My system is not decent

The glaze color of ancient porcelain is affected by many factors.

For example, colorant, flux, firing temperature, firing time, chemical atmosphere in kiln, thickness of glaze, trace elements in glaze, thickness of glaze layer, glazing process, ratio of glaze formula and porcelain body color.

Seeing a seemingly standard piece of Ru kiln porcelain, it should be well done in a series of factors that impress the glaze color.

In other words, now that Chen Wenzhe can learn the formulas of colorants and fluxes through this piece of porcelain.

Through this piece of porcelain, you can look back and see the firing temperature, firing time, and even the chemical atmosphere in the kiln.

If you study more deeply, you can know the thickness of the glaze, the trace elements in the glaze and other details through the production of this porcelain.

In the glazing process, you can experience the thickness of the glaze layer and the exquisite glazing process.

Finally, the ratio of the glaze formula and the color of the porcelain body can be seen how it is made.

These series of details are all techniques, secret recipes, and even eternal mysteries.

It is a great gain to be able to learn any of them, not to mention all of them.

And this is just one of the techniques for making Ru kiln porcelain.

There are many factors that affect the glaze color. For example, in the same glaze color, the glaze color with thicker glaze layer is relatively darker, and vice versa.

If the thickness of the glaze layer is different, some glaze colors will undergo qualitative changes.

For example, Lang kiln red glaze porcelain generally has almost white glaze along the edge of the mouth. This is one of the characteristics of Lang kiln red glaze. The glaze layer of the glaze must reach a certain thickness to form a red layer in the middle of the glaze layer.

Also, the chemical atmosphere in the kiln is different, resulting in different glaze colors.

Take the official kiln porcelain of the Southern Song Dynasty as an example. Although they are all lime-alkali glazes, and the enamel is as moist as jade, the glaze fired in an oxidizing atmosphere is blue, and the glaze fired in a reducing atmosphere is beige.

In addition to the above, one of the biggest features of the glaze color of Ru Kiln is the use of agate in the glaze.

Its most representative glaze color is sky blue. If we compare the glaze colors of Ru kilns, the sky blue glaze color Ru kiln is the most precious, the pink glaze color Ru kiln is next, and the sky blue glaze color Ru kiln is very precious.

Ru kiln, in the Song Dynasty, it was believed that the white porcelain in Dingzhou had awns and was unusable, so Ruzhou was ordered to build a green kiln.

Agate shavings is glaze, deep like elder brother, slightly yellowish, some like egg white, really so-called light blue color, the juice is as thick as fat pile.

Before the Song Dynasty, the Ru kiln in the Tang Dynasty was able to produce relatively high-quality Ru kiln celadon. Afterwards, the firing process was further developed, and the azure glaze color of the celadon was fired more purely until the pure azure glaze was covered. Fire it out.

When Chen Wenzhe observed the glaze color of Ru kiln porcelain, he found that the thickness of the glaze surface was different, and the expression forms of the glaze color were also different. The glaze color of the thicker glaze surface would be better.

He knew that Ru official kiln porcelain needs to be fired twice, so its glaze color will be more diverse in comparison.

On the thick glaze of Ru kiln, the glaze color is as thick as jade, while on the thin glaze of Ru kiln, it is translucent and has a strong opacity feeling.

The glaze of the Ru kiln porcelain fired for the palace is basically filled with agate. After the agate is glazed, special crystals will appear on the glaze surface.

The glaze material, glaze layer, glaze color, and enamel quality are obviously all right, and the resulting film is also perfect.

Therefore, the more the identification was made, the more cautious Chen Wenzhe was.

This level of porcelain is worth more than a national treasure bronze.

Of course, its research value, cultural value, and historical value are not necessarily higher than any bronze ware.

However, simply comparing the market value, any opinion on Ru kiln porcelain in the Northern Song Dynasty is a national treasure.

谷抴

Seeing now, Chen Wenzhe has already figured it out in general. If there are no flaws in other aspects, this time the harvest will be great!

Resisting the excitement in his heart, Chen Wenzhe, as a professional appraiser, once again settled down to appraise carefully.

The glaze is fine, but what about the tire?

Look at the bottom first when looking at the fetus, or in other words, you must first look at the bottom when looking at porcelain.

I didn't look at it before, mainly because it was unnecessary, because the glaze in the first step is not good for high imitation Ru kiln porcelain, and there is no need to bother to check the others.

The bottom characteristics of Ru kiln porcelain are also obvious. Judging from the number and specific gravity of Ru kiln, most of Ru porcelain has a flat bottom.

Ru kiln porcelain has a variety of shapes, but they are all flat-bottomed, which is one of the main bottom shapes of Ru porcelain.

The practical function of Ru kiln porcelain determines that its bottom is mainly flat.

At the same time, the nail traces on the bottom of the Ru kiln are very small, about the size of a sesame seed. These are called sesame nail marks. There is no standard for such sesame nail marks, and judgments are mainly based on experience.

If there is no problem with the bottom, then through the exposed body at the bottom, you can see that the body color of this porcelain is delicate, because the body soil contains a small amount of copper elements, and you will see signs of slight redness when you look at it in the sun, and it is slightly pale. Yellow, which is commonly known as "Xiang Ash Ru Porcelain".

Of course, among the Ru kiln porcelain handed down from generation to generation, some inner tubes are off-white, slightly whiter than other Ru kilns, which is also an important feature of the Northern Song Dynasty official kilns.

The glaze color of Ru kiln is generally glazed with agate, and the surface is mostly sky blue and light blue, and there are also glaze colors such as green, dark green, and moon white.

The glaze is warm and white, pure as jade, with a hint of ghee texture, slightly translucent.

Observe with a magnifying glass, you can see small bubbles like morning stars under the uranium.

Of course, the overall glaze color must be warm and simple, bright and lustrous, moist and pure in color, with crystal patterns.

This is the main feature. As long as it is Ru kiln official kiln porcelain, it must have the beauty of jade but not jade.

And this one seems to be very beautiful, because in Chen Wenzhe's eyes, the glaze color of this piece of Ru kiln porcelain looks like the setting sun and sunset, and it seems like the sky is clear after rain.

This fully expresses the variety of Ru kiln porcelain.

Not to mention other aspects, just being able to do this, that is, being able to change its color, makes this piece of porcelain extremely precious.

Through the glaze color and glaze layer, Chen Wenzhe can still see the fine air bubbles under the glaze.

The air bubbles under the glaze on this porcelain are not very noticeable, but can be seen with the eye.

This is just right, the bubbles are not too big, and it does not affect the beauty of the porcelain glaze layer.

Chen Wenzhe knows that for some Ru kiln porcelains, the air bubbles under the glaze are not even obvious, and can only be seen clearly under a high-power magnifying glass.

In this way, the beauty of the morning stars will not be seen.

Withdrawing his gaze, he looked at the device tire again, which can also be said to be a bone tire.

"Can you knock and hear the sound?"

Chen Wenzhe raised his head again and looked at Wu San.

"Okay, just be careful and don't break it!"

Wu San was already smiling at this time, because he could tell that Chen Wenzhe was getting more and more serious.

At the beginning, I was careless, but now I am startled every step of the way!