Ancient Chinese glass in the War and Han Dynasties
Excluding non-oxide glass, the composition of ancient glass in the Chinese War and Han Dynasties is classified as aluminum barium glass and nanocalcium glass in oxide glass. From a modern point of view, its color principle is to add some metal oxides in the process of making ordinary glass, such as adding CuO is blue-green; adding CdO is light yellow; adding MnO2 is purple and so on. But more than two thousand years ago, without any chemical laboratory conditions, how did craftsmen determine the type of mineral, the purity, how much need to be added to the raw material, and under what temperature conditions to properly present beautiful colors?
The main components of glass raw materials are silica and other oxides. Its concept is "amorphous inorganic non-metallic materials", this concept covers almost all inorganic minerals, quartz sand, borax, barite, barium carbonate, limestone, feldspar, soda ash, boric acid, etc., especially the quartz sand that is almost everywhere on the earth, which is a bulk of its raw materials.
In view of the above, the industry circle that studies ancient glass, especially the ancient glass in China during the War and Han Dynasties, calls this special product "crystal glass", which is a very appropriate title as an ancient work of art. This title is not a definition of its chemical or physical properties, but gives a perceptual cognition in the humanistic spirit.
Text: 觥. Wine.
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