AG color in button industry
First, silver, the element symbol: Ag; Color: silvery white metal; Mohs hardness: 2.5; Density: 10.53 g/cm3; Melting point: 961.93 °C; Good flexibility and ductility, ductility is second only to gold, Can be pressed into thin slices and pulled into filaments. It is the best metal for electrical conductivity and thermal conductivity. Want to learn more about buttons: accessible Chiffon Fabric,Crinkle Chiffon,White Chiffon,Printed Chiffon Fabric Shanghai Rising Silk Co., Ltd. , https://www.rising-silk.com
Chemical properties do not react with oxygen in water and air even at heating at room temperature. However, when the air contains hydrogen sulfide, the silver surface loses its silver-white luster. This is because silver and air H2S synthesize black Ag2S.
The difference between 925 Silver Silver and Silver Silver and Tibetan Silver Silver 925 Silver: refers to silver containing 92.5% silver, which is recognized as a standard of sterling silver in international standards. 100% silver is soft, can't be shaped when it is made, it is inconvenient to be made of silverware, and it is easy to "oxidize", commonly known as "color change"
Su Yin: In the industry, 925 silver, which is not plated with platinum, is called "primary silver". Sulphur is relatively easily oxidized in the air. A large proportion of the 925 silver products currently on the market are all silver in order to reduce the cost.
Thai Silver: Thailand's specialty, the standard is 925 silver content. The appearance lacks brightness and pursues an "old" and "old" "old silver" effect. Compared to 925 silver-plated silver ornaments, because the mass base is not wide enough, speaking of 925 silver, the price is lower.
Tibetan silver: Generally silver-free ingredients are the nicknames of white copper (copper-nickel alloys). Traditional Tibetan silver is 30% silver plus 70% copper, but even this traditional Tibetan “silver†is now market. It has not been seen yet, and it is mostly replaced by completely white copper.
All kinds of counterfeit real fake silver: made of other metals, only a layer of silver plating to deceive customers. In the jewellery department's appraisal, because only part of the surface layer was inspected, it was very easy to be identified as 999 full-silver or 925-silver silver because it was coated with a thin layer of 999 silver or 925 silver.
2. Platinum Platinum is named after the Spanish “Platina del Pinto,†which translates to silver-like white metals in the Pinto River. The common name is platinum.
Pure platinum is silvery white; it has a metallic luster and lasts forever. Hardness is 4 to 4.5 degrees. The relative density is 21.45 and the specific gravity is 15-19 or 21.4. Strong ductility, can be drawn into very thin platinum wire, rolled into a very thin platinum foil; strength and toughness, are also much higher than other precious metals. The melting point up to 1773.5 °C. Thermal conductivity is good. Chemically stable, insoluble in strong acids and alkalis, not oxidized in the air. Platinum does not absorb silver and has a unique catalytic effect.
Third, platinum K gold, its main component is gold, it is not natural white, due to the addition of other metals and appear white. White gold is not platinum (white gold). White gold jewelry usually uses 18K or 750 to indicate the purity of the gold it contains.
The difference between platinum and platinum. Strictly speaking, K Platinum cannot be equated with platinum. Platinum is a precious metal that itself is naturally white. Commercial platinum jewelry has the “PT†logo, which is the acronym for platinum. K Platinum is a white alloy that is smelted from gold and other metals. The so-called 18K white gold is actually synthesized from 75% gold and 25% other metals. Therefore, K Platinum cannot be marked with the “PT†mark, but can only be marked with the purity and purity of its gold. For example: 18K Platinum can only be marked with "18K", "G750", etc. So, how can you easily distinguish between the two? First of all, buying these expensive jewelry must be more reliable in large shopping malls. The most important thing is to see the label and see whether the jewelry is marked with "K" or "PT".
The difference between silver and platinum is that silver has a low specific gravity, a small hardness, and reacts with sulfur to change color and become black.
Fourth, diamonds, the mineral name is diamond, is recognized as the king of precious stones. The chemical composition is 99.98% carbon. A diamond is actually a very dense carbon crystal. The Mohs hardness of a diamond: 10 is the highest hardness in natural minerals.
Easy identification of diamonds 1. Hardness testing Diamonds are the hardest naturally occurring substances known. Nothing can be traced on diamonds. If you mark the traces, it is by no means a diamond.
2. Thermal conductivity test At the same time, the diamonds to be defended and other similar items shall be breathed together. If the diamonds, the water condense on the surface should evaporate faster than the water mist on other items. This is because of the high thermal conductivity of diamonds. .
3. Observing the reflected light With a magnifying glass, it can be observed that the diamond has a fine matte shape with shiny crystals at the waist. This feature of diamonds is unique.
4. Look at the growing point under a magnifying glass. The crystal surface of authentic diamonds often have grooves and triangle growth points. There are three types of fake products: 1) Common glass with alumina added. Because of the increase in refractive index and dispersion, it is easy to stray into. But the hardness is low. 2 Chemically synthesized sapphire and colorless spinel imitation, hardness is close, but the refractive index is low and birefringence phenomenon, visible under the magnifying glass ghost.
5, the same chemical composition test pencil to detect the authenticity of diamonds, is a more practical and effective method, in the identification time, we must first wet the diamond with water, and then gently pencil with a pencil, in the real diamond crystal On the surface, the area where the pencil is stroked is traceless, and if it is not a diamond but a material such as glass or crystal, it will leave marks on the surface. Under normal circumstances, the accuracy of this method is high. 6: Artificial zirconia imitation, high hardness, good refraction, but will reflect more of the color when turning, compared with the original only reflected in the rotation of the weak yellow, blue color light, there are significant differences.
The above are the characteristics and differences of sterling silver, diamonds, platinum and platinum. Each has its own characteristics and uses. It cannot be said that it is the best and the worst. If the value is of course the highest in diamonds, followed by platinum, platinum, and sterling silver.