Chen Wenzhe already has a master's level in splicing tires, whether it is horizontal or vertical splicing.
The horizontally spliced tire and the vertically spliced tire were probably invented at the same time. If porcelain cannot be made with a horizontally spliced tire, wouldn't it be possible with a vertically spliced tire?
Cold joining is relatively simple. A new piece of porcelain is fired as a whole, and the remaining old parts are connected to the new porcelain. After gluing, polishing, and trimming, it is complete.
However, it is easy for people to see this, especially some appraisers, who specialize in looking for flaws and can see them almost at a glance.
The hot joining is different. Hot joining is really a difficult challenge.
He put the base and the newly made parts together into a high-temperature kiln to re-fire them.
When finished, it becomes a complete whole!
This is not only a technical test, but also a huge test for porcelain makers in their ceramic research!
To know what it is, you also need to know why it is the case.
Not only does the shape have to be perfectly coordinated, but the style of the era, the painting techniques, the shape of the vessel, and the glaze are all perfect!
This is simply an impossible task, but the craftsmen of Jingzhen accomplished it a long time ago.
This is mainly a shrinkage problem. When the old porcelain is re-fired in the kiln, the shrinkage is very small or even non-existent.
When the newly spliced parts are fired in the kiln, they will not shrink at all.
There is a problem here, you have to worry about the shrinkage of the newly connected parts.
Otherwise, the new part will be the same as the old one. After firing, as soon as the new part shrinks, the old part will be directly crushed or broken, and it will not be fired at all.
In fact, the problem is not limited to these, there is also the problem of new glazing.
The glaze will also shrink, so as soon as the remaining porcelain is connected to the new part and fired, various problems will appear, and these need to be solved.
Some people have even applied for patents for this technology, which is mainly a method of reducing shrinkage during the firing of green ceramic bodies.
Let’s not talk about the shrinkage problem, just a repair involves splicing, completion, hot joining, and cold joining.
If the completion is done by cold welding, it is relatively simple. If it is hot welded, there are still several processes that need to be used, such as re-painting and re-glazing. The glaze all faces shrinkage ratios.
After digesting the existing inheritance, Chen Wenzhe discovered that the level of expertise is nothing to complete the craft.
Although it can be done, it can never be flawless.
There is no other way, we can only upgrade and complete the two processes, and hot-join the two processes. As for the cold-join, if you don’t need it, don’t upgrade it yet!
After finishing the mud and waiting to dry it, Chen Wenzhe chose to study.
Thermal bonding is more important, so improve the thermal bonding technology first.
Spend one hundred achievement points and click on study.
In an instant, a large number of fragments of the thermal bonding process appeared in his mind.
After being in a daze for a few minutes, Chen Wenzhe came back to his senses.
At this time, he was a little dumbfounded. Heat welding involves splicing, completion, painting, and glazing, all of which involves controlling the temperature to control the shrinkage ratio.
The most important issue is to control the shrinkage ratio.
And if you want to control the shrinkage ratio, you have to control it by temperature.
What he gained was experience, not skills.
It was difficult to perfectly control the temperature in ancient times, but for modern people, it is easier because of the CNC gas kiln.
Perhaps because painting and splicing are both master-level skills, plus the less important glazing expertise, the knowledge he learned this time was really not that much.
Since there was not much inheritance, Chen Wenzhe simply chose to digest it completely.
Chen Wenzhe sat in front of the workbench, seemingly thinking deeply, but in fact, his mind fell into a dream.
He is already very skilled at doing this kind of thing, and he is very adaptable to immersive learning.
Therefore, he quickly began to learn the heat bonding process.
Hot splicing is considered a new craft. Looking at the scene in the dream, you should be learning modern crafts.
It's just that their level is really high.
At this time, Chen Wenzhe was immersed in the work of "joining the bottom", which is a common counterfeiting technique in ancient ceramics.
In the dream, this master of counterfeiting re-bonded, glazed and fired the bottoms of bottles, bowls and plates of famous porcelain or official kilns. A fragment of the porcelain bottom of a heavy official kiln was reborn from the ashes and became tattered.
The porcelain base was transformed into a piece worth thousands of gold.
Especially after the use of CNC kilns, the "bottom-connection" technology has become a piece of cake for masters of counterfeiting.
In the dream, Chen Wenzhe had just learned some techniques for controlling CNC kilns and fell into a dream-like environment.
In his dream, he heard a piece of news: a big news broke out in the southern antique market.
A master of antique collecting sold a Yongzheng enamel jade spring vase to a collector in Xiangjiang for 20 million yuan.
In the end, it was identified by Xiangjiang as the base of a Yongzheng official kiln vase, followed by the enamel-colored lotus and jade pot spring body. The Hong Kong authorities ordered the big collector to refund 20 million yuan.
The big collector was dissatisfied and the Hong Kong authorities produced an appraisal certificate before he obediently returned the huge sum of money.
What kind of appraisal certificate can make the famous appraisers at home and abroad bow their heads?
This great collector is an expert on Chinese ceramics from past dynasties in the TV National Treasures Lecture Hall. He is also the chief expert on the treasure appraisal columns of many TV stations at home and abroad in the past ten years.
Who issued the appraisal certificate that made him surrender? This has been the top news in the collecting circle in the past twenty years.
As expected, the meddling gangsters had a knack for digging into the heavens and the earth, and soon the news spread.
The Yongzheng enamel jade pot spring vase was produced by a master forger named Da Shen in Jingzhen.
As early as the 1980s, masters used Nanhe Jun porcelain bowls and bottle bottoms to recreate countless Song and Yuan Jun porcelains.
Because the Jun kiln porcelain glaze is thick and the bottom wall is also thick, it is fired in an old-fashioned kiln and is not easy to crack. In addition, in the 1990s, the birth of CNC gas (natural gas) kilns made the master even more powerful.
In front of the temperature-controllable kiln, he can control the temperature as he wishes, making the connection between the old sole and the new tire a smooth transition, and he no longer has to worry about cracking when the new and old porcelain are joined.
After the vase was finished, the master, through unknown means, handed over the floor plan of a Qing Yongzheng lotus enamel jade pot-spring vase collected by Buckingham Palace in the UK to an old painter from the third generation of Jingzhen for drawing.
The enamel materials for painting were also purchased at high prices from internal channels in Jingzhen, which specialized in supplying various glazes in the Qing Dynasty.
The model on the bottom of the Yu Hu Chun vase does not need to be faked, it is the official kiln model of Yongzheng.
If there is no money, it is a trivial matter to solve the problem in Jingzhen.
A master who imitates the official kiln style can charge between 10,000 and 20,000 yuan per word, which is comparable to the finishing fee of the most famous calligrapher in contemporary China.
The news that the enamel jade ewer and spring vase of the Yongzheng period in the Qing Dynasty were sold with new bases and sold at a high price quickly reached the ears of the masters.
When he heard the news, the great master was toasting with friends from out of town at the wine table.
At this time, more than half a kilogram of white wine had been consumed. The burning of the wine and the bad news that Enamel Cai had left Maicheng made the master extremely angry.