The opening of porcelain is a kind of knowledge that collectors and appreciators must understand.
What kind of porcelain, porcelain of any dynasty, and what kind of openings are all different.
So it is really difficult to imitate this.
However, if you don't care and just want the porcelain to open, that's easy.
There are two reasons for the chipping of porcelain, one is artificial chipping, and the other is natural chipping.
Chen Wenzhe learned about distressing, and it wasn't until he reached a master's level in distressing that he learned the manual cutting technique.
However, if you don’t have good porcelain and don’t want to imitate the five famous kilns of the Northern Song Dynasty, this kind of technology will not be used in ordinary times.
After all, the old-fashioned technology was not developed before, so even if some open-piece porcelain could be imitated, it would not be of much value.
However, it is different now because he can imitate Ru kiln porcelain.
If you want to imitate Ru kiln at a high level, the cutting technology is an unavoidable threshold.
Since you want high imitation, you must master the manual opening technology.
When opening the film artificially, you must pay attention to the device tire.
The bodies of open-piece porcelain are different, and most of them are pulp-bodied porcelain.
The so-called "slurry embryo" refers to taking soaked fine porcelain powder during embryo making, clarifying it and melting it into mud to make the embryo.
During the artificial opening of the tablets, the medicinal ingredients are prepared during the production of these slurries.
When it is fired in the kiln, it must be cut into large pieces or small pieces, which can be achieved by using different ingredients.
The porcelain fired from the kiln in this way looks like cracks when opened, but the cracks are inside the embryo.
This aspect is the difficulty in imitating Ru kiln, because the real natural opening is definitely not in the embryo.
Natural cracking occurs when the glaze on the surface of the porcelain gradually cracks internally over time, forming either a caviar pattern or a cow hair pattern.
Regardless of the pattern, the card has nothing to do with the embryo, and the opening marks will never go deep, but only open on the glaze.
Therefore, for any porcelain that naturally cracks due to age, its glaze will always appear to be cracked but not cracked, vaguely visible.
If it is opened manually, it will be suddenly exposed on the porcelain body. This is the fundamental difference between the two.
Artificial cutting began in the Ge kiln of the Song Dynasty. Since then, many kiln entrances have been imitated, and Ru kiln porcelain is certainly no exception.
Therefore, if you want to learn the cutting technology of Ru kiln porcelain, it is better to learn the technology of Ge kiln.
Chen Wenzhe had some experience in both Ge Kiln and Di Kiln.
Although he is more proficient in the Di kiln, the techniques of the Ge kiln inferred from the Di kiln, plus some inheritance, make him somewhat specialized in the firing of the Ge kiln.
Ge Kiln was founded by the elder brother Zhang Shengyi of the Zhang family, a native of Longquan County, Chuzhou in the Song Dynasty.
The Ge Kiln porcelain body is fine, hard and heavy, with many cracks and cracks like fish roe, and also has large and small fragments.
The ox hair pattern with slight yellow caviar pattern on ancient porcelain is a natural pattern.
Porcelain with natural openings is said to be found in the Chai kiln porcelain created by Chai Shizong of the Northern Zhou Dynasty. It has a bean green color with fine lines opening in the glaze.
Ding kiln porcelain of the Northern Song Dynasty is an exquisite product among ancient porcelains, and the openings among them are all willow patterns.
When Chen Wenzhe was studying secret color porcelain before, he also studied firewood kilns and even extended the technology to Ru kilns.
These accumulations are the basis for the current imitation of Ru kiln porcelain.
As for Jingzhen, there is even more in-depth research on Kaipin porcelain.
After all, the company has a very long history, even in the Southern Song Dynasty, it produced Fending.
In the Southern Song Dynasty, some films were opened in Jingzhen Fending, but of course some were not.
Gu Ho
In addition to Jingzhen, there are actually many other kilns in the country that produce split-piece porcelain.
If a technology cannot be made by modern people, it is said to have been lost.
In fact, if you study it carefully, it may not have been lost, but it has just been transformed into other technologies.
For example, if the Ru kilns of the Song Dynasty disappeared, did the split porcelain also disappear?
No, the Pingyang Kiln of that period, also known as Tuding, also had many snake-patterned porcelains.
In the Chang'an Yao kiln of the Song Dynasty, there was a type with a thin body and fine glaze with dark flowers. The glaze was extremely fine and had open flakes.
People who don't know often mistake it for Ding kiln. The hidden flower openings of Yao kiln porcelain are slightly different from Ding kiln porcelain, and non-appraisal experts cannot identify it.
The porcelain of Jian kiln in Song Dynasty has a white color, which is quite similar to that of Ding kiln, but it has no openings, which is the difference between the two.
In the Qing Dynasty, the porcelain produced in Lang Kiln was divided into successive generations.
All porcelains have openings on the inside and outside, with light grass swirl patterns on the bottom and dark red color like coagulated cow's blood. They are pre-made products.
Another kind of Lulang kiln porcelain, with lovely dark green color and full of fine cracks.
In fact, this is a work imitated by Di Kiln in the Ming Dynasty. As for the porcelain of Lang Kiln, it is valued by modern people, but it is also misunderstood.
Lang kiln porcelain, as it is generally called by porcelain merchants, is actually the red gemstone glaze used in the Ming Dynasty, and not all of it was made in Lang kiln.
Moreover, some porcelain dealers misunderstood Lang Kiln, saying that it was built under the supervision of Lang Shining, a foreigner who served in the imperial court during the Yongzheng and Qianlong eras.
In fact, Castiglione never supervised the making of porcelain.
The real "lang" should refer to Lang Tingji, who was the official who supervised the porcelain industry in the Kangxi Dynasty and was the governor of Xijiang at that time.
Records can be found in "Tao Lu", "Cha Yu Ke Hua" and other notebooks.
The "Lang Kiln" in the mouth of porcelain merchants actually confused the facts of the Ming and Qing dynasties, and spread rumors and misinformation, which has become a habit.
It is this change in customs and customs that is also very obvious in the appreciation of porcelain and the changes in porcelain prices.
Initially, small pieces of porcelain cut into large pieces, and large pieces of porcelain cut into small pieces, were both very expensive in the porcelain market.
In recent times, the porcelain appreciation community has not valued the manual opening of Ge kiln, but regarded the opening of Lang kiln as valuable.
But in general, porcelain is more valuable if you can touch it with your hands and feel no traces when it is opened.
These are what Wusan pays more attention to because they are market-oriented.
However, he didn't know that the thing he was interested in might not be more important than Ru kiln porcelain.
In the end, we still have to talk about high imitation.
Whether it is a Ge kiln or a Ru kiln, the natural cracking marks will not penetrate deep into the fetal bones, and will only form cracks on the surface of the glaze.
And among the cracks, there are also subdivisions, such as hundreds of rubbish fragments.
Baijun is a type of ice crack, that is, the cracked glaze has dense lines and the pieces are relatively fine.
This name originated from Ge Kiln in the Song Dynasty, and has been used ever since Jingzhen Kiln imitated Ge Kiln.
Chen Wenzhe's choice was indeed the right one. Jingzhen has accumulated all kinds of technologies in porcelain manufacturing. Even when it comes to cutting, they have done in-depth research.
Through communication with the two old men, Chen Wenzhe also successfully acquired relatively advanced film opening techniques.
To put it simply, open glazes can be divided into two categories in production.
One is the filling type, which fills the cracks of the fired glaze with soot, etc., and the texture is black;
Colorants such as copper sulfate can also be filled in the cracks to produce brown-green lines.
The other type is the covering type, which covers the fired base glaze with a layer of colored glaze and then bakes it again to cause cracks and reveal the color of the base glaze.