Longshan black pottery is divided into three types: fine mud, mud and sand. The fine mud thin-walled black pottery has the highest production level.
The tires made from this fine mud have a tire wall thickness of only about 0.5-1 mm.
The thinnest ones can reach 0.1 or 0.2 millimeters.
And the reason why it can reach this level must be a gift from the Yellow River.
It was the existence of such a mother river that deposited a large amount of high-quality clay on the Qilu land, which laid the foundation for the prosperity of the Guantao pottery industry.
Chen Wenzhe used river mud to make small red clay pots before, and also used Yellow River mud to make cricket pots. Now he uses this Yellow River red mud again.
It was this kind of red clay that laid a solid foundation for the development of Qilu ceramics and porcelain industry.
Red clay is a kind of soil with pure and fine texture and high soil density.
The production of Longshan black pottery is made from pure and delicate red clay.
After being brushed and discarded by water and wind, it became a purified "floating soil".
The iron content and alkali metal oxide content are relatively high, which makes it thin and strong during production and forming.
When dealing with this kind of soil, it needs to be smoothed, settled, and loosened.
After that comes a series of delicate manual operations such as drawing, calendering, calligraphy, painting, and carving.
Finally, it is decorated, sealed in the kiln, and fired.
The black pottery fired in this way has an extremely fine texture, giving people a smooth and moist feel.
Of course, the wall of the container must be very thin, and it has the ability to be blown through.
If the firing is successful, the surface of the final eggshell pottery will be extremely bright, like a bright mirror, and the texture will be very hard, making it look like steel.
Not only that, its quality and color are divided into three types: jet black, silver gray, and orange.
Its color ranges from dark to light, rich to dull.
According to the various characteristics and requirements of different utensils, the different colors are increased or decreased, and finally each has its own color but the color is moderate.
Therefore, if you want to make qualified eggshell pottery, you must have suitable fetal soil.
Chen Wenzhe was not in a hurry to make, so while he was studying eggshell pottery and eggshell porcelain techniques, he was waiting for qualified materials to be sent from China.
Anyway, he will not be idle during this period. You must know that making eggshell pottery is just an episode in the process of making Ru kiln porcelain, enamel color, Tang Sancai, Chinese red, and ordinary copper red glaze porcelain.
Until now, he has not completed the imitation of all copper-red glaze porcelain, nor has he had time to produce the top-notch Chinese red porcelain.
He is just accumulating skills now. When all the porcelains he can make are successfully produced, his various skills will definitely break through to the master level.
For example, now, clay training skills must reach the master level.
If you want to make qualified eggshell porcelain, you need to reach the master level in embryo drawing technology and embryo extraction technology.
Otherwise, even if he had qualified materials, he would not be able to make a device embryo with a wall of only 0.2 millimeters.
If there is no such a thin embryo, how can we make truly thin-bodied porcelain?
In fact, many of Chen Wenzhe's skills should have reached the master level now, such as kiln firing, clay training, and carving.
As for drawing, cutting, carving, painting, printing, etc., these need to be verified during the process of making eggshell pottery.
The process of making porcelain is just that. If you carefully calculate it, if you break through all his craftsmanship levels, you will definitely be above the master.
As for whether Da has reached the Grandmaster level, it's hard to say.
Now he can only improve and verify his skill level by making top-notch ceramics.
Time flies by. Anyway, Chen Wenzhe’s job is to make porcelain. He doesn’t go out and just concentrates on making porcelain.
On this day, a batch of raw materials entered the factory.
The geographical location of South Vietnam is really very hesitant, especially the shipping speed is very fast.
Generally, the time from placing an order to receiving the goods from Chen Wenzhe will not exceed one week.
Among this batch of supplies, there was clay for making eggshell pottery, as well as some suitable clay and porcelain clay shipped from Dehua and Jingzhen.
With these things, he can make eggshell porcelain.
At this time, he already had an extremely mature clay training plan in mind.
In addition, he did not just make things behind closed doors through the Sui Marquis Pearl. After all, in his hometown, Qilu, there were many ceramic factories making eggshell pottery for a long time.
Therefore, it was not difficult for him to buy suitable materials, and what he bought this time were some semi-finished products.
If you don’t pursue excellence, you can actually use it as a finished product.
Of course he would not use it directly. After the red clay fell into his hands this time, he would definitely have to deal with it.
However, Qilu was a professional after all, so he just processed it a little and turned the red clay into a qualified raw material for firing eggshell pottery.
With qualified clay, coupled with a high-speed and stable pottery cart, the foundation is laid for the production of eggshell pottery embryos.
It is made by hand, using traditional single-layer drawing to form a billet, or simply a double-layer composite billet.
As long as the embryo is formed, the subsequent steps are not difficult.
Using a pottery cart to pull out embryos by hand requires speed and stability, but Chen Wenzhe's hands can show off his power.
Most of his talent lies in his hands.
For example, with his sense of perception, he can sense any slight unevenness or unevenness there.
It turns out that this talent is not very useful, that is, it can make the surface of porcelain even.
But the current ones are different, because this is eggshell pottery. The drawing speed is too fast, and the wall of the pot is too thin. As long as the speed is not controlled well, any unevenness in the wall will be caused.
It may cause irreparable damage to the embryo.
After all, his embryo drawing and embryo sharpening techniques have not yet reached the master level, so failure is inevitable.
The embryo is quickly drawn to produce eggshell pottery as thin as an eggshell, which requires a very strong hand feel.
In this process, he failed too many times.
Especially at the beginning, the speed was slow and the effect of thin tires could not be achieved.
A slight increase in speed will often cause the device to break.
The wall of the eggshell pottery is really too thin. If you don't pay attention, it will be pulled away directly after rapid drawing.
Even though Chen Wenzhe's talent is invincible, it took him more than two hours and countless failures before he could get the speed of the turntable a little bit, so that he could achieve the desired effect without going too fast and causing damage to the thin wall of the embryo.
destroy.
After successfully making a thin bowl at first, he no longer dared to continue drawing the embryo. Instead, he started to peel the embryo after drying it for a while.
At this time, through careful trimming and cutting, the embryo can be made thinner and more regular.
Of course, this step is not easy. After all, the embryo itself is very thin and you still need to trim it.
At this time, when the turntable moves, if the bamboo piece in your hand exerts a little force, the wall of the bowl will be cut directly.
Even if you don't use tools, just use your hands, and sometimes a little force will cause the tire to deform and break!
This is the difficulty of making thin ceramics. It is too fragile and has no room for error.