Gum Rosin is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene  is dissolved easily in many organic solvents. and hs special chemical activity. it also was an important raw material for the production of paper, coatings. inks, rubber, soaps, electronic industrial products, food grade ester gum, and rosin ester resins