... Rosin/Colophony/Natural Rosin/China Gum Rosin/Resin gum rosin has been general used for ink, adhesive, paint, food and rubber industry Name of ... 03%max0.04%maxAt present, most rosin product is used for the manufacturing of paper, paint, soap and printing ... the producing of synthetic rubber and printing ink, resin acid is changed into disproportionate rosin, polymerized rosin, hydrogenated rosin, etc for ...