My system is not decent

It is impossible for any craft technology to appear out of thin air, and of course it is unlikely to disappear.

What you think disappears is sometimes transformed.

Just like Jun Kiln, has it really disappeared?

If it really disappeared, what happened to the kiln behind the Miao family?

In fact, after researching, many techniques of Jun kiln can be found in other kilns.

This mainly depends on the characteristics. To sum up, if you want to fire a qualified Song Jun, you must pay attention to the characteristics of "kiln transformation".

There is a reason for the appearance of this kiln change feature.

The first is the active formula in the glaze, and the second is the close relationship with the kiln structure.

In addition, what also affects the yield of Jun porcelain is the fuel used.

There are also some image factors, that is, when the kiln is installed, the porcelain inside is sparsely arranged.

The last is external factors, such as cold and heat, sunshine and rain, wind direction and so on.

All of these require the experience of kiln workers to adapt.

Only when everything is ready and with the ability of kiln workers and craftsmen can a qualified Jun porcelain be fired in the end.

Otherwise, there will be the ending of ten kilns and nine failures as the ancients said.

Jun porcelain belongs to high-temperature kiln-transformed porcelain, and its remarkable feature and essence is natural kiln transformation.

The firing of Jun porcelain generally adopts two main processes: plain firing and double firing.

When refired to 850 degrees Celsius, the glaze begins to melt.

As a result, various oxides in the glaze penetrate and fuse with each other, forming a wonderful spectacle that is colorful and dazzling.

In the history of my country's ceramic development, this is unmatched by any other kiln mouth and ceramic varieties.

It is also unique in the history of ceramics in the world, so people often use "one color into the kiln, all colors out of the kiln" to describe the art of kiln transformation of Jun porcelain.

The production of Jun porcelain generally needs to go through seven major processes. The first is the only way for all porcelain production, that is, the processing and selection of porcelain raw materials.

In the mining area, we search for raw materials with reliable performance and stable quality, which are suitable for kiln transformation of Jun porcelain, and carefully select them.

After choosing the right one, it is natural to carry out the necessary processing of the raw materials.

The next step is the most troublesome step, which is the aging of the porcelain clay.

Jun Porcelain is no exception. Proper porcelain clay is selected. After treatment, the porcelain clay is piled up in the open-air stockyard for a long-term, continuous cycle of wind, sun, rain, and freezing to make it weathered and crisp and improve its performance.

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The ore material needs to be crushed into a wheel mill for coarse crushing into sand or powder.

Some need shade, rain, dust and so on.

Only in this way will fine grinding be carried out.

In ancient times, this process was very important because there were no mechanical assistance.

Therefore, grinding has also become a very difficult process.

Only by putting all kinds of raw materials into the tool according to the proportion and turning them can the mud or glaze meet the quality requirements.

These are the processing of raw materials, and only after processing can a qualified porcelain be started.

With the raw materials, the shape design will be carried out first.

The traditional shapes of Jun porcelain are mainly vessels such as plates, bowls, bowls, stoves, and flowerpots, pursuing a dignified, simple and natural artistic style.

On the basis of inheriting the tradition, modern Jun porcelain has carried out bold reforms, added modern aesthetic elements, and created a new expression field of Jun porcelain art.

There are several categories of Jun porcelain shapes: traditional utensils, figures, animals, and special shapes.

Hundreds of modeling series and thousands of varieties have been formed, including utensil series, animal series, character series, stationery series, tea set series, bird series, practical product series, etc.

There are many kinds. If you want to make large quantities, the easiest way is to make models.

Of course, manual drawing does not require molds.

But modern mass production is absolutely inseparable from molds.

It is still a little technically difficult to turn the mold that has been made into a model.

The model material is clay used in ancient times, which is turned into a biscuit-fired mold, which can be used for stripping and forming.

In modern times, gypsum powder is generally used, and water is added to make a slurry to make it solidify and form a mold.

The plaster mold can be used for both grouting and stripping.

The similarity between bisque fired clay mold and plaster mold is that both have certain strength and water absorption, and can be used repeatedly.

The model is generally hollow, and the shape of its inner wall is the shape of the green body.

The forming of Jun porcelain mud tires must be done by hand drawing, but in modern times, according to the types of products and different needs, there are generally several methods for forming, such as grouting, casting, and stripping.

Grouting molding is to inject mud into the plaster model, pour out the excess mud after a certain thickness, and open the model in a few seconds to take out the formed green body.

The drawing forming is simpler, that is, put a ball of mud on the rotating wheel and pull it by hand to make various round blanks.

This is also one of the most important traditional molding methods for top porcelain.

As for the blank forming, it is also called the blank forming.

This method is to slap the mud material into mud flakes, which are compacted against the inner wall of the model and formed by butt jointing.

When taking off the large bottle, the mud must be rubbed into mud strips, placed in the model, and patted into a green body of appropriate thickness.

This process is repeated continuously, gradually expanding the green body, until finally the whole large bottle is taken off.

Of course, the most difficult must be freehand molding.

This refers to the method of molding by hand kneading, withering, etc., and is generally used for the production of small pieces or special-shaped utensils.

After forming, it is dried, sharpened, and finally glazed by biscuit firing.

A special Jun porcelain glaze will be made here, because different kilns have their own secret recipes for their glazes.

Only with the right glaze is the basis for firing all top porcelain.

With the basic glaze, it is biscuit firing.

The biscuit firing will fire the shaped body first without glaze.

The temperature is 900c ~ 950c, this is the first time to burn.

This is mainly to increase the strength and water absorption of the green body, which is beneficial to the glazing operation.

After the biscuit firing, it is out of the kiln, and the appropriate one is selected for glazing.

The plain body after biscuit firing is glazed by methods such as rinsing glaze, dipping glaze, pouring glaze, and brushing glaze.

Attach a layer of glaze slurry with a suitable thickness to the surface of the plain tire.

Only after completing this step, it is necessary to fire the porcelain at high temperature.

The glazed blank is put into the kiln for firing, that is, glaze firing.

The temperature is generally 1280c ~ 1300c.

Jun official kilns in the ancient Song Dynasty were fired with firewood. After the founding of New China, coal was used to restore the production of Jun porcelain.

After 1994, gas burning was widely used.

It wasn't until the firewood firing process was restored that the secret of making Jun firing in the Song Dynasty was only cracked.

Due to the influence of temperature, atmosphere and climate when Jun porcelain is fired, the fired products have colorful and ever-changing kiln effects.

The firing of Jun porcelain mainly includes gas firing, coal firing, firewood firing and carbon firing.

Of course, the porcelain fired in this way has a unique style.

After all, gas-fired, coal-fired, and firewood-fired styles are all different.

Finally, the finished Jun porcelain is out of the kiln. The fired Jun kiln porcelain is inspected and graded according to the Jun porcelain standard.