Question 2: What color is silver? The dazzling color composed of gray and metallic light is silver, just as gold is composed of yellow and metallic light.
Adopt it
Question 3: Will silver rust? What color is that? Silver will not rust, but will only turn black after being oxidized by air.
Silver is a chemical element with chemical symbol Ag (from Latin Argentum) and atomic number 47. It is a silver-white transition metal. A small amount of silver exists in nature in the form of free elemental substance, mainly in ores containing silver compounds. Silver has stable chemical properties, low activity, high price, good thermal and electrical conductivity, is not easy to be corroded by chemicals, and is soft and malleable. Its reflectivity is extremely high, reaching over 99%.
chemical property
Silver is dissolved in nitric acid to produce silver nitrate. Silver nitrate is a transparent crystal, which is photosensitive and easily soluble in water. Silver nitrate is the raw material for synthesizing many other silver compounds, and it can also be used as a preservative and a yellow additive in colored glass. Silver is not easy to react with sulfuric acid, so sulfuric acid is used to clean the copper oxide fire mark left by silver welding annealing in jewelry manufacturing. Silver easily reacts with sulfur and hydrogen sulfide (H2S) to produce black silver sulfide (Ag2S), which is commonly found on tarnished silver coins or other articles. Silver can also react with oxygen at high temperature to produce brown silver oxide (Ag2O). When the silver electrical contact works in an environment rich in hydrogen sulfide, the silver sulfide on the contact will also generate silver whiskers.
Question 4: What color is the silver jewelry after oxidation? Silver jewelry will turn black after oxidation.
1. Why does silver turn black?
One of the important factors is that there is a great affinity between silver ions and sulfur ions, which is easy to produce chemical reactions. As a result of the reaction, silver sulfide is produced on the surface of silver. Because silver sulfide is grayish black, with the increase of silver sulfide, the surface color of silver gradually changes from white to yellow, then to gray, and finally to black. This chemical change can occur in a very small amount, as long as silver meets hydrogen sulfide gas or sulfur ions in the air in the range of trillions to hundreds of trillions, this chemical reaction will occur.
Human sweat also contains sulfur, and contact with silver products will make silver discolor, especially the hydrogen sulfide produced by sewage and garbage discharge in urban air is even more amazing, so it is not surprising that silver discolors.
Second, beautiful silver ornaments also need maintenance.
1. According to experienced people, when taking a bath in summer, the bath composition is different. In order to avoid conflict, silver ornaments should be removed as much as possible. However, necklaces, anklets, bracelets and so on. They are delicate and delicate, so be careful when hanging or holding them, so as to avoid frequent damage to the spring leaf or damaged interface due to too many hanging times.
2. When using skin care products and sanitary cleaning products, wear silver ornaments (except rings) after wiping and completely absorbing or drying. Otherwise, these products will react with silver ornaments, resulting in black, yellow and even falling off the surface of silver ornaments.
3. Try not to pull silver ornaments hard at ordinary times, because silver is a soft metal, which is easy to deform and break. Although the most common 925 silver is much stronger in hardness than 999 silver, it should also be taken care of and maintained by high-grade jewelry.
Third, how to maintain the silver ornaments?
1. Avoid putting it together with hair gel, perfume and skin care products, because it will weaken the luster and avoid contact with chemicals such as vinegar, bleach and correction fluid.
2. Don't wear other precious metal jewelry when wearing silver jewelry to avoid collision, deformation or wear. 925 silver is soft because of its high silver content. Please don't pull with force when hooking your hair or clothes.
3. Avoid contact with water vapor and chemicals, and don't swim in it, especially when going into the sea.
It is best not to wear it when sleeping. Silver ornaments should be removed when washing, bathing and doing rough work to prevent them from encountering alkaline products.
5. When exercising or doing manual labor, try to avoid wearing jewelry, otherwise it will easily cause jewelry deformation or damage.
6. 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.
7. Avoid putting multiple ornaments together, because they have different hardness, and should be stored separately in the frame after use, so as 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.
8. The best way to maintain silver jewelry is to wear it every day, because human body oil can make silver jewelry have a natural and moist luster.
9. Prevent discoloration and deterioration caused by long-term exposure to sulfur and its compounds. Silver ornaments contact with hot spring water or sulfide, which is easy to change the surface and should be avoided in hot spring areas.
10. Silver is light brown when it is oxidized. You can wipe it with a soft cloth dipped in a little silver oil, soak it in silver water, or directly wipe it with a silver cloth (silver cloth contains silver maintenance ingredients and cannot be washed with water, and the stains produced by wiping are silver, so it can be used many times).
1 1. When the silver ornaments are not in use, please seal them and keep them away from air.
In addition, because some silver ornaments are mixed with some amphibole and glitter, we should also pay attention to cleaning after each use. It is not enough to wash the glitter or amphibole with water only, because most of these products are made of waterproof and sweat-proof materials. Therefore, if you want to thoroughly clean up the traces left by flash powder and flash stone, you must choose the right method.
Question 5: What color is the real 925 silver? If it is milky white, is it real silver? Probably not. It should be pure white.
1 Look at the color, if it contains lead, the jewelry will appear blue-gray; If it contains copper, the surface of jewelry will be rough and the color will not be moist. Second, weigh the weight. The density of silver is slightly higher than that of common metals, aluminum is light, silver is heavy, and copper is not heavy. Therefore, it can be preliminarily judged whether it is silver by weighing. If the jewelry is large and light, it can be preliminarily judged that the jewelry belongs to other metals. Check the hardness again. The hardness of silver is lower than that of copper, but higher than that of lead and tin, so it can be tested by marking jewelry in an inconspicuous place with a pin. If the needle slips, it is difficult to leave traces on the surface, which can be judged as copper jewelry; If it is made of lead and tin, the trace is obvious; If the object has traces but is not obvious, it can be preliminarily judged as silver jewelry.
2 Listen to the rhyme. Sterling silver jewelry fell to the ground and was not elastic. The lower the color, the lower the sound, and the sharper and higher the rhyming sound; If it is made of copper, its sound is high and sharp, and its rhyme is short and short; If it is made of lead and tin, the sound of falling to the ground is dull, short and inelastic. In addition, the silver content of silver jewelry must be accurately marked, and consumers should check whether there is "s925" or "925" on the jewelry when buying. "S" is the first letter of the English word silver, and "925" is the symbol of pure silver. As long as there is "s925", you can ensure that you buy genuine sterling silver jewelry. Pay special attention to whether the fasteners are fastened and reliable when purchasing. When buying a silver chain, lay it flat and see if the links are kinked or bent. (925 here refers to 92.5% standard silver and 7.5% alloy, because the physical characteristics of pure silver are not suitable for jewelry, and it is basically not used for jewelry).
Question 6: What color is science fiction silver? It looks like gray, but it is brighter than gray.
Because the color of diamond silver is very close to that of flash silver, it is easy to be confused from the outside. Here are some ways to distinguish them:
( 1)
Seal identification: according to national standards, jewelry products should be marked with seals and their purity. If the jewelry has the words "PT" or "PLATNUM" or "PLAT", it is platinum; If the word "S" or "SILVER" is on the jewelry, it is silver.
(2) Weighing: the specific gravity of platinum is 2 1.4, and that of silver is 10.49. Platinum with the same volume weighs twice as much as silver, so it can be distinguished by weighing it by hand.
(3)
Appearance and hardness contrast: Platinum is slightly grayish white with naked eyes, and its texture is hard, so it is difficult to carve scars with needles. Its Mohs hardness is 4.3, while silver is white, and its texture is smooth and delicate, and it will turn grayish white or black when slightly oxidized. Its Mohs hardness is 2.7, which is much softer than platinum.
(4)
Combustion method: Platinum can resist high-temperature oxidation, and its melting point is as high as 1770oC, and it will not melt when burned with ordinary high-temperature (gasoline). After cooling, its color will remain unchanged or there will be quenching marks. On the other hand, the melting point of silver is very low. After high temperature combustion, its color is red, black or black depending on the silver content.
(5) Chemical method: Platinum is extremely stable in chemical properties and corrosion-resistant, and will not reflect when it meets any acid or alkali, while silver is not resistant to strong acid corrosion.
Platinum is gray and hard; Silver white, fine and smooth texture.
Question 7: What color does silver gray match? Silver gray belongs to colorless system in color, and colorless system is universal color, which can match all colors. The key depends on what effect you want. You want to show off, use gold, red, green and orange, use purple for elegance, use white, beige and blue for elegance, and use silver, gray and black for business ~ ~ ~
Question 8: What color is silver rust? Silver can be divided into foot silver and tattoo silver:
Foot silver: foot silver with a silver content of not less than 990%. Because it is too soft, it is not easy to cast into the desired jewelry shape, and it is easy to wear and oxidize and blacken. So it is not suitable for jewelry.
Serpentine: Serpentine with a silver content of not less than 925 is called serpentine. Granular silver, also known as "925 silver", is usually made up of 92.5% silver and 7.5% copper. Due to the addition of copper, polished products are brighter and more beautiful than silver, so they are often used as jewelry materials and silverware. 925 silver jewelry in order to increase the gloss and reduce the degree of oxidation, some manufacturers will also plate a layer of platinum on it. Such products are commonly known as real money and silver products in the industry.
925 silver seed
Platinum-plated 925 sterling silver
Silver is an unstable metal that will turn yellow and black due to external factors. There is no way to stop it from changing in the world at present. Plating platinum (palladium and rhodium) on 925 silver can effectively isolate 925 silver from the outside air. This platinum effect can generally last for 4- 12 months according to the degree of protection of jewelry, and then it will become the effect of silver itself.
Question 9: What colors are gold and silver? Fleshy?
A reddish color in light yellow, similar to skin color;
Flesh color represents stability, although it is a common color;
But it has an extraordinary temperament. Flesh color makes us feel warm and happy;
The color closest to human beings. It is also a woman's confident color; The yearning in a man's heart.