Gum Rosin is a natural solid form of pine oleoresin from pine trees, according to the specification, the range of colors from yellow to black, so it was also called colophony. It is used in foods, beverages, cosmetics, etc. to suspend oil in water. In the rubber industry, it is used to soften rubber and facilitate the dispersion of fillers in rubber. As an adhesive, it is used to manufacture rubber-based and resin-based adhesives. It is also used in the pulp and paper industry as a paper sizing agent to improve paper quality and strength. Rosin can also be used in paints to add smoothness to painted surfaces. It is also used as a carrier for inks and to improve adhesion to paper.