Gum Rosin/Colophony/Natural Rosin/China Gum Rosin/Resin gum rosin has been general used for ink, adhesive, paint, ... oxidized, in the oil paint industry, the carboxylation reaction of resin acid is usually employed to produce resinate for further use ... . While in the producing of synthetic rubber and printing ink, resin acid is changed into disproportionate rosin, polymerized rosin, hydrogenated rosin ...