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The color change of Jun kiln is directly caused by the reduction reaction of copper, while the indirect cause of lime alkali entering the glaze.

This is the root of Jun kiln porcelain, and it is also the reason why so many features appear.

Only by mastering this point can it be possible to make Jun kiln porcelain.

Of course, all these developments have a context to follow.

Although the Jun kiln was the most famous in the Song Dynasty, it actually existed in the Tang Dynasty. This is the famous Tang Jun.

The most famous kiln mouth that produces this kind of Tang Jun should be the Huangdao Kiln in Jiaxian County.

Tang Jun is a representative product of Huangdao Kiln, commonly known as "Tang Hua Porcelain" and "Tang Hua Glaze", and was called "Hua Weng" in Tang Dynasty.

The floral porcelain pots produced by Huangdao Kiln are decorated with sky blue or moon white spots on black glaze, yellow brown glaze and tea powder glaze.

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Therefore, it is particularly eye-catching, so that the Jun kiln craftsmanship, one of the five famous kilns in the Song Dynasty, can be regarded as a pioneer.

In addition to the flower porcelain and yellow glaze relics of the Tang Dynasty, there are white glaze green colored wares later, the white glaze is slightly yellowish, and the green color is emerald green.

The pentagonal or hexagonal exposed placenta, which was popular in the north of the Song Dynasty, was also fired at Huangdao Kiln in Jiaxian County, which is a decorative method formed for stacking firing.

In the Yuan Dynasty, Cizhou kiln-style white ground black flowers and Jun glaze wares were fired.

The four-series vase with white ground and black flowers is the same as the Pacun kiln in Yuzhou. The upper part is glazed with white, and the four characters "spring, summer, autumn and winter" are written in brown color, and the lower part is glazed with brown.

The characteristics of Jun porcelain in the Tang Dynasty can be roughly summed up by "thickness", which is represented by splashed spots on black glaze.

It is mainly black and white, with blue in black, white in blue, and blue and white.

And the glaze pattern has a sense of flow with the firing temperature.

In the end, it will show needle-point shape, thread shape, meteor shape, raindrop shape and so on.

It can be said to be unpredictable, allowing viewers to have a special and rich aesthetic experience.

This aesthetic achievement is very similar to the red and purple kiln mottled colors of Jun porcelain in the Song Dynasty.

Its basic craftsmanship is in the same line as Jun Kiln in Song Dynasty.

Therefore, it was included in the system of Jun porcelain, and it was called the "enlightenment period".

The shapes of Jun porcelain in the Huangdao Kiln in the Tang Dynasty are extremely rich, such as bowls, plates, pots, cylinders, bottles, furnaces, figures, animal ornaments, etc.

This shows that Tang Jun not only used utensils, but also developed into decoration and aesthetics.

In addition to firing white glaze, yellow glaze, and black glaze porcelain, since the Tang Dynasty, glazes of different metal oxides have also been used to successfully master the two-color glaze technology.

The products include black-glazed and blue-spotted wares, or green and blue-spotted colors on white glaze, forming the unique style of this kiln.

Especially since the late Tang Dynasty, Duandian Kiln in Lushan, Huangdao Kiln in Jiaxian County, Dayaodian Kiln in Neixiang and Zhaojiamen Kiln in Yuzhou have seen the "rain-like" kiln changes.

This created a precedent for Song Jun kiln transformation technology, so some people call this kind of kiln transformation spot "Tang Jun".

Jun porcelain has been burning for hundreds of years and has its unique craftsmanship and style. Jun porcelain's kiln transformation art is even more advanced and has a high reputation.

The successful firing of Jun porcelain copper red glaze is a great creation of the working people in ancient my country, and it has written a glorious chapter in the history of the development of ceramic arts and crafts in my country.

Using simple craft processing, it has achieved the artistic effect of giving people a sense of beauty.

The more eye-catching Huangdao Kiln in Jiaxian County has black-glazed and blue-spotted ware with blue-spotted white glaze, which has its own unique artistic style.

Its kiln transformation process may be to use the method of painting or stippling after dipping in glaze to aggravate the color.

After kiln transformation, it forms blocky mottled colors.

This kind of plaque has different shapes and changes, black with blue, or black glaze macula, just like golden light, unique style.

Porcelain blanks are first fired and slightly cooled, then glazed and fired, and the glaze layer is thicker.

During the firing process, it contains a large amount of calcium phosphate substances, the glaze layer breaks during firing, and the glaze boils and rolls.

The glaze boils due to the varying weights of the various elements

, the lighter weight rolls upwards.

At this time, relatively heavy elements such as copper and iron flow down, forming dark grooves in the glaze layer;

The kiln turns off slowly, and the glaze surface gradually stops boiling. After the height is filled, irregular flow lines often appear in the glaze layer, buckling and winding.

For example, "earth draws away mud", this feature is unique to Jun Kiln.

The bottom of the utensils is covered with glaze and then wiped off. After firing, it becomes brownish yellow.

Because the enamel of Jun porcelain is thick and opaque, engraving, scratching and printing should not be exposed, so Jun porcelain wins with glaze color.

Different from other porcelain glaze colors, it is full of creativity and unique style, opening up a new artistic realm in the beauty of ceramic glaze colors.

Especially copper red glaze, Jun Kiln produced the most.

Because the red color of Jun glaze is due to the coloring effect of reduced copper.

Red glaze contains 0.1-0.3% copper oxide and a certain amount of tin dioxide.

In sky blue, sky blue and moon white glazes, the content of copper oxide is extremely low, only 0.001-0.002%, which is similar to that in general white glazes.

The purple color of Jun glaze is the result of fusion of red glaze and blue glaze.

The purple spot of Jun porcelain is caused by intentionally coating a layer of copper red glaze on the blue glaze.

Jun kiln adopts two processes of biscuit firing and re-firing in firing.

When refiring, first use the oxidizing flame, and when the glaze melts, use the atmosphere of the reducing flame.

Due to the reduction of copper, it has a beautiful artistic effect.

It forms the colorful and colorful glaze of Jun porcelain, which complement each other.

There are many famous kiln-changing colors of Jun porcelain, such as rose purple, begonia red, eggplant skin purple, chicken blood red, grape purple, cinnabar red, green onion green, carmine red, parrot green, flame red and so on.

Other colors include sky blue, moon white, blue and beige.

The red in the glaze is purple, the purple is dark blue, the green is white, and the white is blue, which can be described as colorful and magnificent.

Jun porcelain glaze uses copper oxide as the colorant, and is fired into copper red glaze in a reducing atmosphere.

In this way, the fired glaze color is blue with red, like the sunset glow in the blue sky.

Jun kiln glaze colors are generally divided into two categories: blue and red. Specifically, it can show all the colors in the monthly average glaze.

Among them, blue is also different from ordinary celadon, which is a variety of blue opalescent glazes with different shades.

The lighter blue is called azure, the darker is called azure, and the lighter than azure is called moon white. They all have a blue luster like fluorescent light.

The glaze color of Jun porcelain has a kind of elegant blue opalescence like fluorescent light, and the beauty of its tone is beyond words.

There are two kinds of glaze colors, one is thin flat glaze and the other is orange peel glaze.

It is characterized by firing color glaze "kiln transformation".

The tire color of the product is darker, light gray or brownish purple, and the tire quality is hard;

The glaze is milky, and the glaze colors include sky blue, moon white, rose purple and begonia red;

The purple spot of the single candle on the utensils is almost gone, most of them are cyan glaze and red glaze, the rose purple that fuses with each other;

Due to the blending of glaze colors, countless kiln changes of different colors and shapes are produced.

This is another feature that makes Jun porcelain different from other celadon.

Therefore, the purple in Jun glaze is particularly eye-catching.

And these various purples are the result of the fusion of red glaze and blue glaze.

The purple spot of Jun glaze is caused by intentionally coating a layer of copper red glaze on the blue glaze.