My system is not decent

Chapter 1112
There must be a reason why a new kind of porcelain that has been fired for more than two hundred years has become popular all over the world and has become recognized as a world famous porcelain.

Bone China can be said to be a kind of porcelain that is unexpectedly fired like fat and jade.

As for traditional Chinese porcelain, how difficult is it to make it as fat as jade?
They paid a sky-high price for a little bone meal, so they did it directly.

Because of the bone powder component, it can increase the hardness and light transmittance of porcelain, and its strength is higher than that of ordinary porcelain, so it can be made thinner, more transparent and whiter than ordinary porcelain.

As a result, bone china, a new type of porcelain, was born. After this kind of bone china is made, it has a thin and translucent body and great toughness.

In addition, because the in-glaze bone china is made by melting the picture in high-temperature transparent glaze, the picture is not easy to wear and fall off.

This kind of porcelain can directly obtain the effect of "thin as paper, transparent as a mirror, sound like a chime, and white as jade" without too much troublesome process and high technology.

With this kind of quality, coupled with the characteristics of fine and transparent porcelain, beautiful and elegant shape, moist and bright color surface, and colorful flower surface, it has achieved its pure white texture and luxurious shape.

Porcelain produced in this way has the dual value of use and art, so it is naturally sought after by the world.

Compared with all kinds of domestic porcelain, ordinary people certainly cannot achieve the level of "thin as paper, transparent as a mirror, sound like a chime, and white as jade".

But making bone china is really not difficult, as long as you understand a few key points, you can make qualified bone china.

High-quality bone china is generally formed by adding a large amount of bovine bone powder with less impurities to the raw materials of feldspar and silicate clay.

However, since the raw material contains a large amount of bone powder, the viscosity of the soil becomes smaller, so in the production process, extra care must be taken in forming.

Especially in the process of firing, we must pay attention to several key orders.

First, after forming, it is alkene fired at the highest temperature of 1250°C.

During the firing process, due to the very large shrinkage rate of bone china, the finished product will shrink by 20% after kiln firing, and the general porcelain will shrink by 7%.

Therefore, the shape is easy to deform, and plates, bowls, etc. must be placed on special Kuang bowls to cook for a long time.

Afterwards, shape bending and dimension inspection are performed.

After the surface is ground, the glaze is sprayed with a sprayer, and it is put into a kiln for glaze firing at 1150°C.

Then there is coloring. The general coloring method is to paste transfer paper on the white texture product and fire it at 820°C.

After firing, it needs to be inspected.

Each itinerary is strictly inspected, and qualified products are sent to the next itinerary, and finally made into finished products.

The final finished product has a beautiful color and is particularly easy to recognize.

Due to the powder contained in bone china, the porcelain itself presents a natural milky white color.

In layman's terms, it has a little yellow.

This feature cannot be imitated by any other porcelain.

Then there is permeability, the reason why bone china itself is made into a formula, and another important external feature is permeability.

But this feature is not exclusive to bone china. Shell porcelain, white porcelain, and pearl porcelain on the market still have permeability as long as they are made thinner.

However, there is a difference between bone china and their permeability.

For customers, put the bone china under the light bulb to see that the high-grade bone china with high bone powder content is transparent as a whole.

Bone china with low bone meal content is also significantly different from other types of porcelain in terms of transparency.

Moreover, for porcelain of the same thickness, the permeability of bone china is much higher than that of similar porcelain.

The last thing is the sound. When two high-grade bone china products collide lightly, the sound is as pleasant as the sound of a wind chime, and there will be an echo for a few seconds, while other types of porcelain basically do not.

It is because of the above reasons that in the production process of many modern high-end porcelain, some people choose bone china white body, so that painting and glazing on it can make the quality even higher.

Of course, whether there is a possibility to guarantee the quality and increase the firing rate is a matter of opinion.

This Chinese red bowl that only appeared in the Spring Festival Gala, the most difficult thing is not firing the white body of bone china, nor the complicated decoration on it, but the firing of the bright red glaze color.

As for the firing of copper-red glaze, Chen Wenzhe already has extremely rich experience, so in his hands, even if the success rate is not high, he can make two or three of the ten red bowls he makes.

This is already better than ten burns and nine times, and the success rate has increased by two or three times.

After making this small bowl, Chen Wenzhe thought about it and made many hand-painted cherry bowls.

This is also a Chinese red bowl, but the top is hand-painted cherries, embellishing the whole small bowl.

This is easier to make, and when a large batch is finished, it can be fired directly into the kiln.

During the trial firing, a small kiln was used to fire other porcelains occasionally.

Chen Wenzhe will not be idle, nor does he have to wait.

He just needs to do it step by step without stopping. After all, the porcelain embryos produced need to be dried in the shade and aired.

In addition to firing the kiln, it takes several days to make each kind of porcelain.

Step by step, the final kiln firing is definitely a masterpiece.

On this day, another batch of Chinese red porcelain came out of the kiln, and they were all exquisite small bowls.

Chen Wenzhe finally breathed a sigh of relief when he saw that the shape of the bowl was relatively complete without much deformation.

He really didn't expect that the firing of bone china and red glaze would be so difficult.

Especially the small bowls with intricate patterns and paintings on them are more difficult to fire.

At the beginning, he was very confident, but after the first two kiln openings, his self-confidence has almost been lost.

Even this time, the effect is not very optimistic, especially the glaze color.

Among this batch of small bowls, the glaze color of some small bowls has no texture, and the glaze color floats on the surface, looking frivolous.

While that's still good, there are others that are simply localized redness with no overall effect at all.

If this was in ancient times, it could also be regarded as kiln-transformed porcelain. This kind of red that occasionally appears locally is also considered rare and rare.

But now he is firing a bright red Chinese red. If such a porcelain bowl appears, it can only be classified as a failure.

Chen Wenzhe has not encountered such a situation for a long time, and it was only at this time that he really realized why the red glaze was only fired successfully in the past few decades.

And even if it was invented by some modern masters, there is actually a saying that nine out of ten kilns fail.

Although blue and white porcelain is a very remarkable existence, but in terms of the difficulty of firing, it is still red porcelain!

There are many factors in this, the main one is that the blue and white hair color does not have too strict requirements on the firing conditions, while the red hair color is very strict.

Red firing on porcelain has already appeared before the Song Dynasty, but almost all of them have no texture, and the glaze color floats on the surface, looking frivolous.

It was not until the Jun kiln in the Song Dynasty that the red color with thickness and depth was fired for the first time.

But this red is only occasional, rare and rare.

(End of this chapter)