45 degree slant concave carvig

Generally speaking, there are two kind of jade caving: the concave carving and convex carving. There are two type concave carving, the V incise curve or line, the  45 degree “/” slant type.西周玉器的刀工風格最大特色是單雙斜刀法, 有所謂45度大斜刀法, 此法至漢以後即失傳.