1. Wire cutting method: Take ponytail and horsehair rope as "saw blades", constantly add sand and water, pull the "saw blade" back and forth for friction sawing, and slowly cut the jade material into jade pieces with flat sides.
2. Mound cutting method: Mound is a tool for cutting jade articles by using simple mechanical principle to rotate. The specific method is to install a disc on the horizontal shaft, and then connect the belt wound on the shaft at one side of the disc to the pedal respectively. The jade craftsman treads on the pedal alternately with his feet, and the shaft rotates, and the rotating rotor simultaneously drives the disk named Tuo to rotate. At this time, as long as water, quartz sand and other sandy substances are added to the plate, jade can be rubbed. On the unearthed jade articles of Liangzhu culture, there are obvious concentric circles and deep cutting marks in the middle, and slightly thin lines at both ends. Experts believe that these should be traces of heavy processing. As for the texture of the wheel, it is probably hard rock without metal.
3. Slicing method: a method of grinding and cutting jade with stone chips or sawdust. This is inferred from the V-shaped cut on Liangzhu jade.
According to research data, ancient jade carvings were mainly used by human beings to drill holes.
Drill and pipe drill, but the hole diameter of the drill is small, and the pipe drill mostly uses bamboo and bone pipes. As a drill bit, it has a large aperture, and because it is made by hand, a spiral line will appear on the surface of the drill bit, which is also the main part that distinguishes ancient jade crafts from modern jade crafts.
Tool maps and more detailed LZ can go to Baidu Library, where there are maps.
Ancient Jade Articles in China (Ⅱ)
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