The knowledge about the authenticity of jade can be found in various books and on the Internet. There are various methods, such as drawing glass, using a magnifying glass, a color filter, or tapping the sound. Are these methods correct? Let's take a look at some of the unreliable jade identification methods.
There may be some fans in the circle. They always know how to behave. They talk about some terms. They always hold a color filter. No matter what jade is seen, he uses a color filter to look at it and tell others that this pair Or this is not right. In fact, this is a plausible method of identification. Why? Because he did not understand the principle of color filter identification, jadeite dyed with organic dyes showed red color under the color filter; jadeite stained with inorganic pigments, B jadeite or many D-filled jade goods, under the color filter Does not change color.
It has also been said that with the emerald glass, it is true that the print can be made, and the one that cannot be drawn is fake. This is a cognition that does not understand what jade has a pseudo-method. See if you can use the glass to counterfeit the jade, and use the jadeite, jade and other serpentine jade counterfeit jade products, because these jade have a low Mohs hardness and can't scratch the glass. However, it is impossible to identify the C-car jade that is itself jadeite, but the color of C is jade, and it is jadeite, which is soaked with strong acid and glued.
There is also a commonly heard method: put the hair on the jade, and burn it as the standard of judgment. It doesn't matter where this method comes from, it must be judged by the principle of different thermal conductivity, but it is unreasonable, and it cannot be used as an effective method to identify jade. Because of the difference in thermal conductivity, it is far from distinguishing between true jade and other counterfeits.
These methods, which were once very popular, are now less common. Nowadays, the more popular scene is in the jade shop. Whether it is a business or a guest, when looking at the jade bracelet, I love to use two jade bracelets to knock each other and listen to the sound to judge the authenticity. Some tourist spots can also see businesses as a means of marketing. The merchant holds the jade bracelet in one hand, and sometimes uses a small rope to hang it, and the other hand uses another bracelet or agate column to knock, meaning to tell the guest that my jade is true. To identify by the sound of tapping, it is only effective for B-car jade. If it is only the dyed C-car jade, the sound of the knock is the same as the A-car jade. Therefore, tapping can not be used as the final method to identify jadeite. Moreover, when you purchase high-grade jade bracelets, the merchants are more likely to use the method of tapping to identify them, because doing so will harm the jadeite, and will also reveal a message to the merchant: Rarely buy high-end goods, these will be bad for you to buy goods. Â
Superabrasives are tools used in precision grinding,precision cutting,precision polishing and precision drilling,like Flexible Diamond Abrasive.Superabrasive materials attach to a wheel,blade and drill to make Superabrasive Grinding Wheels,cutting balde and drilling bit.The reason some abrasives are Superabrasives is due to their extraordinary hardness,unparalleled performance,and longevity.
What are Superabrasives?
Abrasives that belong to the Superabrasive family includes,Industrial diamonds: an industrial diamond is a non-gem quality small diamond that is for abrasives,cutting,and drilling tools.
Cubic boron nitride (CBN): Usually called CBN it is the second hardest cutting tool material after a diamond.
Polycrystalline: Is an abrasive material that has a multiple collection of crystal grain structures with individual orientations
CVD Diamond: These are synthetic diamonds made by a process known as chemical vapor deposition.CVD diamonds grow from a hydrocarbon gas mixture. They are extremely hard,have a high thermal conductivity that is five times that of copper. They also have broadband optical transparency,are chemically inert,and only reach graphitization at very high temperatures.
Nanodiamonds: These tiny diamonds are the product of a controlled explosion. Sometimes called a detonation nanodiamond (DND) or an ultradispersed diamond,as this is how they form.
Industries That Use Superabrasives
A great number of industries use Superabrasive grinding wheels and the coated abrasives subsection of the abrasives industry continues to grow. Industries that are prime buyers of Superabrasive grinding wheels are,
|Aluminum Mills||Leather Tanneries|
|Boat Building||Medical Instruments|
|Brick & Tile||Metal Fabrication|
|Ceramic Products||Motor Vehicle Parts|
|Construction||Oil Field Equipment|
|Contract Machining||Paper Mills|
|Cutting Tools||Railroad Equipment|
|Forest Products||Saw Blades|
|Glass Products||Steel Mills|
Advantages of Superabrasives
The advantages of Superabrasive grinding wheels are more than extraordinary hardness,unparalleled performance,and longevity. These three features of Superabrasives are the core of many advantages manufacturers gain by an aggregation of services that normal abrasives simply cannot deliver.
Less expensive tooling and fixturing costs
More wheels on the spindle,smaller wheels,multiple operations
Less floor space needed for manufacturing
Virtual elimination of wheel wear
Automated CNC machines,less labor intensive operations requiring less training
Consistent surface speed from part to part
Better overall throughput with fewer machines needed
Improved Material Removal Rates,Lower Per Part Abrasive Costs and higher speeds
With Superabrasives,production increased by automated CNC equipment,industries have found one way to compensate for the lack of availability of skilled labor. With fewer machines needed,so is fewer workers. With Superabrasives CNC,automation is more concerned with defining a manufacturing process using machine capabilities and mechanization. There is less concern on operator technique. A properly defined process,combined with automatic loaders make for equipment that is almost running itself.
Future growth of the abrasives industries will primarily be in Superabrasives. Currently,research and development of Superabrasives are taking place in the following areas.
Custom designed [hard to grind" materials in an increasing number of industries
Creep or deep feed grinding
High-speed,high-performance grinding of hardened steel
Form grinding,sometimes with electroplating,in high precision,high-removal,and high-surface quality applications
CNC-control of line grinding machines
Other abrasive technology developments with Superabrasives are likely to occur in using CVD for the best bonding of coatings to diamond wheels
Superabrasives Precision Cutting,Superabrasives Precsion Polishing,Superabrasive Grinding Wheels,Profiled Superabrasive Grinding Wheels,Flexible Diamond Abrasive
Hans Superabrasive Material Co., Ltd. , http://www.hansuperabrasive.com