Gum Rosin X, WW, WG, N, M, K Appearance: Light Yellow Crystal High quality, competitive price usage: paper, ... to the standard glass color piece of rosin. Softening Point (C) 76Acid Number (mg.KOH\g) 166Ash Content Percent by mass ... and 100 drumsAn Gum Rosin X, WW, WG, N, M, K