Gum rosin 1.Flux material 2.Solder wire material 3.Solder ... , coatings, inks, rubber, soaps, electronic industrial products, food grade ester gum, rosin ester resins etc.3. Packing: (1) Drum: Galvanized iron ... ) Bag: Intertexture or kraft paper bag, 25kg net each bag. Gum rosin