... WW grade. Packed in new Iron Drums of 225kgs net of each, Gum Rosin ww grade, resin Used in paper, ink, rubber, ... and oxidized6) 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 ...