Chapter 859

After listening to the cause and effect of the incident, we all feel that it's tricky. Otherwise, if this bottle is genuine, even if the booth is located in a remote place, there are so many people in the ghost market, and it's coming to the end of the ghost market at that time, can't no one see it?

Therefore, Yuan Hongjian and Du Yile both felt that this jade pot spring vase should have a big flaw, so it was only left until Zhuang Shengjing found it. What's more, what's less than 20000 yuan in total is just to cheat Zhuang Shengjing? How much hatred would it take to set up a special Bureau for Zhuang Shengjing?

Of course, even if there is something wrong with this jade pot spring vase, we can't judge it without any reason. Therefore, we look at Chu Chen who has been identified and want to hear his answer.

Chuchen said with a smile: "this jade pot spring bottle is really excellent in terms of performance. But I don't know whether the maker has added to the cake or how. He actually made flint red at the bottom of the bottle. It's really a bit of nondescript, leaving a fatal flaw."

Hearing this, Zhuang Shengjing had a different opinion and said: "Mr. Chu, if I remember correctly, there is flint red because there is flint red in the fetal soil. If the fetal soil is refined, then there is very little flint red phenomenon, such as refined small utensils in the fetal soil of the Qing Dynasty. But in the Xianfeng Dynasty, the firing technique of porcelain was weak, and the scouring of the earth was not as good as that of the Qing Dynasty. Is it normal to have flint red

"You're right Chu Chen nodded.

Generally speaking, excellent porcelain stones and clay minerals are often highly weathered and contain a small amount of iron. Ancient craftsmen used the old-fashioned method of removing iron to dilute the porcelain clay, filter it with a net, and put a few pieces of original magnets in front of the net, which could not absorb a small amount of iron.

The ceramic body made of this kind of porcelain clay should be dried for a long time after glazing, so that the moisture in the body and glaze juice can be evaporated. Next, add dry cake, dregs, saggers, and go into a dry kiln to make white jade like porcelain, which will not produce flint red on its astringent body. This is the real reason that most ancient porcelain has no flint red phenomenon.

On the contrary, when the glaze is not completely dry, at a certain high temperature in the kiln, the iron molecules in the body will produce physical and chemical reactions under certain conditions, so the iron molecules become iron oxide and firmly adhere to the body. This is the flint red phenomenon.

"Mr. Zhuang, what you said is really possible, but this is under the condition that flint red is formed naturally, but like your jade pot spring bottle..."

Speaking of this, Chu Chen hung up the bottom of the bottle: "flint red looks unnatural, but there are also black spots. If you look carefully, you can see that these black spots are actually iron slag."

"Iron slag?" Hearing Chu Chen say so, they were all quite surprised. They rushed forward to have a closer look and found that it was really iron slag, especially with the help of magnifying glass.

As a matter of fact, Chu Chen had heard about the method of making flint red for a long time. At that time, Wu told Chu Chen that when he went to the porcelain capital in the 1980s, he saw someone using iron slag from the Ironmaking Factory to stick it on the bottom foot. He asked the man why he did it, and the man told him that he was making flint red.

However, although there is flint red after firing porcelain in this way, the black iron slag also sticks to the feet, which is a relatively low-level technique and can only deceive some beginners.

Zhuang Shengjing said with a bitter smile: "it seems that my eyesight is too poor. I can't even see such a flaw! However, since this jade pot spring vase is so lifelike, why does the maker want to paint the lily and add to the lily? "

Chu Chen and others can't understand this problem. It can't be said that the producers don't care about this kind of high-quality imitation. Can we use it to test the production method of flint red?

Everyone looked at each other and couldn't figure out why.

Yuan Hongjian is more open-minded, and he never drills any horns. When he comes back to himself, he says, "forget it, if you can't figure it out, don't think about it, but the teacher should pay attention to it. I think this person is still very problematic."

Zhuang Shengjing nodded. If it had not been for teacher Ren's reaction and action, he would not have been so deceived. However, even if he knows that Mr. Ren has a problem, he can't go to the other party to settle the accounts. If he doesn't say that he jumped into the pit himself, Mr. Ren can also say that he doesn't know much about porcelain, because he is proficient in jade.

"No!" All of a sudden, Du Yile's face changed and exclaimed. Then he stood up and ran into the inner room in a hurry.

The three were startled by Du Yile's sudden action. After a moment, Yuan Hongjian was surprised and said: "the old man didn't buy anything from that teacher or from his advice, did he?"

Chu Chen and Zhuang Shengjing think about it and think it's really possible. Of course, even so, they don't necessarily buy fakes. The key is to see what duyile has bought and what his eyesight is. However, since Mr. Ren is suspected of cheating on Zhuang Shengjing, it's right to check what he bought.

After a while, as Yuan Hongjian said, Du Yidong came out of the inner room with something in his arms.Seeing this situation, Yuan Hongjian asked: "I said Laodu, you have been in the business for so many years, and your level is not low. How can you ask others to buy things?"

Du Yile replied: "you are not nonsense. I study porcelain. I just dabble in jade. There are many difficulties in jade collection. Even if I like something, I have to ask someone else!"

We all think that there are a lot of fake jade in the market, and there are a lot of counterfeiting techniques. Not to mention those who are new to jade collection, even some experts are also hard to distinguish between the true and the false.

And if you want to learn jade identification, you need a lot of background knowledge. The shape, decoration and use of jade in each historical period are different. Collectors should not only memorize the characteristics of a large number of jade, but also understand the historical knowledge and archaeological data of each period, identify jade materials, and understand the characteristics of jade making technology in different times.

This alone stopped many collectors who wanted to learn jade identification.

Therefore, the identification of jade is not a day's work, it needs long-term experience. It's not enough just to read the catalogue of jades. We must first look at ancient jades, visit more museum collections, and communicate with experts. Only by persevering can we gain.

"Mr. Chu, I'd like to ask you to help me identify..."

Duyile opened a larger box with three pieces of jade in it. They were a jade bear from the Han Dynasty, a jade Bi from the Ming Dynasty and a jade pendant from the Qing Dynasty.

Chu Chen quickly said that there was no problem, then picked up the jade and observed it carefully.

Although the materials used in these three jades are a little poor, they are all from generation to generation, and each of them has its own advantages, which can be regarded as the best. However, because the three jades are not big, and the materials are not excellent, and the value is not high, they all add up to about 100000.

"Dulao, Congratulations, these are genuine products!" Chuchen nodded to duyile with a smile.

Duyile breathed a sigh of relief when he heard the words. He had let his friends see these pieces of jade before, but now he got Chu Chen's affirmation. There must be no problem.

"Please look at this jade sword of Han Dynasty..."

Then, duyile opened another box, in which was his jade sword.

The sword is white jade, but it looks dirty on the whole, as if it hasn't been unearthed for a long time. The jade sword has no grain on its body, high relief on its case, and dragon on its head. It's made in one go. Judging from the sculptors, it's really the style of the Han Dynasty.

However, as soon as the jade sword was started, Chu Chen immediately felt that the color of the jade sword seemed too white, which was not what white jade should have. After careful observation, he found that the body of the jade sword was not jade at all.

"How's it going?" Du Yi was glad to see that Chu Chen had finished reading it, so he asked in a hurry.

Chu Chen shook his head: "this thing is not true!"

"Sure enough!"

Du Yile sighed a long time and looked a little gloomy for a moment. However, he also went through a lot of storms in the end. In addition, he had some preparation for such a result in his heart, and immediately adjusted his mood.

However, he bought the jade sword with real gold and silver. He had to find out what happened. So he looked at Chu Chen and wanted to hear what Chu Chen said.

Chu Chen said straightforwardly: "the body of this jade sword is not jade, but nitrate."

"Nitrate?" Among the three, except duyile, who had heard something about it, others had never heard of it before.

Yuan Hongjian asked: "teacher Chu, what is this nitrate?"

Chu Chen explained: "nitrate is actually a kind of fake crystal made from ore, which has been imitated into jade for hundreds of years. Cao Zhao's gegu Yaolun in the Ming Dynasty introduced that" the people who use fake crystal to make medicine are dark green, with aura, or yellow green, or white, white and bright, which is called nitrate. "

"In addition, the ancients also said that" jade must be higher than nitrate ", which means that white jade must be as advanced as nitrate. It can be seen that nitrate and jade are very difficult to distinguish."

Yuan Hongjian asked, "how can we distinguish the two?"

Chu Chen replied: "no matter how hard it is to distinguish true from false, it is different after all. In terms of color, the white of white jade is often green, pure white is rare, and nitrate is pure white. As far as the nature of jade is concerned, jade is warm and delicate, like fat and cream. Although nitrate is also warm and moist, it is hard to avoid stealing light in its Yingrun. "

"The most important thing is that white jade is a natural product, and it is difficult to have a uniform physique. There are jade tendons and flowers in it. If nitrate is made artificially, there is no such phenomenon. The white jade has a solid texture and no bubbles to find. No matter how well the nitrate is processed, there are often bubbles and air holes exposed. You can look at these places with a magnifying glass... "