Fintac 5333 Polymerized rosin Finjetchemical Industries Natural Resins & Gum >> Rosin Inks Coatings Fintac5330 is made of gum rosin through a new technology of sulfuric acid and zinc chloride. Polymerized rosin is a modified products of gum rosin, contains abietic type acids. It has a series of exellent properties such as higher softening point, non-crystalline, good oxidation-resistance, higher viscosity in organic solvent. Mainly used in inks, paints and varnishes. Polymerized rosin made of gum rosin. Mainly used in inks, paints and varnishes. Possesses high softening point, non-crystalline, good oxidation-resistance properties and high viscosity in organic solvent.