Platinum-platinum, platinum-platinum
The abbreviation of the former is WG (which obviously means platinum), and the abbreviation of the latter is PT.
Platinum is the type of K platinum (18K platinum or 14K platinum), which is obviously gold.
18K gold, containing 75% gold.
14K gold, containing 58.5% gold.
K gold must be mixed with other metals to reach the content of 100%. Mixing is not only to reduce the cost, but also to increase its hardness. In the process of mixing, its color will inevitably change because of mixing.
Yellow-18K gold, containing 75% gold, and the other 25% metals are silver and copper.
Rose red-18K gold with a gold content of 75%. Another 25% of the metal is copper.
It is white-18K gold, containing 75% gold, and the other 25% metals are silver, zinc and nickel.
It is green-18K gold, 75% gold, and the other 25% metal is silver, cadmium and copper.
Some 18K platinum turns yellow, not only because the platinum content is not enough, but because platinum is actually a synthetic rare metal processed from gold.
Platinum corner. Hardness is as stable as gold, but it also needs synthesis and mixing. In general, ruthenium, rhodium, palladium and other metals must be added to increase its hardness before it can be used to make jewelry.
The international symbol of platinum jewelry is the words Pt, Plat or Platinum, which is expressed by a few thousandths of purity. For example, Pt900 indicates a purity of 900‰. Commonly used platinum jewelry signs are Pt 1000, Pt950, Pt900 and Pt850.
Pure platinum generally needs to synthesize rare metals to resist hardness, so the color is generally not as changeable as WG's. Among them, PT950 is the most suitable for setting diamonds and related gems, because 5% palladium is added to increase the hardness. There was that kind of PT750 in the early days, but now it is gone.
Platinum jewelry is PTXX type, and platinum is generally 18K. , is very different in nature.
In fact, these two kinds of inlay materials have their own advantages. Obviously, the wear resistance of K platinum is much higher than that of platinum alloy.
At present, the processing and electroplating technology is quite advanced, and it is difficult to tell the truth from the appearance alone. It is best for the seller to provide the jewelry appraisal certificate provided by the national authority, which can be queried online. It is also important to identify the logo on the jewelry.
If you want to know more about this knowledge, you can go to the jewelry online, which has this knowledge, as well as the identification and purchase knowledge of diamonds, jadeites, pearls and other jewelry, as well as related pictures.
1. Identification of ring materials. There are two kinds of rings: single material and multiple material. The former is made of platinum, gold or silver and the latter is made of platinum or gold. In addition, the ring is also divided into whether it is inlaid with gems or not. Different types should be correctly identified when purchasing.
2. Appearance quality inspection. It is required that the ring coating should be uniform, harmonious in color, dense, fine, bright, free of shell, scar and sand spots. Appearance inspection, but also to see whether there is a manufacturer's code and the composition of the gold or silver seal.
3. Process quality inspection. The welding of the ring should be smooth and the lap should be thick; The pattern should be clear without overlapping; Lines on both sides should be neat and straight, without canine teeth, and the pattern combination should be coordinated; All parts of the ring should be smooth and burr-free. Nanjing yushang therapeutic massage center
4. Shape check. The ring requires beautiful appearance and novel style. For symmetrical rings, both sides of the ring are required to be symmetrical and uniform, with the same height and thickness. If it is a square ring, the torus should be flat, angular and square. For a ring inlaid with precious stones, it is required that the position of the precious stones should be stable, and the precious stones and brackets should be close, and the smaller the gap, the better. The teeth of brackets should be smooth and straight. All kinds of rings require the teeth to be centered, and the thumbwheel must be round.