... new Iron Drums of 225kgs net of each, Gum Rosin ww grade, resin Used in paper, ink, rubber, paints and varnish ... , various adhesives, glue, soap, synthetic resins.Features:1) China original gum rosin ... synthetic rubber and printing ink, resin acid is changed into disproportionate rosin, polymerized rosin, hydrogenated rosin, for further use by its ...