... . Packed in new Iron Drums of 225kgs net of each, Gum Rosin ww grade, resin Used in paper, ink, rubber, paints ... synthetic resins.Features:1) China original gum rosin WW grade2) Natural organic compound, mainly composed of resins3) Possesses chemical activity when dissolved ... and varnish, various adhesives, glue, soap, synthetic resins, chewing gum and other chemical industries WW Grade Gum Rosin