My system is not decent

Celadon is a large family and the origin of porcelain, so it is naturally very important.

After the Song Dynasty, the charm of celadon became even more dominant.

Among the five famous kilns in the Song Dynasty, four were related to celadon.

Among them, the story of Longquan Kiln is even more legendary.

This kiln, which existed from the Three Kingdoms and Jin Dynasties, was still unremarkable until the Northern Song Dynasty.

However, after the fall of the Northern Song Dynasty, Longquan kiln combined southern art and northern technology, but created the pinnacle in the history of celadon in my country.

The mature firing technology and dignified and elegant style make Longquan Kiln famous all over the world.

The successful firing of pink green glaze and plum green glaze is even more ingenious, leaving a glorious page in the history of Chinese porcelain.

From the perspective of modern craftsmanship, the firing and development of celadon is a particularly important process and technology in the history of Chinese ceramics. It is a process from accidental discovery to deliberate use of technology.

This is the technical innovation result of the continuous increase and decrease of iron element in the glaze of porcelain body.

But from the imagination of beauty, we are more willing to believe that the intention of cyan must be too ethereal, so the ancients used a unique method to freeze it on the utensils, so that the world can appreciate the beauty of cyan.

The rise of color as a means of artistic expression was accomplished unconsciously by the ancients.

When the ancients discovered that porcelain was not just a vessel for use, the charm of art emerged from it.

In the chaos of nature, a ray of green is often pleasing to the eye, and this awakening is the pioneer of celadon art.

The predecessors of all celadon are things that the ancients could do nothing about.

The iron content of the glaze determines the color of the green glaze, but the ancient craftsmen were unable to grasp the coloring conditions for a long time, and fell into distress.

After that, in a lot of repetitive work day after day, opportunities appeared by chance again and again, waiting to be captured by wise men.

The hardworking kiln workers in ancient China were the unknown wise men.

After that, all kinds of celadon appeared, among which Longquan celadon is naturally the best.

Hearing Longquan Celadon, Chen Wenzhe's eyes narrowed. Is this what he likes?

You must know that his best skill is to imitate Longquan celadon!

He really didn't expect that Wu San actually turned the topic to Longquan celadon in the Southern Song Dynasty.

Speaking of which, isn't he afraid that he will hit his foot with an axe?

Or, is this just what you want?

Sure enough, Wu San just made a start, and it was Lao Zhou and Lao Li who analyzed Longquan celadon technology in a simple way.

Just hearing it, Chen Wenzhe expressed his admiration.

If he hadn't seen the palette unearthed from the genuine Longquan kiln, how could he know what raw materials were used in the Longquan kiln?

The two old men in Jingzhen are different. They have no means to cheat, but they have a sufficiently perfect inheritance.

Due to the geographical location of Longquan Kiln, the clay used for making porcelain is naturally rich in quartz, kaolin, sericite and other minerals.

This is the natural porcelain clay and glaze!

These substances can make the tire color appear white or off-white in the reducing atmosphere of the kiln.

谷羯

And if a certain amount of purple gold soil is added to the porcelain clay, the body color will appear black, which is why Longquan kiln porcelain has two colors, black and white.

Among them, there are some key points, which can also be said to be small details, such as the color tone of the tire, which has a certain foil effect on the glaze color.

This little experience is hard to find if you don’t make it yourself, or have fired many Longquan kiln porcelains.

The color of Longquan kiln porcelain is mainly turquoise, and the color is darker. This is because a certain amount of purple gold soil is added to the fetal soil formula, thereby increasing the depth of the fetal color.

Zijin soil is a kind of soil material with high iron content, and it brings a unique glaze color to the porcelain of Longquan Kiln.

Therefore, Longquan Kiln is most proud of its green and elegant jade-like glaze color.

How to fire this top glaze color is the biggest difference between the Northern Song Dynasty and the Southern Song Dynasty!

In the Northern Song Dynasty, the glaze used in Longquan kiln was lime glaze.

So, what is lime glaze?

Previously, through his works, Chen Wenzhe had seen the composition of glazes used in the production of porcelain in the Longquan Kiln of the Southern Song Dynasty.

Now after Lao Zhou's explanation, he is more clear about what can be glazed, and what kind of minerals and raw materials can be synthesized into a good glaze.

Glaze itself is a slurry-like substance made of mineral raw materials such as quartz, kaolin, plant ash, etc., in a certain proportion and through corresponding processes-glaze slurry;

The glaze slurry is applied to the surface of the embryo body, and after high-temperature firing, a glass quality will be formed on the surface of the utensil, which is called "glaze".

Lime glaze refers to the glaze whose glaze composition is mainly limestone (calcium carbonate, silicon dioxide, etc.).

Due to its own composition, lime glaze has a low viscosity during high-temperature firing and is prone to glaze flow. Therefore, porcelain with lime glaze usually has a relatively thin glaze layer.

However, the Longquan kiln in the Northern Song Dynasty used lime glaze, so in terms of product glaze color, there is nothing particularly outstanding except for the conventional turquoise.

However, after the time entered the Southern Song Dynasty, Longquan kiln craftsmen invented lime alkali glaze, created and fired popular pink green glaze and plum green glaze products, which made Longquan kiln porcelain famous and popular for a while.

Lime-alkali glaze Chen Wenzhe naturally understands it very well. He is even more aware that there may not have been lime-alkali glaze in the Northern Song Dynasty, because he suspects that Ru kiln porcelain was fired with this kind of glaze.

Of course, the lime-alkali glaze used in the Northern Song Dynasty, or in other words, the technology of using lime-alkali glaze is different from that in the Southern Song Dynasty, which will result in the unique beauty of Ru kiln porcelain.

Now he is very sure that the thick glaze of Ru kiln porcelain should be related to lime alkali glaze.

So what's up with lime soda glaze?Jingzhen also studied it clearly.

Lime alkali glaze is a new type of glaze made by adjusting some components and proportions on the basis of lime glaze.

Such as increasing the content of potassium metal, reducing the content of calcium oxide and so on.

In this way, the lime glaze was finally improved into calcium potassium glaze.

Due to the increase of the alkali metal content, the viscosity of the glaze increases under the action of high temperature, and the fluidity decreases, thus forming a thick glaze layer.

After the Southern Song Dynasty, the Longquan kiln porcelain generally had a thicker glaze layer, which was due to the use of lime-alkali glaze.

At the same time, multiple glazing methods were adopted in the firing process, that is, biscuit firing-glazing, bisque firing-glazing, and so on for three to four times, and finally a thick-glazed celadon that is warm and moist as jade is fired. .

These techniques, together with the precious firing technique of agate glaze, can finally produce Ru kiln porcelain, right?

In this way, the invention and application of lime-alkali glaze is a huge creative improvement for celadon glaze color.

It makes the surface of the porcelain obtain a glaze effect like sapphire.

Its glaze layer is thick and the glaze surface is even and clean, just like natural beautiful jade. Isn't this also the characteristic of Ru kiln porcelain?