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Text Chapter 574: Treasure Appraisal Activities (11)

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    The value of Mr. Niu's two pieces of Xuande blue and white porcelain should be around tens of millions. If he bought these two important pieces for five million, it would definitely be worth the money. But the original owner couldn't be that stupid, and something worth tens of millions would just be worth it.  Of course, it was possible that the original owner did not know the specific value of the item, so he took advantage of Mr. Niu.  "However, Xuande blue and white porcelain is quite famous. Wouldn't the original owner have it appraised before mortgaging it?"  Or is he based on the price a few years ago?  If these two items are genuine, there is no need to doubt anything. But if these two items have such problems, then you have to think more about them.  "Xiao Chu, what do you think?" Guan Guokang turned to Chu Chen next to him.  "I think these two things are not true!" Chu Chen said.  "Teacher Chu, since you think these two things are not true, there must be a reason!" Mr. Niu stared at Chu Chen closely and said, this is not tens of thousands or hundreds of thousands, but tens of millions.  , even if he has a net worth of several hundred million, losing tens of millions will still hurt him for a while, so he has to ask clearly no matter what.  In fact, when he just came over, Chu Chen had already used his supernatural power to identify the two pieces of porcelain. There was not even a little bit of psychic energy in the two pieces of porcelain. Therefore, these two things must be modern fakes.  However, the results given by the superpower cannot be used as a reference, so while everyone was talking, he carefully observed the two artifacts, and fortunately learned the authenticity of the artifacts in advance.  Otherwise, it¡¯s really not that easy to discover the several differences from the original.  "The reason why I say this must be well-founded." Chu Chen first picked up the big plate and said: "Let's talk about this blue and white plate first. It is a real Xuande official kiln porcelain. You can see the bubbles in the shaft with a magnifying glass.  There are different bubble groups of large, medium and small, and the gaps between the groups are relatively sparse. However, the bubbles in the glaze of this large plate are dense and neat, which is not consistent with the characteristics of the real thing. " Hear this.  Wang Xiangong said: "Well, Xiao Chu, I looked with a magnifying glass just now, why didn't I see the phenomenon you mentioned?" Others also nodded, indicating the same.  Chu Chen smiled slightly and said: "The reason is very simple. The magnifying glass you use here can only magnify it up to twenty times. And this phenomenon requires a magnifying glass thirty times to see it. If you don't believe it, you can use my magnifying glass to see it.  You'll know it right away." As he said that, he put his 30x magnifying glass on the table.  After hearing Chu Chen¡¯s explanation, everyone was surprised and quickly took turns to use Chu Chen¡¯s magnifying glass to observe the plate, and found that the bubbles in the glaze were indeed what Chu Chen said.  At this time, Mr. Niu felt very uncomfortable. Judging from the current result, he only had a blue and white plate.  It was indeed possible that it was a fake, but he felt unwilling to do so, so he said with some lack of confidence: "Is this an isolated phenomenon?" After all, it is a valuable item worth millions, and Mr. Niu behaved like this  , Chu Chen was not surprised, he walked to his position.  After saying hello to the treasure holder, he took a small blue and white bowl and said: "Mr. Niu, I'm sorry, this phenomenon is common in Xuande blue and white. If you don't believe it, you can take a look at this  Just the Xuande Bowl." Mr. Niu smiled bitterly, and he also knew that Chu Chen said so.  He must be sure, so he waved his hand and said: "Teacher Chu, I believe what you said!" And the holder of this small bowl immediately ran over with an excited look on his face and asked excitedly: "Teacher Chu.  "You mean, my bowl is authentic?" "Yes. Congratulations, this bowl is indeed authentic," Chu Chen said with a smile.  When the man heard the exciting news, he almost jumped up, but finally he calmed down a little.  He asked: "Then how much is my bowl worth?" Chu Chen pondered for a moment, and then said: "I estimate it is around 3.5 million to 4 million. If it goes to auction, it may be more.  Higher." "Is this so valuable?" The man's eyes almost popped out when he heard the unexpected price, and everyone else looked at him with envy.  "Indeed!" Chu Chen nodded affirmatively and said, "But sir, I would like to trouble you, can this bowl be used as a reference for us? Don't worry, it will be fine in a moment."  He nodded and agreed without much thought.  At this time, Guan Guokang said: "Xiao Chu, apart from the bubbles, is there nothing different about this plate from the real thing?" "Yes, could it be that the forgerIs it possible to imitate Subo Niqing?  "Yu Renpeng also asked immediately. "How can it be so easy!  "Chu Chen smiled and shook his head: "Every teacher should also know that the "rust spots" formed by Subo's mud green are caused by a large amount of iron ions gathering and secondary oxidation in the thick green material in the decoration. It has its own special characteristics.  Distribution.  The imitation products have more iron elements added to the chemical green material, and "rust spots" will appear after firing, and there will also be a shiny "tin light".  " " But the imitation is an imitation after all. The distribution of "rust spots" produced in this way will definitely not be so regular. If it is too much, the density and concentration of the "rust spots" will greatly exceed the iron in the composition of the suma green material.  Content, such as the "rust spots" on this plate, are denser than the genuine ones, but the counterfeiters are also more capable, and this phenomenon can only be seen through careful observation.  " "In addition to "rust spots", due to the larger proportion of Subo mud green, if the kiln temperature is normal during firing, it will not spread to the glaze surface, but will spread at the bottom of the glaze juice.  This means that if you look at the glaze from the side, you will find that all the green material decorative parts have concave phenomena, but it is not obvious where the green material is very light.  But it's not obvious on this plate, which is also different from the real thing" Chu Chen talked eloquently, and the others immediately wrote down what Chu Chen said word for word. This is a lesson from experience.  Maybe they spent a long time, but they may not be able to understand it, and the experience of these few words may have allowed them to avoid losses. ¡°It would be great if I had understood this before!  Mr. Niu sighed secretly. Yu Renpeng pointed to another plum vase and said, "Xiao Chu, what about this plum vase?"  I have just seen it. Whether it is the characteristics of the bubbles in the glaze or the "rust spots" and concave phenomena you just mentioned, they are all exactly the same as the real thing!  " "This is what I admire about the forger, but it can't be true. This Sub Bo's muddy performance is not so easy to imitate.  "Chu Chen said: "Let's just say "rust spots". If we observe carefully, we can also find some differences from the real thing, but because the differences are relatively small, I won't say more about this.  What I want to talk about is the unique bead-like condensation phenomenon of Subo Niqing.  " "This bead-like condensation phenomenon of color material will not only appear when large areas of thick green material are used to smear figures' clothing and other parts, but sometimes it will also appear when using thick material to outline thin lines such as back lines.  Obviously the forger also discovered this phenomenon and deliberately imitated it, but the imitation was very unnatural.  " Having said this, Chu Chen picked up the genuine product and said: "The cause of the bead-like condensation polymerization phenomenon is that the coarse particles are insoluble in the glaze, leaving the original metal oxide behind.  Look at the bead-like condensation phenomena on this bowl. They are distributed in dots along the direction of the brush stroke.  This is consistent with the characteristic that small particles that are not finely ground are carried by the craftsman's brush, leaving traces of distribution along the direction of the brush.  " Having said this, Chu Chen picked up the blue and white plate again: "But on this blue and white plate, it is different. Have you noticed that in these places, they are distributed in the shape of stems and veins?  That is, it will cross or even be perpendicular to the direction of pen movement.  " "This is because our current colorants are very fine, with even particle distribution, and are dissolved in the glaze at high temperatures. These dark colors are iron oxide formed by iron ions absorbing oxygen during the original process, so they can be used without brushing.  The directional distribution is why it appears like stem veins, intersecting or even perpendicular to the direction of writing.  " "In addition, I set up a kiln factory some time ago, so I also studied this information.  I think the reason why the stem-like appearance appears may be related to the gas kiln we are using now.  " Chu Chen said: "We know that only under the conditions of sufficient temperature and sufficient time can the full oxidation of iron oxide in the green material be ensured, and the glaze surface can be melted more completely.  But our current gas kiln only takes ten hours. Although the time is shortened, the process of fusing the green material with the glaze will definitely leave traces of haste, and this vein-like appearance should be the trace caused by this.  .  " Having said this, Chu Chen picked up the plum vase: "I think the blue and white plate just now should be a test product of the forger, so there are stems and veins in some places, and this one  The plum bottle did not behave like that. I think the forger should have used a cosolvent.  " "But in this way, another problem arises. The use of co-solvent will lead to insufficient firing time. Although the counterfeiter took remedial measures, it still caused the blue and white hair color to appear unclear. If  It may not be easy to see it when you look at it alone, but when you compare it with the real thing, it is very obvious.  " With that said, Chu Chen placed the plum vase next to the genuine one. With this comparison, as long as there is no eye problem, you can find the difference between the two.After more than a minute, I don¡¯t know who applauded first, and then everyone else at the scene also applauded Chu Chen
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