. Refers to the resindistillationThe substance after. Solid, transparent, insoluble in water, soluble in alcohol, hard and crisp, light yellow or brown. It is the industrial raw material for making paint, soap, paper, match and so on.

Rosin is the oil from the inner part of the pine tree, melted into water at high temperature, and becomes a lump solid after drying (no fixed melting point). Its color is burnt yellow and deep red, and it is an important chemical raw materialerhu,bass,Mongol stringed instrumentThe bow hairs of an equal string are used to increase the friction of the bow hairs on the strings.