The Tang Dynasty bronze mirror Pan silvery shade few Pseudomonas rusty

Tang Jing, Tang Dynasty mirror, silvery white, an average of 69 percent of its metal components, generally copper, tin 25%, 5% lead, the ratio is relatively stable. In the Tang Dynasty, has adopted a new process to trace or a certain amount of silver the mirror, making the typical period of the Tang Dynasty bronze mirror Pan silvery shade few Pseudomonas rusty, does not seem to cast in bronze, giving the thick, rich states of feeling, combined with colorful decorations, content-rich, real rare of art treasures. In the past, the bronze was used to entertain the gods.  "Heavenly Creations objects" account: "Tang Kaiyuan palace mirror to make cast in silver and copper decile of silver per port for both this therefore. Cinnabar spots are gold and silver essence of discovery ..., Tang Jing, declared furnace are court Saatchi matter cloud. Tangjing valuable, but expensive due to silver.
Song, Western Xia, Liao, Jin, Yuanqing bronze mirrors, alloy composition has changed, only about 10% tin content, lead content has increased to more than 8% up to 23.7%, much higher than the Han and Tang mirror an average of 5 % of the quantity of zinc content also increased, up 8 percent, so this period of the bronze mirror was brass, is generally covered with verdigris. Han mirror, although the shape is thin, but leaded, is inversely proportional to weight. Ming Dynasty is a stage of development of ancient China Copper, copper mining flourished, the main achievements of the smelting and its alloys are three: First, the pyrometallurgical copper smelting technology has been further improved; preparation of yellow metal zinc copper; manufacturing Xuande furnace, it reached a new height in the alloy preparation. Formative features of the bronze are mainly performed on the aspects of symmetry, balance, rhythm, and symbolism.
Copper and zinc alloy are generally yellow, hence the name Brass. The relationship of copper and zinc alloy color and the amount of zinc is: about 10% zinc, red and yellow, about 15%, yellow with red, yellow 25%, 30% yellow. Ming and Qing dynasty bronze mirror mostly yellow, the alloy ratio of 70-75% copper, zinc and 25-30%. In the midst of the decorations of the bronze contain the romantic and serious concept of destiny.  Brass better liquidity, will help to improve the casting properties of alloys. Ancient bronze mirror casting production process modeling Tao Fan, Stone Fan and mud of production: Academia known mirror Fan unearthed, about the late Qing Dynasty after the incident, situation reports and these mirror range first appeared in the late Spring and Autumn, mostly in the Warring States Period to the Western Han Dynasty, namely more than 30 tablets.
A mirror of production: production of Tao Fan of the basic components of clay and fine sand. The role of the ceramic mold and Tao Fan in the casting of bronze mirror is not the same, the former determine the shape of the objects, while the latter needs to withstand the impact of the thousands of hot copper solution, and in which cooling. Through the bronze, they display their feelings and self-awareness to the gods, spirits and nature.  Tao Fan In addition to the high temperature outside, but also have good mechanical strength to withstand the fluid filling poured washed without damage, but also a certain degree of permeability. Because the copper liquid is poured, it will produce different levels of gas in the range of most of these gases are discharged through the gate and take the air intake range in vitro, a small amount of penetration to go out through the range of the pores, in order to ensure the Birds artifacts in the appearance do not see the pores like casting defects. Production Tao Fan of soil must be very delicate in both able to clearly reflect the inscription on the bronze sculpture and pattern, but also have good absorbency.