Chapter 1607: Jun porcelain is unmatched, kiln transformation is unparalleled
Traditional Jun porcelain is magnificent and colorful, and the glaze colors are not simple. It is even different from the previous single-color glaze porcelain.
The emergence of Jun kiln porcelain gave rise to rose purple, crabapple red, eggplant skin purple, chicken blood red, grape purple, cinnabar red, verdant green...
The glaze is red inside and purple inside, purple inside is dark blue, blue inside is white, and white inside is bluish. It can be described as a riot of colors.
In addition, the enamel is opalescent and crystal clear, thick and jade-like, similar to jade and agate, which gives Jun kiln porcelain an ingenious beauty.
So, how is such beautiful Jun kiln porcelain fired?
The firing temperature of Jun kiln is no longer low temperature, so it is not low-temperature glazed porcelain.
The firing temperature of Jun kiln has reached between 1350c-1380c.
It inherits the characteristics of traditional Jun kiln's exquisite texture and brilliant glaze color, and combines it with modern aesthetics, making the vessel full and exquisite in shape.
The uniquely developed agate glaze forms a more distinct layering after firing, with more than ten kinds of colorful glaze colors.
The whole body is also covered with pearl dots, rabbit silk patterns, caviar patterns and twists and turns of earthworm mud patterns, etc. The vivid and beautiful flowing patterns give people unlimited room for imagination.
In fact, if we study such exquisite porcelain carefully, we can see clues from the documents of past dynasties.
For example, "Yuzhou Chronicles" recorded during the Daoguang period of the Qing Dynasty: "Sixty miles southwest of the state (i.e. Yuzhou), there is a town called 'Shenhe' in the chaotic mountains. There is soil, and the pottery can be used as magnet."
Kiln transformation is a major feature of Jun porcelain.
Lan Pu's "jdz Tao Lu" of the Qing Dynasty praised: "There are two types of kiln transformation tools, one is made by heaven, and the other is made by man's ingenuity. The one is made by heaven, the nature of fire is transformed, and it is made naturally... It is made by man.
Skillful work is the key to craftsmanship, so it is used to create phantom colors and physical forms called kiln changes."
Earthworms lead away mud patterns, which is another major feature of Jun kiln and is also recorded in ancient books.
Zhang Yingwen of the Ming Dynasty wrote "Secret Collection of the Qing Dynasty" "In Junzhou kilns, the ones that are as red as rouge are the best, the ones that are as green as green, and the ones that are as purple as ink are the second best. The ones with pure color and one or two numbers on the bottom are better, and the ones with mixed colors are useless.
, the uniform glaze is uniform regardless of its depth or thickness. The thick glaze of Yuan porcelain sometimes has stripes, and sometimes there are still water waves in shallow areas."
Xu Zhiheng's "Yin Liu Zhai Shuo Porcelain" of the Republic of China "The Jun is evenly made and has been used for a long time. The body is thin and firm in nature. Its body is slightly heavier. The glaze has five colors, thick and rich, with rabbit silk text. The red one is as red as rouge and cinnabar is the most beautiful.
, those as green as verdant and as purple as ink are the second best.
The glaze is divided into two types: one is fine flat glaze, and the other is orange peel glaze. Orange peel glaze is also a latecomer, so most of them have purple spots. The unglazed parts are mutton liver color or sesame color, which are genuine glazes.
Things.
The glaze of Yuan porcelain is thick and uniform, the glaze of Yuan porcelain is thick and hanging, the glaze of Yuan porcelain is all fine, the glaze of Yuan porcelain is thick, the glaze of Yuan porcelain is mixed and uniform regardless of the depth, and the thick glaze of Yuan porcelain sometimes has lines.
Sometimes you can still see waves in shallow places.
The glaze of Jun kiln is very flat, but if there are rough lines hanging down straight down, they are called tear marks, and if they are bent and broken, they are called earthworm mud marks, which are the characteristics of Jun kiln."
Liu Zifen's "Zhuyuan Pottery Theory" of the Republic of China states: "Ancient porcelain does not pay much attention to color painting. All the vessels are solid colors. People in the shops call them one-glaze. In fact, for noble products, one-glaze is regarded as quaint and elegant, and blue and white are more meaningful than five colors."
The trend of the world is gradually declining, and colored porcelain has been popular for a long time. Unexpectedly, the ancient meaning has been lost, and its value has been low. People in the Tang and Song Dynasties favored green, while Ming and Qing favored red. Recently, Western merchants have emphasized purple. A Jun kiln purple ware is worth ten thousand gold, which is worthy of the ancients.
Is it right?
Although he also said that it was used. In the Song Dynasty, purple was like a ripe grape, extremely rich, uniform and uniform, and all the utensils were pure color. Yuan porcelain only had a few pieces of purple glaze sandwiched between celadon glaze. Ancient kilns
Porcelain, the glaze juice is moist, and the glaze of the kiln is like grease."
Jun kiln porcelain is extremely precious, and there are many folk sayings about this.
For example, "Even if you have a huge fortune, it is not as good as a piece of Jun porcelain."
"The Jun porcelain is unmatched, the kiln transformation is unparalleled"!
"One color when entering the kiln, and many colors when coming out of the kiln"!
"If Jun porcelain is red, it will be priceless; if Jun is not red, it will be poor for the rest of its life" and so on.
As for the commercial value of Jun porcelain, local folk proverbs say: "Enter the Southwest Mountain, a seven-mile long street appears, with seventy-seven kilns, fireworks cover the sky, and merchants travel all over the world, making money every day."
The formation of Jun porcelain has its complicated process.
The basic glaze color of Jun porcelain is various shades of blue opalescent glaze.
It is as light as azure, as deep as sky blue, and the one that is lighter than azure is moon white, and it has an elegant blue luster like glistening light.
The beauty of its color is unmatched by other products at the kiln entrance.
The characteristics of the chemical composition of Jun glaze are: low aluminum oxide content, high silicon oxide content, and 0.5 to 0.95% phosphorus pentoxide.
In the early days of Song Jun, the ratio of silica to aluminum oxide was between 11 and 11.4, with phosphorus pentoxide accounting for the majority of 0.8%.
The ratio of silica to aluminum oxide in Guanjun glaze is about 12.5, and the ratio of phosphorus pentoxide is between 0.5 and 0.6%.
Kiln-changing glaze is a typical two-liquid phase, phase-separated glaze.
The glaze has low aluminum oxide content, high silicon oxide content, and very little phosphorus oxide.
The red color in the glaze is due to the color rendering effect of reduced copper.
Due to the use of a reducing atmosphere, the content of iron oxide is reduced, and the fired glaze color is mainly blue opalescent glaze with varying shades, and a variety of kiln-changing glaze colors appear intricately concealed.
Kiln-varnished glaze is an artistic glaze with the most changes, the richest colors, and the most complex shapes.
Its initial appearance was entirely accidental.
People make certain glazes according to certain formulas, and after they are applied to the products and baked in the kiln, they produce unexpected colors and shapes.
The base color of Jun kiln's glaze is cyan, and occasionally dark or light red or purple appears in the cyan.
And this kind of purple sometimes looks like thousands of rays of rays of light bursting out from behind the clouds, and sometimes looks like colorful clouds floating in the clear sky. It changes endlessly.
People couldn't explain this phenomenon, so they called it kiln change.
In long-term practice, porcelain workers gradually understood and mastered the art of copper-red coloring.
The porcelain workers of Jun kiln were the first to use copper-red technology, which shows that they were able to fully master the reduction technology of copper elements at that time, which was a major achievement in the history of porcelain art.
It can be said that Jun kiln not only pioneered the use of variable glaze porcelain in my country, but also the molding of Jun kiln objects and superb kiln firing technology have always been admired by later generations.
It is important to note here that Jun kiln porcelain is the most special type of celadon that appeared during the Northern Song Dynasty.
Its predecessor is obviously the Tanglushan kiln flower-glazed porcelain.
The particularity of Jun kiln kiln transformation is not only the colorful red color that appears when copper is reduced from 2 valence to 0 valence under a strong reducing flame, but the special glaze structure also affects its color development.
Generally speaking, the biggest difference between Jun kiln glaze and other kiln mouth celadon is that its glaze crystal structure shows a certain fiber shape.
If you use a magnifying glass to observe the glaze of Jun kiln porcelain, it is not difficult to find that this fibrous structure is mainly the color-producing part.
There are large bubbles between the fibrous crystals and the glassy homogeneous crystals (that is, the non-colorful parts).
Many of these bubbles break through the glaze, causing the Jun kiln porcelain glaze to appear like orange peel and brown eyes.
This obviously helps the scattering of light on the glaze surface, making the color changes in Jun kiln richer.
This is usually due to the addition of lime alkali.