The effect of rosin on the guzheng: In terms of musical instruments, rosin is applied to the bow hairs of string instruments such as erhu, violin, morinouqin, etc. to increase the friction between the bow hairs and the strings. Rosin refers to the non-volatile natural resin obtained through different processing methods using pine resin as raw material. Rosin is an important chemical raw material and is widely used in soap, paper, paint, rubber and other industries.

1. The unique fragrance in the pine forest.

2. Also known as pine paste, pine fat, and pine gum.

3. Refers to the substance after distillation of rosin. Solid, transparent, insoluble in water, soluble in alcohol, hard and brittle, light yellow or brown. It is an industrial raw material for manufacturing paint, soap, paper, matches, etc.

4. Rosin is an oil that flows out from the trunk of pine trees and is melted into water at high temperatures. After drying, it becomes a solid block (without a fixed melting point). Its color is burnt yellow and deep red. It is an important chemical raw material and is used daily. In daily life, it is mainly used as flux when welding circuit boards. For ballet learning, rosin plays an anti-slip role.