What are the traditional manual processing techniques of stone carving?

Divide three-dimensional stone carvings according to the different shapes of carvings. Including stereoscopic portraits, animal statues, fireplaces, carved stigmas, etc. Plane stone carving. Including relief, picture frame, picture frame, engraving, lettering plaque, stone carving, shadow carving, line carving, etc. Handcarved works are divided according to the different processing tools used. That is, products carved with hand tools such as chisel, hammer and brazing. Semi-mechanized processing of sculpture. That is, some stone carvings are processed by hand, and some are processed mechanically. Fully automatic NC machining of carving. Sand blasting sculpture. Use a sand blasting engraving machine for engraving. The sandblasting engraving machine uses an air machine (air pressure 5-6kg/ m2) and emery to spray on the product engraving. Chemical corrosion sculpture. That is, the chemical reaction between chemical etching solution and stone is used to carve stone. There are two kinds of convex carving (relief) and concave carving.