For the identification of the authenticity of ivory art, we need to pay attention to the following aspects :
First, observe the color and broken crack of the ivory itself. The epidermis of ivory-carved art will age. Over time, the surface begins to yellow, and then gradually turns from yellowish yellow to dark yellow to light brown. And, on the same ivory, the colors are often different. Along with the change of color, some of the surface of the object will also have a short hair with a short hair, which we call "the freckle". The longer the year of the tooth, the more, the darker, the deeper and longer the bird, and the more cracks it will appear. The old ivory utensils are made of false objects. The skin is colored but not light, and there is no patina. The cracks of the freckles are also unnatural. They smell and have a smell of smoke.
Second, judge from the artistic style of sculptures. For example, the Guanyin image carved in the early Qing Dynasty has a simple line of clothing and a legacy of the Ming Dynasty. Because of the combination of the shallow and shallow knives, the round and straight and straight, the lines of the clothes drooping and calm, giving a calm feeling. The modern imitation of the Guanyin image, the lines of clothing are complicated, the three-dimensional sense is not strong, and the knife method is weak.
Third, pay attention to the old materials and new carvings. The so-called "old material new carving" is the use of the old tooth device, modified into "ancient famous product", or the old tooth device is damaged, take a part of it to change the face, used to serve as an ancient tooth carving. In this regard, we can identify from two aspects of materials and processes.
Fourth, the analysis of the characteristics. Regarding the analysis of the characteristics of the money, in addition to paying attention to the "post-addition" method of counterfeiting, you should also be wary of counterfeiting the truth, especially for the famous sculptures of the famous family. For example, Yu Shuo, a micro-carver at the end of the Qing Dynasty and the early Republic of China, his book is not only fresh and beautiful, but also coherent, like a one-shot. At present, Yu Shuo's works also have counterfeit, micro-engraving of counterfeit goods, the font shape is skewed, the knife is straight, and the strokes are the same in thickness, which is very different from the original.
Common falsification methods of ivory carvings In the market, we often see some deliberately made ivory carvings. The material itself is ivory, but new ivory, in order to pretend to be old ivory, the ivory through various means to make new ivory teeth The color becomes old yellow, in order to gain the advantage of counterfeiting antiques.
Commonly used pseudo-methods are as follows:
1. Immerse the new ivory in concentrated tea water or soak it in coffee juice for several weeks or months. Second, the ivory products are soaked in turpentine and exposed to sunlight for three or four days. Third, the new ivory is placed in the oven and freezer to be baked and frozen alternately, so that the thermal expansion and contraction are excessive and cracks appear, posing as natural cracks of the ancient ivory. 4. Smoke in the smoke, so that the color of the new ivory is similar to that of the old ivory. After smoking, some volatile tar-like substances adhere evenly to the surface of new ivory.
However, in this way, the color can be wiped off by a cloth dampened with an organic solvent such as gasoline or alcohol. After the false color is wiped off, the original natural color of the new ivory is maintained. Sometimes, using fake techniques as a fake color, it can also be washed away with warm water and soapy water. During the Republic of China, it was popular to dye with dyes to achieve the purpose of dilapidation. The dyed ivory has the same overall color, but the ivory color that naturally ages with the age is the darkest of the most exposed parts.
Therefore, in the identification of tooth color, we can look at the bottom or inside of a piece of tooth, to see if the degree of change in color aging is consistent with the surface. Old-fashioned ivory by artificial dyeing, generally can not make the color of the table and the depth of the interior in the process of treatment, but the natural old ivory has this difference, which is to identify the ivory is natural. Yellowing is still done manually and provides a logo.
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