Due to the different hardness of jade material and jade skin, when the sickle of antique jade passes, the jagged skin is deeper in the jade skin. The place where the knife is passed has the phenomenon of jade discontinuity and the new luster of honing; When the old jade new work uses a magnifying glass to examine its color, its twilight is due to the carving of the new work, and there is a discontinuous phenomenon, which is easy to distinguish. The part of the window that is left behind by the forgery is extremely unnatural, and it is slightly experienced. It is not difficult to distinguish it. Because it is a fake, the false scorpion floats on the surface and cannot be deeply penetrated into the jade.
What is the "leather" of ancient jade?
The unique "leather shell" of ancient jade, that is, the surface of the jade that is similar to the "oxidation film" formed by the contact with the air for a long time, is not flat, and is ablated, depending on the warm and radiant Baoguang, while the new jade is artificially polished. Relationship, the gloss is brighter, but mostly floating.
What is mercury?
The black color in the ancient jade color, commonly known as "black lacquer ancient", has been eroded by mercury for a long time. Therefore, it is also called "mercury æ²", but it is not completely correct. The ancient jade is black. Two factors: First, the original jade, that is, black jade (or jade jade) and symbiotic white jade, is considered to be twilight. Second, some silver and copper and jade composited enamel and ancient jade, the part that touches the metal, often makes the jade form a black enamel, among which, especially the silver and jade jigs are seen, the black formed It is also deeper (but there are also those who do not know), so the black enamel in the ancient jade should be formed by the contact of jade with organic metals, not limited to mercury.
What is cinnabar?
Observed from the color and qualitative changes, a large amount of oxidized mercury in cinnabar has more qualitative changes to jade than ochre. Jade and cinnabar have been wrapped for a long time. After being unearthed, some cinnabars are attached to the table. However, the sand smears in the granules are all white. It can be seen that the ancient jade articles are combined with cinnabar for a long time, which can cause white metamorphism in jade. Because jade has been in contact with cinnabar for a long time, some of the watches have changed in white, but some high reliefs will make some parts of the watch not in close contact with cinnabar, and retain the original jade material, which is what the ancient jade experts often call " Open the window."
What is patina?
After the jade is exposed to copper, it is cyan, the iron is in contact with water, and it is easy to rust. In the process of rusting, the volume of rust iron will expand, causing the jade to produce black enamel from inside to outside. If rust is removed, copper, The ochre appearance of iron and ancient jade that has been in the earth for a long time is quite similar.
What is chicken bone white?
Some of the jade articles are white in chicken bones. In addition to the fire and burial of jade, the general tomb contains a large amount of strong alkali (lime), and may also smear the jade, showing such a phase. Since ancient times, China has used the custom of using lime to collect the tomb, which is also the reason why the chicken bones are more white in the jade unearthed in China.
What is old red?
Some of the jade articles are brownish red. These types of soils are generally considered to be entangled by nearby iron elements, such as irons for burial objects, causing the surface of the jade to be brownish red, rather than cinnabar (according to experience, cinnabar Only contaminate the watch, but can't break in, just clean it.) In addition, if it is dyed, it can only be dyed on the surface, not in the jade, and it will be discolored after a little play.
What is a nail?
After the jade is placed in the soil, most of the surface area is in the shape of a dot or small block. The color is golden yellow, which is like nailing the gold spot on the jade table, and the depth of the depression is different. In the past dynasties, there were also imitation nails, which made the jade watch a spot-like spot and dyed the yellow plaque, which was extremely unnatural. Nowadays, the imitations use diamonds to drill small spots on the table, which is also extremely uniform. Such imitations should be distinguished by a little attention.
What is Tang rust?
After the jade was placed in the soil, some of the surface was severely eroded, causing the jade table to have a large area of ​​depression, and the part of the pupil plaque was the Tang plaque. Such eclipses, because of the excessive severity of the cockroaches, often cause the jade to be too damaging and lose its integrity, thus reducing its collection value.
Striped Printed Fabric,Pajama And Skirt Fabrics,Rayon Crepe Skirt,Rayon Crepe Printed Fabric
Shaoxing RongMai Trading Co., Ltd , https://www.rm-fabric.com