In the middle of the Northern Song Dynasty, CAI Xiang (a great calligrapher), an important official of the Song Dynasty who was in charge of the production of tribute tea in Fujian province, summarized the custom of tea fighting over the past decades and wrote an epoch-making work in the history of tea art, Tea Records (1054). In the book: "Tawny white, should be black. Jian 'an is made in a uproar, such as rabbit milli grain. Its billet micro thick, jiong long hot difficult cold, the most to use. Elsewhere, or thin or purple, as well. Its green and white lamps are not used by the trier." "Tea Records" fully affirmed the function and the unique position of the cup. After the publication of "Tea Records", the culture of fighting tea promoted its spread in the government and the countryside, and the excellent products in the construction of the cup became the treasures sought by the royal family and scholar-officials at great expense, and the great masters in the literary world expressed their admiration. From then on, Jianyao entered its heyday, and its scale of production expanded continuously. It also produced jianzhao, whose inscription on the bottom foot was "for imperial use" and "for entering", to pay tribute to the imperial court. The rare varieties of kiln are rabbit hao, crane pigeon spot (namely kiln oil droplet), obsidian (namely mildew). Rabbit milli caldron is the main product of kiln building. Its main feature is that the black glaze surface is distributed with rain-striped crystal pattern. Similar to rabbit fur fetus, it is iron-black with full glaze. Bai glaze applied outside does not come to the end, and du glaze in the lower abdomen flows vertically like tear marks. Open, sloping wall, ringed feet. The underside is unglazed, revealing a dark brown hard tire. Black glaze was applied to the inner and outer walls of the cup, and the glaze precipitated out with brown rabbit mildew pattern on the glaze, gradually changed to brown and black under the mouth, and became pure black near the heart. The e glaze has filamentous dark brown crystal like rabbit hair, commonly known as "rabbit millspot".
If a work of art is an artificial technological product with aesthetic value, we should pay attention to two basic problems when appreciating a lamp: first, what is the beauty of a lamp, and second, how difficult it is to make a lamp. Since the cup is only a tea bowl, the shape of the vessel is small and simple, so the technical difficulty in the shape of the vessel is not great. Built one of the main features of the lamp is black glaze surface with colorful stripes, these markings are naturally occurring in the kiln fire, to the aesthetic value of glaze markings, ceramic art of ancient and modern, Chinese and foreign people, trying to find the best porcelain making raw material and to explore the most accurate firing method, after decades or even the efforts of several generations, but few of outstanding works. Therefore, the art of building light is a combination of earth and fire with great difficulty, and is pure ceramic art! This is also where the value of jianzhan, artistic value, collection value are very great.
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