Ester Gum A Rosin ester Arakawa Chemical Natural Resins & Gum >> Rosin Inks Coatings Rosin ester ESTER GUM A Good compatibility with natural / synthetic rubbers, EVA Oil varnish, Enamel,Lacquer,Printing ink,Emulsion paint Rosin ester. Used in oil varnish, enamel, lacquer, printing ink and emulsion paint. Offers good compatibility with EVA and natural and synthetic rubber.