Xiao Zhang, who was sitting on the side, sighed, before entering the kiln to fire, Xiao Zhang was thinking about a problem.

That is, whether these blue and white porcelain fired by themselves should be settled.

In general, ancient blue and white porcelain has always been recognizable at the bottom of the vessel.

And it's all different.

Basically, from the style and pattern characteristics of blue and white porcelain, you can tell which dynasty blue and white porcelain works this is.

And some of the modern fired blue and white porcelain works are also recognizable.

In addition to some special imitation of ancient blue and white porcelain works, special use of ancient exclusive styles.

Modern works are more of a personal style, or a more popular style.

The worst is also the knowledge of Jingdezhen to burn four words.

But none of Xiao Zhang's three pieces of blue and white porcelain were signed.

Especially the two works of the big bowl and the ruyi jar, Xiao Zhang did not pay for it.

Porcelain plate painting does not need to fall such a paragraph, porcelain plate painting is generally directly written on the painting on a certain year, a certain month, a certain day, who who painted in what place, and then a chapter similar paragraphs can be.

It's still very beautiful when fired together, and it's very recognizable.

After all, this porcelain plate painting is a kind of blue and white porcelain work that was more popular in the late Qing Dynasty and the Republic of China, and even in modern times.

So those traditional styles don't have a place.

Xiao Zhang actually has his own considerations.

After all, this is the first time he has fired blue and white porcelain, and it is still an entry-level firing technique, so it can be said that the firing is not the best work, and it is still fired in Ouyang Feng's home, this old man just wants to see his skills.

It's a bit unstable to make a money yourself.

So it's better to leave it blank directly, and it will be regarded as a practice work.

It is also able to let Xiao Zhang intuitively recognize what his current level of blue and white porcelain firing is.

So Xiao Zhang did not settle down.

After all, this is not a large-scale competition, if he participates in any competition, then Xiao Zhang will definitely lose money.

Looking at the temperature in the kiln behind him, Xiao Zhang began to adjust.

Under normal circumstances, the maximum temperature of firing blue and white porcelain is 1330 degrees, and the firing time is about ten hours.

After the firing is completed, the cooling time is also very long, about 12 to 18 hours.

Wait until the temperature in the kiln drops to room temperature before opening the kiln.

And this temperature from the beginning of the normal temperature to the highest 1330 degrees, there is also a process.

The average firing temperature of this blue and white porcelain is normally controlled at more than 1,000 degrees, generally 1,000 degrees, 1,200 degrees, and the highest is 1,330 degrees.

At the beginning, the blue and white porcelain was roasted, the oxidation flame was used in the early stage, and the smoke was used at the end of the kiln, and the flame at this time was a reducing flame, which appeared black after a short period of penetration.

The firing temperature is around 1000.

The surface of some black pottery is black and shiny, and the carcass is as thin as an eggshell.

White pottery is white pottery fired from kaolin, the tire is delicate and hard, and the firing temperature is about 1000.

And China's Jiangnan region and the southeast coastal area, there are two kinds of common blue and white porcelain, one is gray, the tire is hard, the surface of the vessel has a gray transparent green glaze, the glazed pottery with a firing temperature of 1,200 degrees, its physical properties are close to porcelain, the raw material is kaolin, the water absorption rate is very low, the heat is 1,200 degrees, and there is a metal sound when knocking.

Therefore, this glazed pottery is called primitive celadon.

The other is that the tire is red, and the surface is green, yellow, and yellow-brown low-temperature glaze, and there is lead as a flux in the glaze, so it is called lead-glazed pottery.

Of course, after opening the kiln, it is dried at a temperature of 60 or 70 degrees, then preheated to about 600 degrees, and finally heated to a high temperature of 1,300 degrees, and finally cooled down.

For some small dishes, the thinner carcass can be fired in as fast as six hours, while the thicker blue and white porcelain carcass takes ten hours.

Many times, many people think that the higher the general temperature, the more fully the ceramic is porcelainized, and the higher the temperature of the fired ceramics, the better, which is actually wrong.

The kiln temperature is determined according to the mud tire and glaze, for example, the porcelain clay must reach more than 1,100 degrees to be completely porcelainized, but the melting degree of the general clay is low, such as the firing temperature of the Neolithic red pottery and gray pottery is only a few hundred degrees.

If the firing temperature is too high, it may melt!

The firing temperature of the Indian hard pottery in the Shang and Zhou dynasties may have reached 1,000 degrees.

Modern pottery has greatly improved the refractory of clay by increasing the silica content in the clay, and the firing temperature can reach 1,300 degrees.

On the contrary, if it does not reach the temperature it should be, it will be burned! That is, it will be a failure.

The firing situation of glaze and color is the same as that of clay, and the firing temperature required for different glazes and colors is not the same.

Just like the Tang Sancai fired by Xiao Zhang before belongs to low-temperature lead glaze, the firing temperature is about 800 degrees.

The blue and white porcelain and glaze red that belong to the underglaze color require a temperature of more than 1,000 degrees or even 12300 degrees to achieve satisfactory results.

As for some porcelain with glaze color, such as pastel, five-color, and new color, a few hundred degrees of baking is enough.

In the industry of craftsmen firing ceramics, there are still a lot of things to say.

Just like the previous national joint exhibition, it is divided into daily ceramics and craft ceramics.

In addition to daily-use ceramics and craft ceramics, there is also a kind of architectural ceramics.

The firing temperature as a whole is a little lower than that of process ceramics.

The last special is also called special porcelain, which is a kind of porcelain that is more difficult to say, with a very low firing temperature, and a special ceramic with a suitable high-tech application range of more than 1,800 degrees firing temperature.

As for the ceramics fired by Xiao Zhang, they all belong to the craft ceramics.

It is mainly divided into overglaze and underglaze firing processes.

Overglaze porcelain is a porcelain handicraft that is made after it has been fired.

So far, the three types of ceramics fired by Xiao Zhang are Ru porcelain, Tang Sancai and blue and white porcelain.

Ru porcelain and Tang Sancai have not yet reached ...... Overglaze color underglaze color ......

Because they only have glaze...... There is no color ......

Only blue and white porcelain is considered a type of underglaze color.

Whether it is pastel or colorful as just mentioned, they all belong to the porcelain category that was only famous in the Qing Dynasty.

Especially pastel, basically, except for the three emperors of Kang Yongqian, the entire Qing Dynasty is the world of pastel!

Xiao Zhang still knows this, when will this pastel be fired?

It depends on when the system gives it to itself......

Of course, until now, Xiao Zhang has reached the firing of blue and white porcelain, and will soon reach the porcelain of the Qing Dynasty......

In addition to pastels, there is also a type of porcelain that is exclusive to the Qing Dynasty!

Known as the queen of porcelain enamel!

It's like porcelain......

In the Qing Dynasty, there was only a little brilliant time, and it disappeared in the long river of history!

Thinking of these, Xiao Zhang really looked forward to it!

After all, in the Palace Museum, another batch of porcelain that Xiao Zhang was fascinated by was the extinct enamel of the Qing Dynasty!