Pitfalls and counterfeiting of ancient jade ②: Comparative evidence of ancient jade from Banshengkeng and fakes

The pits and counterfeiting of ancient jade ②: Comparative evidence of ancient Banshengkeng jade and fakes. The so-called Banshengkeng ancient jade refers to ancient jade that has lost its main characteristics after being cleaned and worn and played for a short period of time after being unearthed. Ancient jade. It is relatively difficult to identify the authenticity of this kind of half-shengkeng jade.
Evidence 1: After some raw-pitted glass polished ancient jade is unearthed, after cleaning and short-term polishing, it will form a semi-raw-pitted state, and will cause natural damage to the edges and corners of the craftsmanship and some special parts. Fake glass jade ware rarely has natural damage, and even if it does, it is damage caused by artificial forgery, and the structure of the damaged part is very different from the original ancient jade.
Evidence 2: After cleaning the ancient glass-light jade from Banshengkeng, some of it will cause the glass light to lose its brightness. This loss of brightness is mainly manifested in certain specific parts of the jade. The counterfeit half-shengkeng glass-gloss ancient jade generally has no attenuation or loss of brightness in these parts, and there are no traces of adhering substances that have been removed. The overall craftsmanship effect of the jade is completely the traces of modern processing and grinding.
Evidence 3: After the Banshengkeng ancient jade has been cleaned, there are still certain sedimentary substances that cannot be cleaned in some dead corners of the craftsmanship and in parts that have been severely exposed to moisture. These difficult-to-remove substances can only gradually disappear during the wearing process. . Counterfeiters sometimes add various attachments or artificial dyes to the forged Banshengkeng jades in these places. Such deposited substances and pigments can be easily removed with simple cleaning.
Evidence 4: After the Banshengkeng ancient jade has been cleaned, its main parts will be cleaner. Some collectors continue to use the traditional high-temperature boiling method for so-called ash extraction. In fact, this boiling treatment method, in addition to sterilizing and removing surface dirt, is good for high-hardness and high-density jade materials. Ancient jade has no effect. Any fake that has been chemically corroded or dyed will either produce a pungent odor or produce a certain amount of alkaline substances on the surface of the jade if it is boiled at high temperatures.
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