Seeing that some students recognized the quality of porcelain, Kang Lao smiled and said to his classmates: "Yes, a few students have already seen some differences. ”

The students who can come to the Capital University are very smart, and after the prompts of their classmates and the knowledge they usually learn, they instantly understand that the exposed piece of porcelain is lapis gold and blue glaze.

At this time, a bold classmate stood up and said without asking questions from Mr. Kang: "Professor Kang, why does the rest of this daffodil basin look like a modern product, but the one you enlarged is a lapis gold and blue glaze?" ”

"This classmate asked well, today I took out this porcelain to explain to you why." Kang Lao did not blame the rudeness of the student who asked the question, and said with a smile.

"When it comes to lapis blue glaze, we have to mention Jingdezhen. This glaze color was created by Jingdezhen during the Xuande period of the Ming Dynasty, and it was fired and matured during the Kangxi period of the Qing Dynasty. Lapis lazuli blue glaze is named because the glaze is composed of blue, blue, white and other color spots, which is very similar to the natural lapis lazuli color, lapis lazuli blue glaze is also known as snowflake blue glaze and sprinkled blue glaze. Kang Weiqing preached to the students.

"Real lapis lazuli and blue glazed porcelain, judging from its firing process, is very difficult. Moreover, among the various color glazes, the number of lapis lazuli blue glaze is relatively small, so lapis lazuli blue glazed porcelain is also highly prized by collectors. Kang Lao said after taking a sip of tea.

"If you are interested, please go to the Palace Museum to have a look, where there are a few lapis blue glazed vases for students' reference. Because of the small number of surviving people, it is difficult for us to see them in ordinary times. Therefore, here, I would like to praise the students who just saw at a glance that it was lapis lazuli blue glaze. Kang Lao said with a smile.

Fang Yong looked at the classmate who first recognized the lapis blue glaze, it turned out to be a junior in their department, it seemed that this classmate's professional knowledge was very solid.

At this time, Kang Lao asked his classmates again: "Students, do any of you know the current market price of lapis blue glazed porcelain?" ”

The students discussed a little below, and then saw the student who recognized the lapis blue glaze first just now stood up and said, "Professor Kang." I remember that last autumn, Guardian Auction House auctioned a lapis lazuli and blue glazed string vase, and the price at that time reached 9.2 million yuan. ”

Kang Lao nodded and said, "Yes, the market value of a real lapis blue glazed porcelain will definitely be more than five million yuan." It is precisely because of the value of this glazed porcelain that collectors do everything possible to hide its colorful colors in order not to be remembered. ”

Hearing Kang Lao say this, everyone's eyes were fixed on the daffodil basin placed on the lectern table. We all know that this daffodil basin will not reveal such a small piece of lapis lazuli blue glaze for no reason, if it is really a lapis lazuli blue glazed daffodil basin, it will be worth a lot of money! The eyes of the students who looked at the daffodil basin were full of eagerness.

After seeing the eyes of his classmates, Kang Lao smiled and said, "Do you suspect that this narcissus basin is lapis gold and blue glazed porcelain?" Don't doubt it. I can tell you unequivocally that this is a lapis lazuli glazed daffodil pot. ”

As soon as Kang Lao's words fell, the classmates began to discuss below, and suddenly there was a buzz.

Kang Lao knocked on the lectern with his notebook, and the discussion of his classmates quickly disappeared.

"Since it is lapis lazuli blue glazed porcelain, why is it the color of the surface? Now for you. Kang Lao said.

Hearing that Mr. Kang stepped into the topic, the students immediately quieted down.

"There are many disguise techniques in antique collections, including the hidden method, the hidden method, the fog concealment method, and so on. These disguises are inseparable from the wisdom of our ancient working people, who used guò to cover up. Many beautiful works of art have been preserved for us. And what I'm going to explain to you today is that the lacquer concealment method in these hidden techniques! Kang Lao said.

"Lacquer concealment? Why haven't you heard of it? ”

"This is all people's unique skills, how can it be passed on lightly?"

Some of the students whispered.

"I believe everyone is familiar with paint, and the origin of paint is still inconclusive. In the early days, most of the paints used vegetable oil as the main raw material. That's why it's called "paint". In 6000 B.C., China has improved the paint by mixing inorganic compounds and organic pigments. And the lacquer concealment method we are talking about next is a technique of using paint to hide the original appearance of porcelain. Kang Lao continued.

Kang Lao also introduced to everyone what is the lacquer concealment method and how to crack the hidden means of this lacquer concealment method. pointed to Fang Yong and the junior classmate just now on the podium to help him crack the lacquer hidden method.

The classmates all looked at Fang Yong and the junior with envy. After going to the podium, Fang Yong learned that this junior classmate was named Ding Kun. After getting to know Ding Kun, Fang Yong and Ding Kun assisted Kang Lao to crack the lacquer concealment method.

When Kang Lao entered the classroom, some school staff brought the props used to crack it.

Kang Lao commanded Fang Yong and Ding Kun to take out these props and put them on the lectern, and then said to all the students: "Students, please pay attention to watch! ”

Hearing what Kang Lao said, the staff member in charge of the camera pointed the camera at the cracking props on the podium very well. And the students in the audience also watched carefully with wide eyes, for fear of missing any details.

According to Kang Lao's instructions, Fang Yong and Ding Kun first mixed ether and turpentine in a one-to-one ratio, and then poured the mixed liquid into the largest glass container.

Then a measuring cup was used to add different doses of chemical solvents such as Tianna water, xylene, butyl ester, and cyclohexanone.

After the solvents were fully integrated, Kang Lao put on gloves and carefully placed the narcissus basin into the glassware to which the solvent had been added, and then gently stirred in the solvent with a soft brush with fine bristles.

The miraculous chemical reaction has a mysterious power, and as time passes, we see that the lacquer-like substance attached to the narcissus pot is softening and melting little by little.

Seeing this phenomenon, Kang Lao asked Fang Yong and Ding Kun to take the other two fine-bristled soft brushes to wipe the daffodil basin gently.

As the two of them wiped, the color of the mixed solvent slowly became cloudy, but the true color of the lapis blue glaze was gradually revealed.

Ten minutes later, when all the lacquer-like substances attached to the outside of the narcissus basin were dissolved, Kang Lao asked Ding Kun to pick up a bottle of mineral water and rinse the mixed solvent on the daffodil basin.

When all these mixed solvents are washed off, the colorful lapis lazuli blue glaze is displayed in front of everyone's eyes.

Seeing this exceptionally beautiful lapis and blue glazed daffodil basin, the students all shouted magically, and praised the ancient laborers from the bottom of their hearts. (To be continued......)