. 100%silver is soft, it cannot be formed during production, it is inconvenient to make silver jewelry, and it is easier to "oxidize". It is commonly known as "color change" and 925 silver adds other metals to increase its hardness. Not easily deformed. The finished product is better. Min silver: 925 silver -plated white -plated white -plated white crickets (called platinum in the industry), which can delay the characteristics of the maximum delay of yellowing and turning yellow and black under oxidation or vulcanization. 925 silver with no white gold plated in the industry is "Su Yin", and Su Yin is more likely to oxidize in the air. The 925 silver sold on the market now has a large proportion of products in order to reduce the cost, and it is all silver. Thai silver: Thai specialty, the standard is also 925 silver content. The appearance lacks light, pursuing a "ancient" "ancient silver" effect. Compared with the 925 silver -plated silver jewelry, because the popular foundation is not extensive enough, the price is the bottom. Tibetan silver: Generally does not contain the ingredients of silver, it is the elegant name of white copper (copper nickel alloys). Traditionally, Tibetan silver is 30%silver plus 70%of copper, but even such a traditional craft "Tibetan silver silver "Now that you can't see it in the market, most of them are replaced by completely white copper. Sold with false and false silver: Make only one layer of silver with other metals to deceive customers. When identifying the jewelry department, because the test is only part of the surface layer, it is easily identified as a thin layer of silver or 925 silver with a thin layer of 999 silver or 925 silver. It is recommended to cut the silver jewelry from the middle to the most reasonable method when the silver jewelry is inspected to detect the innermost part of the middle. Thekyal silver knowledge 1. The standard content of sterling silver is many and 92.5%. The surface of the sterling silver jewelry should be handled accordingly. 2. Silver jewelry can be cleaned with professional silver water washing water or silver cloth. Thai silver jewelry can be cleaned with toothpaste or silver cloth. Do not use silver washing water. . It is strictly forbidden to pull the silver jewelry, necklaces, bracelet chains, and inlaid jewelry. Due to the fine workmanship, you should be careful when you wear it. The method of identifying the silver jewelry (1) See the color (and again (again Called the face gear) Test: The higher the purity, the white the silver, the delicate and uniformity of the face gear, and the color is moisturized. If the lead is contained, the tide flowers are blue and gray; if the copper is contained, the surface gear appears rough and rotten, and there is a sense of dryness. Although the oxidized silver has "black rust" on the surface, its color is dark and bright, tin, and white copper without luster, and their color is twilight. (2) Type weight: Silver density is slightly larger than the general common metal. Generally speaking: "Aluminum is light, silver is not light and not light." Therefore, the weight can make a preliminary judgment on whether it is silver. If the jewelry has a large accumulation and light weight, it can be initially judged that the jewelry is other metals. (3) Check the hardness: The silver hardness is lower than the copper, and it is larger than the lead and tin. If it is a leading tin texture, the traces are obvious and prominent; if there are traces of the physical objects, but not obvious, it can be initially determined as silver jewelry. Pure silver jewelry can be pulled by hand, and it can deform it. (4) Listening rhyme: If the jewelry is high -colored silver, there is no rhyme, no elasticity, and the sound is "卟 卟 卟". The lower the color, the lower the sound, the higher the sound and the higher the rhyme; if it is copper, its sound is 100th, and the rhyme sounds are rushing and short. No elasticity. (5) See the stubble mouth fixed color: cut off the silver jewelry and see the color of the stubble mouth. Soft, slightly red, the color is around 95; the stubble mouth is white and gray, and slightly reddish is about 90; the bending of the hand is harder, the stubble mouth is light red or gray, and the color is about 80; the color is 70; The left and right silver, the surface is white and dry, the stubble mouth is red and yellow, and the bending is hard; (6) Forgery of silver: Forgery of silver is generally made of red copper, brass, white copper, lead, tin, aluminum, etc. It is characterized by: red copper: purple -red appearance, black and red, green embroidery. Bronze: yellow appearance, green stubble beans, green embroidery. White copper: The appearance is gray -white, the stubble bricks are gray, and green embroidery. Leading: Gray blue, soft, can be drawn with nails. Tin: silver -white, soft, can be used to draw a trace with nails. Aluminum: white gray, soft and lighter 925 sterling silver is international standard silver for international silver jewelry. It is different from 9.999 silver jewelry, because the purity of 9.999 silver jewelry is relatively high, and it is very soft and difficult to make complex and diverse accessories, while 925 sterling silver jewelry can do it. The 925 sterling silver jewelry is actually not 100%of the silver content, because the 7.5%alloy added to the sterling silver improves the gloss, brightness and hardness of the silver. Since Tiffini launched the first set of silver with silver jewelry of the first set of silver content in 1851, 925 sterling silver jewelry has become popular. standard. After polishing, the 925 silver jewelry shows a very beautiful metal luster, and it also has a certain hardness. It can inlaid gems and make mid -to -high -end jewelry. The 925 sterling silver jewelry designed with 925 silver has European and American style, rough, bold, avant -garde, and at the end of fashion. It also has exquisite, delicate, suitable for the public. The 925 sterling silver jewelry displayed to everyone are made of handmade, and then adopted advanced technology and design. ---- Stone inlaid ----- After polishing these processes, each piece of finished product condenses the designer's effort and sweat, which makes the product look very spiritual.
Gilling
The industrial use is more gold -plated, generally electroplating, and gold water. Most PCBAs or electronic chips are plated on the tin. There are also instructions. Generally, metal iron, copper, zinc, steel, tin can be plated.
platinum
In the classification of minerals, platinum elements are naturally platinum, including 铱, 铑, 钯 钯 钯Platinum 4 natural element minerals. They exist in the same phenomenon of the same phenomenon in each other, thereby forming a series of types of quality of the same elephant mixed crystals. At the same time, the ingredients often include iron, copper, nickel, silver and other elements. When their content is high, they constitute the corresponding species. Platinum elements are alternately shaft -crystal systems, and single crystals are very rare, and occasionally small grains of cube or octopus are produced. Generally, there are irregular granular, branches, grape -shaped or block shapes. The color and strip marks are silver -white to steel gray, metal luster, opaque, no rheology, jagged fracture, extensible, and is a good conductor of electricity and heat. Metals melted by platinum elements include gold, gold, platinum, gold, etc.
1. N Gold
mainly melted from nature. Color silver -white, similar to platinum, metal luster. Hardness is 4 ~ 4.5. Relative density 12. The melting point is 1555 ° C. Chemical properties are more stable. Because the output is larger than platinum and gold, the value is low, and it is rarely used to make jewelry.
. N Gold
is mainly refined by nature. It is a rare precious metal. The color is silver -white, metallic luster, opaque. Hard 4 ~ 4.5, relative density 12.5. The melting point is high at 1955 ° C. Chemical rewards are stable. Because the golden gold is resistant to corrosion and the gloss is good, it is mainly used for the electroplating industry. It plated it on the surface of other metals.
3. N Gold
is mainly refined by nature 铱 or ore. The color is silver -white, with strong metal luster, hardness 7. The relative density is 22.40, but it can be pressed into foil or filament at high temperature but it can be pressed into filaments at high temperature. The melting point is high, up to 2454 ° C. Chemical properties are very stable. It is mainly used for manufacturing scientific instruments, hot electric puppets, resistance, and so on. High -hardness and tadpole platinum alloy are often used to make nibs and platinum jewelry.
4.
platinum
The is picked by natural platinum and coarse platinum ore. Because "platinum" is combined by the word "gold" and "white", the color is silver -white, so it is also called "platinum". Silver white, metal luster, hardness 4 ~ 4.5, and relative density is 21.45. The melting point is high at 1773 ° C. Rich ductility, can be pulled into a fine platinum silk, rolled into extremely thin platinum foil. The chemical properties are extremely stable, insoluble in strong acid and strong indulgence, without oxidation in the air. It is widely used in jewelry industry and chemical industry, and is used to create high -grade chemical utensils, platinum pots, and catalysts that accelerate chemical reactions.
. Types of platinum
. Pure platinum
The highest color of platinum. Commonly used for making engagement rings to show the pure virginity of love. Many people think that inlaid diamonds with gold may cause diamond yellowing, which greatly reduces the price of diamonds. With platinum inlaid diamonds, the pure white color of diamonds can be kept, especially as an engagement ring. Platinum inlaid diamonds with platinum are both white and crystal. However, although platinum has higher hardness than gold, inlaid diamonds and jewelry are still insufficient. They often need to be mixed with * gold to make * platinum alloy inlaid diamonds.
. Platinum gold
alloys composed of 铱 and platinum. The color is also silver -white, with strong metal luster. High hardness. The relative density is also large and chemical, it is an excellent platinum alloy jewelry material. Depending on the content of hinge and platinum, it can generally be divided into three types:
10 % 铱-platinum alloy 21.54 1788 ℃
15 % 铱-platinum alloy 2159 1821
5 % 铱 铱 铱-Clatinomin 21.50 1779 ° C
. K white gold
The white alloy made of gold and other metals. Metals such as gold and nickel, silver, copper, zinc and other metals are selected into a white alloy, which is called "K platinum". The color of K platinum is the same as the K gold identification, such as 18K platinum and 14K platinum, of which the gold content is 75 % and 58.5 %.
. The identification of platinum and similar metals
platinum r r
silver white and strip marks, hardness of 4 ~ 4.5, relative density 21.45, stable chemical properties, insoluble in ordinary acids as their identification characteristics, and it is easy to identify with similar metals.
The silver and silver distinguishes with relative density, hardness, and stable chemical properties.
Although silver is silver -white, the relative density is 10.53, only 1/2 of platinum; and low hardness and no flexibility. Therefore, it can also be left with nails. Folding and difficult to recover; coupled with the unstable chemical properties of silver, the nitric acid will be dissolved and the nitric oxide gases will be released. Platinum is insoluble in nitric acid, and it can be dissolved quickly in the heated king water. At normal temperature, its dissolution speed is extremely slow. Generally, it is difficult to detect the naked eye.
platinum is a very good catalyst. Using this feature, you can quickly identify platinum
The commonly used hydrogen peroxide reaction method. The specific method is to take a little measuring powder. Among them, if the platinum is tied, the hydrogen peroxide rolls up immediately to break down a large amount of oxygen. The platinum after the response is still unmoved, and it can be recycled (it only accelerates the decomposition); Aluminum and other reactions have no such reaction.
pure gold
The theoretically 24K gold is 100 %pure gold, but generally reaches 99.99 %, it is called sufficient gold, 24K gold; The proportion of gold is 14/24. It is used to print 14K or 18K on the jewelry, indicating the ingredients of the gold.
Platinum is the largest and purest metal in the metal. Of course, it is also the most expensive. There is always a little loss every time gold or silver scratches or polished, while platinum does not. The golden and silver claws that control diamonds and other gems will wear it with continuous use, so they need more metals to strengthen, but platinum claws will not.
The platinum jewelry mostly contains 90-95%of pure platinum, and the rest consists of 铱 or 钯. Because platinum is strong and durable, platinum jewelry can be used for life. The text "PT number" refers to its metal purity or quantity of each platinum jewelry, and PT950 gold is a pure 100 % platinum.
gold, this metal will not lose luster, rust or corrosion. However, although it is strong, it also has a strong ductility. Pure gold is too soft and cannot withstand the tension of daily wearables. Gold jewelry has different pure metal percentage, and the measurement unit is opened. It can increase the strength and durability with other metals such as silver, copper, nickel and zinc. The text "K number" refers to its metal purity or quantity of each gold jewelry, and 24K gold is 100 % gold.
24K gold jewelry is too soft. Pure gold jewelry is generally 18K gold (75 %), and the usual gold jewelry is 14K (58.3 %). 12K (50 %) cannot be made of jewelry, and 10K (41.7 %) is the legal golden weight bottom line in the United States, otherwise it will not be regarded as real gold.
The color of gold jewelry is manifested in two aspects: the type of metal alloy and alloy percentage. Since 18K and 14K gold jewelry have high purity, their yellow is more saturated. Obviously, 18K gold jewelry has a relatively saturated yellow color, while 14K gold is the first choice for the behind the earrings and bracelet buttons because of its strong strength.
Golding gold: It is to use the electrolytic principle to plating a layer of golden film or platinum film on the surface of the metal substrate.
Gold is a natural product that exists in a free state in nature. According to the different sources and the different contents of the content, the content of raw gold and cooked gold.
This gold, also known as natural gold, waste gold, and original gold. It is the object of cooked gold. It is a gold that is unlimed from the mine or river base layer and has not been melted and refined. There are two types of gold and ore gold and sand gold.
Mine gold, also known as the alleged gold, produced in mines and gold mines. After mining, crushing, and washing, large gold can be picked directly, and the small grains can be dissolved in mercury. Mine gold is mostly accompanied by other metals. Among them, in addition to gold, there are other metals such as silver, platinum, and zinc. Before other metals were proposed, it was called a precursor. The other metal components produced in different mines are different. Therefore, the percentage is different, generally between 50%-90%.
The sand gold is produced at the bottom of the river or a low -lying area, so the stone sand is mixed together, and the gold that has been washed out. Sand gold originated in the mine, because the gold ore was exposed to the ground. After a long wind and rain, the rocks collapsed in the north wind, and the gold was separated from the sand and the water. Deposition is a gold -containing layer to form sand gold. The characteristics of sand gold are: different sizes of particles, large as broad beans, small ones like fine sand, different shapes. The color is different due to the height of the formation. More than 90 % of them are red yellow, eight percent of them are pale yellow, and seven become cyan yellow.
Matonous gold is the gold that has been smelted and purified by the gold. Generally, the purity is higher and the density is fine. Some can be directly used in industrial production. Common gold bars, blocks, ingots, and various accessories, utensils, gold coins, and industrial gold silk, pieces, boards, etc. Due to the different uses, the required color is different, or because the device is not purified, it is only melted without purity, or the purity of the mention is insufficient, forming a different golden height. People are accustomed to three types: pure gold, red gold, and color gold according to the height. According to the different gold content, it is divided into color gold, mixed gold, and K gold.
The gold that reaches a fairly high purity after being purified is called pure gold, which generally refers to gold that reaches more than 99.6%.
This and pure gold are close to thought, but due to the different time and local standards, the standards of Chijin are different. The gold sold in the international market reaches 99.6%of Chi Jin. The red gold in the territory is generally between 99.2%-99.6%.
It color gold, also known as "secondary gold" and "tide gold", refers to the low color. Due to the different metal content of these gold, the high color is 99%high, and only 30%of the low.
If is divided by different metals, gold can be divided into color gold, mixed gold, K gold, etc. The color gold refers to gold only mixed with silver components, regardless of whether it is high or low. There are more color gold, commonly in gold bars, ingots, blocks and various utensils and gold jewelry.
The mixed gold refers to the in addition to the silver in the gold, but also contains other metals such as copper, zinc, lead, and iron. Depending on the type and quantity of the metal contained in, it can be divided into small mixed gold, large mixed gold, bronze mixed gold, and lead -containing large mixed gold.
K gold refers to gold and copper according to a certain proportion, and the gold is prepared according to the formula of 24K. Generally speaking, the more the proportion of k gold is silver, the more colorful the color; the large copper ratio is purple. In the early days of liberation of China, my country's K gold was calculated at the standard of each K4.15%. After 1982, it had been unified with international standards, and per K to 4.1666%as the standard.
The type of silver
925 Silver: refers to the silver containing 92.5%of the silver, which refers to 92.5%of the silver and 7.5%of other metals. Silver standards are recognized in international standards. 100%silver is soft, it cannot be formed during production, it is inconvenient to make silver jewelry, and it is easier to "oxidize". It is commonly known as "color change" and 925 silver adds other metals to increase its hardness. Not easily deformed. The finished product is better.
Min silver: 925 silver -plated white -plated white -plated white crickets (called platinum in the industry), which can delay the characteristics of the maximum delay of yellowing and turning yellow and black under oxidation or vulcanization. 925 silver with no white gold plated in the industry is "Su Yin", and Su Yin is more likely to oxidize in the air. The 925 silver sold on the market now has a large proportion of products in order to reduce the cost, and it is all silver.
Thai silver: Thai specialty, the standard is also 925 silver content. The appearance lacks light, pursuing a "ancient" "ancient silver" effect. Compared with the 925 silver -plated silver jewelry, because the popular foundation is not extensive enough, the price is the bottom.
Tibetan silver: Generally does not contain the ingredients of silver, it is the elegant name of white copper (copper nickel alloys). Traditionally, Tibetan silver is 30%silver plus 70%of copper, but even such a traditional craft "Tibetan silver silver "Now that you can't see it in the market, most of them are replaced by completely white copper.
Sold with false and false silver: Make only one layer of silver with other metals to deceive customers. When identifying the jewelry department, because the test is only part of the surface layer, it is easily identified as a thin layer of silver or 925 silver with a thin layer of 999 silver or 925 silver. It is recommended to cut the silver jewelry from the middle to the most reasonable method when the silver jewelry is inspected to detect the innermost part of the middle.
Thekyal silver knowledge
1. The standard content of sterling silver is many and 92.5%. The surface of the sterling silver jewelry should be handled accordingly.
2. Silver jewelry can be cleaned with professional silver water washing water or silver cloth. Thai silver jewelry can be cleaned with toothpaste or silver cloth. Do not use silver washing water.
. It is strictly forbidden to pull the silver jewelry, necklaces, bracelet chains, and inlaid jewelry. Due to the fine workmanship, you should be careful when you wear it.
The method of identifying the silver jewelry
(1) See the color (and again (again Called the face gear) Test: The higher the purity, the white the silver, the delicate and uniformity of the face gear, and the color is moisturized. If the lead is contained, the tide flowers are blue and gray; if the copper is contained, the surface gear appears rough and rotten, and there is a sense of dryness. Although the oxidized silver has "black rust" on the surface, its color is dark and bright, tin, and white copper without luster, and their color is twilight. (2) Type weight: Silver density is slightly larger than the general common metal. Generally speaking: "Aluminum is light, silver is not light and not light." Therefore, the weight can make a preliminary judgment on whether it is silver. If the jewelry has a large accumulation and light weight, it can be initially judged that the jewelry is other metals. (3) Check the hardness: The silver hardness is lower than the copper, and it is larger than the lead and tin. If it is a leading tin texture, the traces are obvious and prominent; if there are traces of the physical objects, but not obvious, it can be initially determined as silver jewelry. Pure silver jewelry can be pulled by hand, and it can deform it. (4) Listening rhyme: If the jewelry is high -colored silver, there is no rhyme, no elasticity, and the sound is "卟 卟 卟". The lower the color, the lower the sound, the higher the sound and the higher the rhyme; if it is copper, its sound is 100th, and the rhyme sounds are rushing and short. No elasticity. (5) See the stubble mouth fixed color: cut off the silver jewelry and see the color of the stubble mouth. Soft, slightly red, the color is around 95; the stubble mouth is white and gray, and slightly reddish is about 90; the bending of the hand is harder, the stubble mouth is light red or gray, and the color is about 80; the color is 70; The left and right silver, the surface is white and dry, the stubble mouth is red and yellow, and the bending is hard; (6) Forgery of silver: Forgery of silver is generally made of red copper, brass, white copper, lead, tin, aluminum, etc. It is characterized by: red copper: purple -red appearance, black and red, green embroidery. Bronze: yellow appearance, green stubble beans, green embroidery. White copper: The appearance is gray -white, the stubble bricks are gray, and green embroidery. Leading: Gray blue, soft, can be drawn with nails. Tin: silver -white, soft, can be used to draw a trace with nails. Aluminum: white gray, soft and lighter 925 sterling silver is international standard silver for international silver jewelry. It is different from 9.999 silver jewelry, because the purity of 9.999 silver jewelry is relatively high, and it is very soft and difficult to make complex and diverse accessories, while 925 sterling silver jewelry can do it. The 925 sterling silver jewelry is actually not 100%of the silver content, because the 7.5%alloy added to the sterling silver improves the gloss, brightness and hardness of the silver. Since Tiffini launched the first set of silver with silver jewelry of the first set of silver content in 1851, 925 sterling silver jewelry has become popular. standard. After polishing, the 925 silver jewelry shows a very beautiful metal luster, and it also has a certain hardness. It can inlaid gems and make mid -to -high -end jewelry. The 925 sterling silver jewelry designed with 925 silver has European and American style, rough, bold, avant -garde, and at the end of fashion. It also has exquisite, delicate, suitable for the public. The 925 sterling silver jewelry displayed to everyone are made of handmade, and then adopted advanced technology and design. ---- Stone inlaid ----- After polishing these processes, each piece of finished product condenses the designer's effort and sweat, which makes the product look very spiritual.