Jun porcelain was burned with wood in Song Dynasty, with coal in Jin and Yuan Dynasties, and with wood in Yuan Dynasty. In the Ming Dynasty, most Jun kilns stopped firing for various reasons. Until the end of the Qing Dynasty, Jun porcelain began to recover, and charcoal burning appeared. From the early 1950s to 1994, Jun porcelain was fired with coal. Jun porcelain 1994 was successfully fired with liquefied steam. In 2002, Jun porcelain was fired with natural gas, and gas combustion became the mainstream, but wood burning and coal burning never stopped. At present, there are three mainstream Jun porcelain products on the market: wood burning, coal burning and gas burning.
? Technological differences of burning wood, coal and gas in Jun porcelain;
Judging from the effect of kiln transformation, the glaze color of wood-fired Jun porcelain is natural, giving people a feeling of beauty, elegance, warmth and softness. Coal-fired products have a warm and lively artistic style, and the glaze is prone to the artistic effects of mountains and rivers and colorful clouds. Gas kiln products are generally bright and colorful, a bit frivolous.
Judging from the opening of Jun porcelain, there are many Jun porcelain pieces burned with coal, few with gas and few with wood.
From the performance of glaze painting, the glaze painting of wood burning has a strong three-dimensional sense, the glaze painting of coal burning is thicker, and the jade texture is more obvious, while the glaze painting of gas burning is flat. The pores of Jun porcelain burned by coal are larger, but those burned by wood are smaller.
? From the firing process, it can be seen that burning Jun porcelain with coal requires a large amount of labor, the products need to be saggers, the coal quality needs to be strictly checked, and the burning pool needs to be cleaned. Every time the kiln is burned, it needs to be loaded, paved and blocked, and the firing process needs to be supplemented, pried, leveled, blindfolded and reduced. This method is the most complicated and the yield is also low. Secondly, wood burning, because the flame of wood burning is long and the quality of wood is more intuitive.
? From the change of foot, the transition color often appears at the bottom of wood-burned works, in the glazed and unglazed parts, while the gas-burned Jun porcelain has no transition color.
Collection value:
The collection of Jun porcelain works of art, regardless of the firing method, first depends on the shape of the works and the effect of kiln transformation. On this basis, the cultural background of the work, the author's reputation, size and the difficulty of firing should be considered. Of course, burning wood and coal, as the traditional process of Jun porcelain firing, embodies the rich history and culture of Jun porcelain, and should also be one of the factors of collection.