Jade appreciation should be seen six
A look at the material is the primary premise of jade collection. High-quality jade material is essential for a jade, such as jade, jade, luster, density, splitting, smudging, etc. These are the elements of jade grade and should not be ignored.
The second shape modeling is the aesthetic framework of jade, and it is also an important factor in determining the value of jade collection. The shape is determined by the function and the shape of the jade, and the proportional trade-offs should be appropriate. Well-proportioned and not dull, balanced and stable is the beauty of the work.
The three embossed ornaments are the decoration of jade, and its beauty and ugliness are easy for people to perceive and feel. Generally speaking, it is subject to the needs of the device type, or both of them depend on the needs of social functions. The decoration depends on the structure, the rules, the complexity, the sparseness, etc., and the structural rules are methodical, and the unity and harmony have the appreciation value.
The four-process jade process is a technical condition from the material changer. Its nature is relatively stable and it is not easy to be recognized by people. It is a difficult problem in appreciation. Wherever the work is smooth and fluent, the skilled workmanship must be beautiful or relatively beautiful. On the contrary, the plate is sluggish and the water is muddy, which is a sign that the value of the collection is sharply reduced.
The five art art is the highest realm that every jade is pursuing and the hardest to do. Everything with vivid charm and both form and spirit is the expression of artistic beauty, reflecting the rich collection value. On the contrary, the figure is shaped and the ancients are all works that violate the artistic beauty. The appreciation value is much less.
Six views of innovation and antique jade contain two major art forms: innovation and antiques. From the perspective of artistic innovation, there are new jade articles that are worthy of collection. However, the jade collections affected by the modern trend of thought should be treated with care, so as not to fall into the misunderstanding of "only new"; however, the antique jade can not be fully collected, depending on the specific In the case of the situation.
High Precision Optical Glass Window
Windows are optical glass with ground and polished faces that are relatively parallel.They are used to isolate two physical environments while allowing light to pass.Windows made of BK7 material have high transmission in the visible spectral region, do not scratch easily, do not degrade under normal operating environment and hence do not need any special precaution or treatment. Anti-Reflective Coating will provide higher transmission.
China Star Optics offers all types of windows made from different materials. Such as N-BK7, Fused silica, sapphire,CaF2, Silicon, Borofloat, high borosilicate glass and other optical glass supplied by Schott and Chinese CDGM are available upon request.
Windows at shape of round,quadrate, triangular or other polygonal are also available upon request.In addition, we provide a variety of single layer or multiplayer anti-reflecting coating,HR,PR coatings on Optical Windows.
Specification of our optical windows as follow:
*Material:high borosilicate glass, BK7,UV-grade fused silica (JGS1) or other optical crystals materials
*Length tolerance:+/-0.01
*Width tolerance:+/-0.01
*Center thickness tolerance:0.005mm
*Surface quality:80-50 to 10-5 Scratch/Dig
*Surface flatness:<lambda to lambda/20
*Parallelism<=1min -- 2sec
*Clear Apenture:80% -- 100%
High Precision Optical Glass Window,High Purity Silica Windows,Optical Round Window,Standard Optical Windows
China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com