... Sample 5. Competitive price Product Name: Gum Rosin WW GradeType:Synthetic Fibers, Synthetic Resin and Pla...Grade:X, WW, WG, N, M, ... 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 ...