After listening to the cause and effect of the incident, everyone felt that this thing was boring, otherwise if this bottle was genuine, even if the location of the stall was more remote, but there were so many people in the ghost market, and it was almost the end of the ghost market, it was impossible for no one to see it, right?

Therefore, Yuan Hongjian and Du Yile both felt that this jade pot spring bottle should have a relatively large flaw, so they finally left it until the moment when Zhuang Shengjing found it. Besides, there are less than 20,000 yuan in total, is it just to deceive Zhuang Shengjing? How big a grudge will be to set up a bureau for Zhuang Shengjing?

Of course, even if there is any problem with this jade pot spring bottle, it cannot be judged without grounds, so everyone looked at Chu Chen, who had already been identified, and wanted to hear his answer.

Chu Chen smiled and said: "This jade pot spring bottle, judging from the table, is indeed very good, but I don't know if the maker painted the snake or how, he actually made flint red at the bottom of the bottle, which is really a bit nondescript, and it also left a fatal flaw." ”

Hearing this, Zhuang Shengjing had a different opinion and said: "Teacher Chu, if I remember correctly, there is flint red because there is flint red in the fetal soil. However, the porcelain firing technology of the Xianfeng Dynasty is weak, and the refining of the fetal soil is not as good as that of the Qing Dynasty, so it is normal to have flint red, right? ”

"You're right!" Chu Chen nodded.

Generally speaking, fine porcelain stone and clay ores, often with a high weathering range, contain trace amounts of iron, ancient craftsmen, using the old-fashioned iron removal method, diluted the porcelain clay, and filtered it with a net. Placing a few primitive magnets in front of the net will not absorb the trace amount of iron.

The porcelain blank made of this kind of porcelain clay has to go through a long period of drying after the glaze is applied. Let the water in the body of the blank and in the glaze evaporate cleanly. Next, it is accompanied by dry mat cakes, slag and sagger, and put into a dry kiln. In order to produce porcelain as white as jade, there will be no flint red phenomenon on its astringent tire. This is the real reason why most of the ancient porcelain astringent tires do not have flint red.

On the contrary, when the glaze is not dry, the iron molecules in the blank tire will have a physical and chemical reaction under specific conditions at a specific high temperature in the kiln, so the iron molecules become iron oxide and are firmly attached to the astringent tire. This is the flint red phenomenon.

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

Speaking of which. Chu Chen hung up the bottom of the bottle: "The flint red doesn't look natural, not to mention, and there are dots of black substance, if you look closely, you will know that these black spots are actually iron slag." ”

"Iron slag?!" Hearing Chu Chen say this, the three of them were quite surprised, and hurriedly stepped forward to take a closer look, and found that it was really iron slag, especially with the help of a magnifying glass, it was even more clear at a glance.

In fact. Chu Chen had already heard Uncle Wu say about this method of making flint red, when Uncle Wu told Chu Chen that when he went to the porcelain capital in the eighties. He asked the man why he did this, and the man told him that he was making zuò flint red.

But. In this way, although the porcelain is also flint red after firing, the black iron slag also sticks to the feet. It is a relatively low-level method, and it can only deceive some beginners.

Zhuang Shengjing smiled bitterly: "It seems that my eyesight is too poor." I didn't even see such a flaw! However, since this jade pot spring vase is so realistic, why does the maker have to draw snakes to add to it? ”

For this question, Chu Chen and others are a little puzzled, and they can't say that the makers don't care about such high-quality imitations, and use it to test the method of making flint red, right?

Everyone looked at each other, and couldn't think of a reason for a while.

Yuan Hongjian is more open-minded, and he never drills any horns, and when he came back to his senses, he said: "Forget it, don't think about it if you can't figure it out, but you still have to pay attention to what kind of teacher Ren is, I think this person is still very problematic." ”

Zhuang Shengjing nodded, if it weren't for Teacher Ren's reaction and actions at that time, he would not have been fooled like this. However, even if he knew that Mr. Ren had a problem, he couldn't go to the other party to settle the account, not to mention that he jumped into the pit himself, Mr. Ren could completely say that he didn't know much about porcelain and read it wrong, because he was proficient in jade.

"Oops!" Suddenly, Du Yile's face changed, he exclaimed, then stood up and hurriedly ran into the back room.

The three of them were taken aback by Du Yile's sudden movements, and after a while, Yuan Hongjian's heart moved, and he said in surprise:

"You can't buy anything from that teacher Ren or listen to his advice, right?"

Chu Chen and Zhuang Shengjing thought about it and felt that it was really possible, of course, even so, they might not necessarily buy a fake, the key was to see what Du Yile bought and how his eyesight was. However, since Teacher Ren is suspected of setting up a trap for Zhuang Shengjing, it is also appropriate to check what he bought.

After a while, as Yuan Hongjian said, Du Yidong walked out of the back room with something in his arms.

Seeing this situation, Yuan Hongjian asked: "I said Lao Du, you have been in the industry for so many years, and your level is not low, how can you buy things and ask others?" ”

Du Yile replied: "You're not talking nonsense, I'm studying porcelain, and I'm only slightly involved in jade, and there are many difficulties in collecting this jade, even if you see something, you have to ask others!" ”

For this remark, everyone deeply agrees, there are many fake jade products on the market, and counterfeiting techniques are endless, not to mention people who are new to jade collection, even some experts, are also difficult to distinguish the authenticity.

And if you want to learn jade identification, you need a lot of background knowledge. The shape, ornamentation and use of jade in each historical period are different, and collectors should not only memorize the characteristics of a large number of jade objects, 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 eras.

This alone has stopped many collectors who want to learn about jade identification.

Therefore, the identification of jade is not a one-day task, and it requires long-term accumulation of experience. It's not enough to just flip through the jade catalogue, you must get started with ancient jade, visit more museum collections, communicate more with experts, and persevere, you will have a harvest.

"Teacher Chu, I want to trouble you to help identify ......"

As he spoke, Du Yile opened a larger box, and there were three pieces of jade inside, namely a green jade bear from the Han Dynasty, a jade bi from the Ming Dynasty, and a jade pendant from the Qing Dynasty.

Chu Chen hurriedly said that there was no problem, and then picked up the jade and took a closer look.

These three pieces of jade, although the material used is a little worse, but all of them are not to be said, and they also have their own advantages, and they are also considered small and superlative, but because the three pieces of jade are not big, and the material is not excellent, the value is not high, and the total is only a hundred thousand.

"Old, congratulations, these are genuine!" Chu Chen smiled and nodded to Du Yile.

Du Yile secretly breathed a sigh of relief when he heard this, he had also seen these pieces of jade to his friends before, and now that he was affirmed by Chu Chen, there must be no more problems.

"Please also help me take a look at this Han Dynasty jade sword......"

Then, Du Yile opened another box, and inside was the jade sword he had spoken.

This sword is white jade, but the overall look is relatively dirty, as if it has not been unearthed for a long time. The sword body of the jade sword is plain and undecorated, the sword lattice is high-relief and the sword head is embossed with dragon patterns, and the workmanship is done in one go, from the perspective of carving, it is indeed the style of the Han Dynasty.

But as soon as the jade sword was in his hands, Chu Chen immediately felt that the color of this jade sword seemed to be too white, and it really didn't look like the white jade should have, and then looked closely, and found that the sword body of this jade sword was not jade at all.

"How?" Du Yile saw that Chu Chen had finished reading it, so he hurriedly asked.

Chu Chen shook his head: "This thing is not real!" ”

"Sure enough!"

Du Yile let out a long sigh, his expression a little gloomy for a moment. However, he has also gone through a lot of ups and downs, and he has some preparation for such a result in his heart, so he immediately adjusted his feelings.

However, after all, this jade sword was bought by him with real money, so he had to figure it out, so he looked at Chu Chen again, wanting to hear what Chu Chen had to say.

Chu Chen said bluntly: "The sword body of this jade sword is actually not jade, but glass. ”

"Glass?" Among the three, except for Du Yile, who had heard of this thing, the others had never even heard of it before.

Yuan Hongjian hurriedly asked, "Teacher Chu, what is this glass?" ”

Chu Chen explained: "Glass is actually a kind of fake crystal made of ore firing, which has been imitated into jade for hundreds of years. ’”

"Moreover, the ancients also said, 'Jade Sai Nitrate, must be high', which means that white jade must be like a glass to be considered high-grade, so it can be seen that it is difficult to distinguish between glass and jade."

Yuan Hongjian asked again: "Then how can the two be distinguished?" ”

Chu Chen replied: "No matter how difficult it is to distinguish, the truth and the false are different after all. In terms of color, white jade is often bluish in white, and there are very few pure whites, while glass is pure white with uniform whiteness. As far as jade is concerned, jade is warm and delicate, like fat and paste, although the glass is also warm, it is inevitable that there will be thief light in the moist. ”

"The most important thing is that white jade is a natural product, and it is difficult to have a uniform physique. If the glass is artificially made, there is no such appearance. The white jade texture is firm and there are no bubbles to be found. No matter how well the glass is processed, there are often bubbles and air holes exposed. At this point, you can use a magnifying glass to look at these places......" (to be continued......