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1. Hun-casting copper carving casting process: Before Shang Dynasty, all copper carving casting processes were Hun-casting process, i.e. one-time casting. The method has three aspects: alloy, casting and standard making. (1) Alloys are made according to the needs of copper carvings, copper and tin in a certain proportion together, placed in a copper furnace heating and melting into bronze solution, can be used for casting. There are different kinds of bronzes with different alloy proportions, such as 80% copper and 20% tin in Goujian sword of Yue King. (2) Casting bronze Guangong, pouring bronze solution into the standard from the gate, cooling the copper solution, removing the inner and outer parts, then grinding and dressing, that is to complete. (3) Model making is pottery model making. Pre-made copper sculpture is to make a model of the same size as the copper sculpture to be cast with clay. The decorations and inscriptions should be carved on it at the same time, and then dried and baked to make it hard. Then the exterior model is turned into mud by mixing water with spinning yarn, soil and shredded plant stems, and then printed on the mud mould. After the mud is half-dry, the mud is cut into several pieces with a knife and then dried in shade and then baked hard, which becomes the www.hanbaiyushidiao.cnwww.shaiban.net.cnwww.shidiaodaxiang.cnwww.xiaoxieqi.com.cnwww.banjiacz.cn

www.datongbanjia.cnexterior model. The inner model is made of clay according to the shape of the clay mould minus the thickness of the wall. If there are inscriptions on the inner wall, the inscriptions need to be inscribed on the inner model surface. After drying and baking, the inner and outer fans are assembled together, tied and fixed with ropes, then wrapped with thick mud, leaving the gate for casting copper liquid and the passage for discharging air in the fan. At this time, the space between the inner and outer fans is the shape of the copper carving to be cast. 2. Shang Dynasty partition casting process decoration: that is to say, the copper carving body and accessories are cast separately, and the partition casting process is divided into the first casting method and the second casting method. 3. Loss of wax method and welding method 4. New decoration technologies such as wrong gold and silver, wrapped gold and silver, minced gold and engraved chips.