Black with gold ornaments, personality and publicity
Traditional impression: tacky, publicity
Subversion temperament: elegant, aristocratic gas
Black high collar + gold stitching + elegant makeup
Gold and black with the classic can be considered one of the mix, but in this season, the gold is no longer alone, it is with the red jasper, horse hair, leather rope and even the fish and other pieces of gold jewelry, A little fun, but did not reduce the gold aristocratic temperament.
Most Match crowd: Everyone
Aristocratic gas with tips:
1. skin color yellow to avoid the golden earrings
When the gold and other materials stitching, part of the yellow luster has been Cartier nail bracelet replica weakened, if the color is still yellow you still do not worry, then avoid the golden earrings it, as far as possible set off the gold on top of the black clothing.
2. With gold jewelry with the fabric to pay attention to
Black high-necked shirt as much as possible to cashmere, silk or worsted spinning and the like, to avoid the big sticks and other thick lines of sweaters, or both cover up the gold jewelry, and no FA highlights the aristocratic temperament.
Silver blue dotted on top of the gold, fashion sense of the YU out, a little complicated design can be a simple black sweater to bring out a little sense of alternative.
TIPS gold jewelry maintenance should pay attention
1. Finally, wearing gold jewelry: cosmetics, hair gel and other chemical substances will make the surface of the loss of luster, so try to wear after stopping to wear gold jewelry.
2. Gold to be included separately: Do not wear gold or other metal together or placed, so as not to be invaded by other metals, the surface of the spots.
3. Do not wear gold when swimming: avoid wearing gold jewelry when swimming, because the sea water and swimming pool water, when mixed sweat, it will become an aggressive chemical substances, will oxidize and damage the gold.
First, platinum (pt) some of the physical and chemical properties
Platinum is a member of the Platinum Group element, chemically inert (only soluble in aqua regia), refractory (melting point 1773 οc) than the major (21.45 g / cm 3) and the high catalytic activity is the main feature of platinum. In nature, platinum is produced in the form of metal platinum, and platinum is often associated with rhodium, pliers, palladium, iridium and ruthenium. Platinum is often combined with iron, nickel, copper, gold, silver, lead, tin and other metals into a metal. This requires the processing of platinum jewelry, to keep the production tools clean, to prevent the metal should not be mixed into platinum, so as not to affect the purity of platinum and jewelry quality.
Second, part of the national production (region) platinum (pt purity standard)
At present, the market popular platinum jewelry can be divided into two categories: First, pure platinum jewelry; Second, platinum alloy jewelry. Due to the geographical and jewelry culture differences, countries (regions) to develop the market purity standards are not the same. Japan, Hong Kong: Allows platinum purity of 1000, 950, 900 and 850, and allows an error of 0.5%. In the United States: platinum content of more than 95% of the jewelry, allowing to play “pt” mark. Platinum content of 75% -95% between the jewelry, must be marked with platinum group metal mark, such as iridium (ir-id-pat), said containing 10% of the alloy. Platinum content of 50% -75% between the jewelry, must be marked with the name and content of platinum group metals. Europe: In 1972, the “Precious Metals Control and Labeling Agreement” states require a single purity of pt950. But Portugal and Italy are allowed to have minor errors. While Belgium, France, Greece, Spain, the Netherlands and other countries to allow iridium when the amount of platinum imitation Cartier love bracelet calculation. However, Germany allows other standards of purity.
China prepared in 1989, the precious metal jewelry purity naming method (gb1187-89) provides: 950 platinum – platinum content of the micrometer of not less than 950, said 950 platinum, hit pt950 mark; platinum – platinum content of less than 990 Called platinum, hit platinum mark or print according to the actual content. Pure platinum has a good processing performance, can be processed into the required sheet and pull into the required wire. As pure platinum is too soft, can not firmly fit the gem. In order to improve the hardness of platinum and suitable for casting and manual processing requirements, many countries of the jewelry materials company in pure platinum, the amount of platinum addition to the addition of platinum elements and other metals, you can get the ideal jewelry production materials.
Third, platinum casting
Platinum jewelry casting, generally engaged in years of gold jewelry casting but the lack of platinum jewelry examination industry casting staff also have “talk about platinum color change” feeling. The main reason: First, the melting point of platinum high (pure platinum to 1773οc) than pure gold (1064οc) more than 700 degrees; Second, platinum melting temperature is high, heating a long time. Platinum casting the key issue is the temperature, making platinum jewelry alloy melting point is also high. Platinum alloy melting not only requires a very high temperature, but also to keep the platinum liquid for casting the temperature range is very narrow. At present, platinum casting melting mainly used torch mode and induction heating method. Torch melting has some difficult to overcome the shortcomings, such as difficult to grasp the exact melting temperature. The induction heating is mostly equipped with temperature measurement control device. This melting method can be more accurate melting temperature and time, but also the use of sealed casting method. As far as possible to avoid the destruction of foreign impurities, which can get high-quality platinum castings. Casting platinum must pay attention to keep clean, high temperature platinum easily mixed with foreign substances, this will cause casting quality problems. Platinum alloy smelting, no additional flux. Platinum casting mold and 18k gold jewelry is basically the same, but the lower the strength of platinum, mold operation can not force the file mill is too large, leaving a large filing marks difficult to make up, it is possible to scrap the entire casting.
Fourth, the manual processing of platinum jewelry
The use of jewelry mold casting platinum alloy jewelry blanks, must be cut through the mouth, plastic surgery, repair defects, file cutting, sanding and other molding process to become the perfect mosaic bracket. Platinum jewelry is often set inlaid diamonds, rubles, sapphire and other high-quality precious stones, is a high-grade jewelry, so the appearance of the overall coordination of the bracket, the surface of the smooth, finish and other processing requirements more sophisticated. Almost all of the metal alloy produced by the first material in the cold processing of rolling, drawing and stamping process, will produce a certain degree of hardening, hardening is the form of stress within the metal material, the common rolling sheet when the surface of the distortion , Broken, pull the wire when the coil, crack and so on. Elimination of platinum alloy workpiece hardening method is annealing. The annealing of the platinum alloy can be carried out using a general torch flame.
To successfully perform platinum alloy annealing requires careful control of the heating time and temperature. Most of the platinum alloy at 600 ο c began to stress relief, at 1000οc will quickly soften. It is sufficient to heat the workpiece with a thickness of 2 mm for about one minute depending on the thickness of the workpiece during the heating time. Thickness of more than 2 mm of the workpiece should be proportional to the length of heating time. Platinum alloy in the annealing Fake Cartier love bracelet process will not change color and pollution. So platinum can be heat treated without forming a table and the risk of fading the film. Platinum alloy jewelry parts of the production, organization of links, ring changes and defect repair, mainly through the welding to complete. Welding is the most difficult part of platinum jewelry processing. Because the melting of most platinum alloy materials is carried out at a temperature of 1500 οc or higher.
In the platinum jewelry hand processing process, we must pay attention to the following aspects:
① must prevent the surface of the workpiece foreign body (other metal debris pollution);
② annealing or welding, can not use contaminated support frame, welding with a fire-resistant support and can not use charcoal.
③ protect the eyes, high temperature welding of white radiation and ultraviolet radiation is much higher than the affordability of the naked eye, prolonged by radiation will cause “arc burning eye”, may cause permanent damage to the retina. It is necessary to use the welding filter with the filter is relatively safe. Platinum alloy has a strong antioxidant, jewelry carefully after a high degree of polishing, in a static state, will never lose its dazzling luster. If after a high degree of polishing, and then plating a layer of white metal rhodium, can enhance the surface hardness. Rhodium high reflectivity, brightness lasting, so that platinum alloy jewelry more dazzling.
Five, platinum often identify methods:
1, view color method: pure platinum is white, shiny bright, white k gold color for the white partial yellow beige, silver color is white. From the surface color can be distinguished.
2, hand palm method: platinum density of 21.45, through the same volume of material weight test, platinum has a heavy feeling, it is heavier than gold (19.36), than the weight of white gold, but also than silver (10.45).
3, melting method: platinum melting point reached 1773oc, much higher than k white gold and silver. General torch can not melt platinum, which can identify the authenticity. And platinum after cooling the same color.
4, marking method: platinum jewelry has a standard stamp. Internationally with pt or pt words, such as pt950 platinum fineness of 950%.
5, natural gas method: the jewelry placed in the open gas stove on the mouth, put a few minutes if the jewelry turns red warming gas stove lit, compared to platinum products. This is because platinum can be used as a catalyst to promote the gas and oxygen in the air exothermic, so that platinum heating, red so that can ignite the gas.
6, point test: a mercury wiped on platinum, platinum will not be contaminated, and gold, silver and mercury will be combined with pollution. B in the edge of the platinum jewelry or the middle of the file with a file to put some powder into the hydrogen peroxide bottle, platinum can act as a catalyst to promote hydrogen peroxide decomposition, release oxygen and up and down somersault