Industrial field**: In the papermaking industry, rosin can be used as a sizing agent for paper to improve the water resistance and strength of paper; in the coating industry, it is used as a raw material for the production of coatings to improve the adhesion and gloss of coatings; it is an important raw material in the ink industry, which helps to improve the fluidity, dryness and gloss of inks; in the rubber industry, it can be used as a softener and tackifier to improve the flexibility and viscosity of rubber. - **Electronic and electrical field**: Rosin and its derivatives have good insulation properties and can be used to manufacture insulating materials, insulating layers of wires and cables, etc.; in the welding process of electronic components, rosin is often used as a flux to remove oxides on the metal surface and improve welding quality. - **Medical field**: It has the effects of drying dampness and dispelling wind, promoting muscle growth and relieving pain, and killing insects. It can be used to treat rheumatic arthralgia, scrofula, carbuncle, scabies, eczema, and bleeding from wounds. - **Other fields**: In the manufacture of musical instruments, rosin is used to apply to the bow hair of bowed string instruments to increase the friction between the bow hair and the strings, making the strings vibrate and make sounds; it can also be used to make spices, food additives, adhesives, detergents, etc.