... new Iron Drums of 225kgs net of each, Gum Rosin ww grade, resin Used in paper, ink, rubber, paints and varnish ... industry, the carboxylation reaction of resin acid is usually employed to produce resinate for further use7) In the producing ... synthetic rubber and printing ink, resin acid is changed into disproportionate rosin, polymerized rosin, hydrogenated rosin, for further use by its double bond ...