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The ancient jade was buried in the ground for a long time. The color change caused by the pressure of ground pressure, temperature, humidity and various substances is called ochre. The yellow nickname is bandit, the white is leeches, the green is copper plaque, the purple is bloody, and the black is mercury. The antiques reach the real thing, often artificially imitated. As early as in the Northern Song Dynasty, it was already seen in the Northern Song Dynasty. As early as the Ming and Qing Dynasties, it appeared in the Northern Song Dynasty. As for the Ming and Qing Dynasties, the techniques of imitation were various and extremely difficult to identify - the color was whitened by barbecue, but Compared with the ancient jade, there are fine cracks on the surface.
A small piece of jade is implanted in the leg of the lamb. After several years, the surface is taken out to form a blood-colored filament like the ancient jade red silk, commonly known as "Yangyu", similar to "dog jade", but this jade is slightly dry.
The jade that is soft in texture is boiled with ebony, and then colored by the oiling method, commonly known as "meiyu", but it generally appears to be unnatural.
The jade and iron filings are mixed together and buried in the ground with hot vinegar. After several months, the surface is covered with iron filings to smear orange peel, mixed with soil spots and deep red rust, commonly known as “å©çŽ‰â€; The method is colored, the color penetrates into the jade muscle ash and does not retreat. This kind of ochre color is fresher when it is cloudy, and it is slightly turbid when it is fine.
Artificial imitation is the key technology of antique jade, which was applied in the Northern Song Dynasty along with the appearance of antique jade. In the Ming and Qing Dynasties, the methods of artificial imitation were perfect, and the forms were diverse and extremely difficult to identify. Some gold stone archaeologists in the Qing Dynasty have a lot of records on the ancient jade imitation. In Wang Xinyao's "Jade Ji Bu", the following methods of jade dyeing are described:
Through the barbecue jade, the color is whitened to fill the ancient chicken bone white jade. Compared with the real ancient jade, there are hot cracks on the surface.
A small piece of jade is implanted in the leg of the lamb. After a few years, the surface will be taken out to form a blood-colored filament like a red silk on the handed down, commonly known as "Yangyu". Compared with the true ancient jade, the "Yangyu" is slightly dry.
The jade is placed in the belly of a dog that has just been killed and the blood has not yet solidified. After a few years in the ground, the surface of the jade will produce soil and blood spots, commonly known as "dog jade." The jade surface often retains the color of the new jade.
The jade that is soft in texture is boiled with ebony, and then colored by the oil extraction method, commonly known as "Meiyu". This antique twilight generally appears to be unnatural.
Put the jade into the thick gray water and ebony water, and heat it in the snow to form a fine crack like a shredded wire to fill the cow hair in the ancient jade, commonly known as "wind jade".
In addition, some methods of soaking in frying, roasting, cigar water, and burying in pots, silt, and toilets can make the jade lose its true color, so I won't go into details here. In short, mastering the jade identification techniques, understanding the jade quality, the style of the times and the commonly used old methods only have the preconditions for the identification of jade.
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