My system is not decent

Chapter 696 The Secret of Aging
The production process of porcelain involves all aspects, from clay refining, embryo making, embryo sharpening, coloring, glazing, to the final kiln firing.

Step by step, the presence of water molecules can actually be eliminated.

There are more water molecules in the glaze and more air bubbles, and less water molecules in the glaze and less air bubbles.

If there is no moisture in the glaze, there may be no air bubbles under the glaze.

Practicing mud is done in one step, there will be less air bubbles in the mud, and less water evaporation.

Modulating glazes and colored materials is another level.

If it is not done well, when it is fired in the kiln, the water molecules in it will destroy the glaze layer, making the fired porcelain impossible to see at all.

Therefore, it still depends on the craftsmanship. If any process is not done well, it will produce very bad results.

This was an unexpected harvest. Chen Wenzhe really didn't expect that he could learn some operations to reduce air bubbles through this secret color porcelain.

The air bubbles in this secret-color porcelain are rare, mainly because the production level has been improved, the production process has been improved, and the ore soil used to make porcelain has been ground more finely.

Only in this way will the structure between the matrix molecules be more dense.

If the glaze layer covering the surface of the carcass is also thickened, most of the water molecules contained in the carcass will be fully volatilized during the drying process, and the air bubbles will naturally decrease.

However, there are also some water molecules, which are wrapped in the dense carcass and deep in the mud, so it is difficult to volatilize only by the sun and wind.

In the early stage of the firing process, some water molecules were able to break free from the constraints of the porcelain body and successfully escaped volatilization.

However, there are still some water molecules entangled deep in the carcass, which are driven away by the gradually increasing temperature after reaching a certain temperature.

This part of the water molecules will decompose into gas and escape from the carcass.

At this time, the glaze liquid covering the surface of the carcass has completely dissolved into a highly viscous mucus-like inclusion, which is tightly wrapped on the surface of the carcass.

The water molecules that escaped from the carcass and were decomposed into gas, because they were unable to break free from the constraints of the mucus-like inclusions, eventually became captives of the mucus-like inclusions and were suspended between the carcass and the glaze layer.

After the porcelain is fired and cooled, these gaseous water molecules are stored between the carcass and the glaze in the shape of round and bright hollow spheres.

This kind of hollow spherical object, like a pearl, exists in the glaze, which is what we call "bubbles" in the glaze.

They have undergone the baptism of high temperature and exist in the form of colorless spheroids.

Without underglaze color, they will exist as shiny spherical colorless air bubbles.

Against the background of underglaze blue and white, they become shiny spherical blue-green bubbles.

Looking at the secret-colored porcelain lotus bowl in front of him, Chen Wenzhe showed a hint of joy on his face.

This kind of well-preserved porcelain that has never been seen in the world is really rare.

Therefore, although it has enough signs of aging, the aging, decay, and even death process of the internal bubbles can all be displayed in front of Chen Wenzhe.

Although this process is relatively long, with the help of Sui Hou Zhizhu, he can fast-forward this process, allowing him to see the death process of the bubbles inside.

Yes, these bubbles cannot exist all the time, and they will also collapse and die. This is actually the aging process of porcelain.

It turned out that Chen Wenzhe couldn't see this clearly, but now, he not only saw it clearly, but also understood it thoroughly.

How did the bubbles in the porcelain glaze die?
Why do air bubbles in porcelain glaze die?

This is closely related to the use, spread and preservation of porcelain after firing.

Through careful observation of porcelain bubbles, it is not difficult to find that, usually, the bubbles in porcelain glaze are divided into large, medium and small.

The size of the large bubbles is also restricted by the thickness of the glaze layer.

Generally speaking, the thicker the glaze layer, the larger the air bubbles, and the thinner the glaze layer, the smaller the air bubbles.

And those air bubbles that die naturally are all round bubble tops, large bubbles close to the glaze.

The air bubbles that die due to the opening of the porcelain glaze and are crossed by the line are large, medium and small.

However, dialectics holds that matter is always in a state of motion and change.

Porcelain fired from minerals is no exception.

This movement and change is affected by both self-factors and external factors.

The porcelain that has just been fired into a vessel, the molecular structure of the glaze is in an active stage.

The energy generated by molecular activities gathers on the glaze surface and emits a very dazzling light.

We call this kind of light "stealing light". We often hear people say that a certain utensil is too angry, and this "fire" refers to this "stealing light".

Over time, new equipment becomes old equipment.

Molecules active on the glaze surface of the utensil escape, taking away part of the energy, changing the molecular structure of the glaze surface, and completing a new combination.

At this time, from the active state when the device is fired into a stable state, this is the function of internal factors.

The gentle sunlight, the breeze blowing like silk, the grinding of human fingers, etc., have gradually worn away the top of the large bubbles close to the glaze.

Inside the bubble that was originally in a vacuum state, a phenomenon of "air leakage" that is difficult to observe with the naked eye appears.

The air carries the dust into the bubbles, where they are suspended.

The originally bright bubbles became cloudy.

The dazzling "thief light" gradually weakened.

In the rainy season, the dry air is moistened, and the originally fine and light dust is also moistened.

The suspended air can no longer bear the weight of the dust, and they fall to the bottom of the bubbles where they are deposited.

As a result, the turbid air bubbles are "dyed" yellow, ocher red, gray or dark brown by living dust.

This is the result of external force, at this time, the bubble has completed the initial stage of death.

As time goes on, the gap at the top of the bubble gradually becomes larger, becomes a line, and then expands into a cross, completing the intermediate stage of bubble death.

Afterwards, the circular small hole further turns into a large hole, and finally becomes a circular pit, completing the whole process of bubble death.

In the process of bubble death, the glare of the light completely disappears, and the glaze becomes warm and soft.

This is what we call "aging" and having "patina".

By observing and analyzing the distribution and changes of these ancient porcelain death bubbles, we can get some basic laws of bubble death.

The older the age, the denser the distribution of dead bubbles in the glaze;

The older the age, the more "one" or "ten"-shaped lines appear on the top of the death bubble rupture;

The death bubbles of ancient porcelain from the Song Dynasty and above have basically burst into a circular pit, and a lot of domestic garbage is still deposited in the pit.

But this one, because the seal is so good and the technology is very good, there are not many cracked circular pits on the surface of its glaze layer.

Yes, not much, which just shows the degree of aging without destroying the beauty of this porcelain in a large area.

Otherwise, the surface of the porcelain will become pitted, so the beautiful layer of spring water will not be visible?
(End of this chapter)