There are four main methods of jade dyeing and counterfeiting. Different methods have different identification focuses!

Jade dyeing is a well-known method of jade counterfeiting, but the methods of dyeing are also varied. Different methods have different identification focuses, and it is not easy to detect at a casual glance. You may not know all of these common dyeing methods on the market~

1

Polishing powder dyeing

Everyone should be familiar with the polishing powder dyeing method. For jade processing, polishing is originally a normal process. As a result, unscrupulous merchants found that if dyes are added to polishing powder, they can use this process to dye jade and increase the value of jade.

If this kind of dye comes into contact with human skin for a long time, it will slowly penetrate into the skin, which is very harmful to the body, not to mention health.

【Identification】

① Observation with the naked eye: Generally speaking, as long as the jade is dyed and polished, the residual traces can be observed directly with the naked eye under a strong (cold) light source.

② Use a cotton swab dipped in water or a wet tissue to gently wipe the surface of the jade. If fading occurs, it will expose the fake dyeing.

2

Dyeing agent

Dyeing with dyes is actually what we often call C-grade jade. The process of this dyeing is relatively advanced. First of all, there is a skill in selecting jade. Try to choose white jade with coarse crystals, dry texture, dark impurities, and average quality. After soaking in strong acid to remove impurities, it can still have a certain degree of transparency. At this time, dye it with dye, and finally vacuum and inject glue.

This article is originally produced by Daily Jewelry Class

【Identification】

① Use a magnifying glass to observe the surface acid etching pattern. The net-like pattern is the one that has been acid-etched and decolorized.

② Observe the color of the jadeite. The color is uniform, diffuse, dull, without color roots, and the transition boundary between the color area and other colors is not obvious. It is dyed;

③The glossiness is not strong, the transparency is turbid and foggy, and even the whole surface appears white.

3

Direct surface painting

This is a relatively basic dyeing technique, which is to apply color directly on the surface of the jade, allowing the dye to adhere to the cracks on the surface of the jade and the gaps between mineral particles, thereby dyeing it with color. This type of dyed jade mainly appears in some jade rough semi-finished products and bracelet products.

【Identification】

Because the dyeing is only on the surface, the internal structure of the jade is still intact, so although the technique is simple, it is very effective. The essence of the jade appears unchanged, but it is smoother and brighter, and is therefore easily overlooked.

① Observe that the color distribution is uniform, there is no color root, and the color boundary is not obvious, which is a transitional state;

②This kind of simple dyed color is usually distributed in the form of silk screen or dots. When observed with a magnifying glass, you can see the dye attached to the pits.

4

Deep color dyeing

The principle of color dyeing is a bit complicated. The jade products to be processed are first heated and then quickly immersed in liquid dye.

Because jade expands when heated and contracts when cooled, many tiny cracks appear on its surface. The dye takes advantage of the cracks to penetrate into the jade, dyeing it with color.

【Identification】

① Magnify and observe the surface of the jadeite. This kind of jadeite generally does not have a strong luster, and because of heating and soaking in dyes, the surface of the jadeite has become uneven and looks very rough.

② Under magnified observation, you can also see that the dye is enriched in the network of cracks.

③ Because the structure of jade is destroyed and cracks are caused by the color explosion, the jade makes a dull sound when it is knocked.