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