Gum rosin ww grade 1.Soft point 166-170 2.PACKAGE:225kg galvanized drum or 25kg bag 3.Origin: Guangxi China 4.Price: 2500usd Gum rosin for coatings WW Grade GUM ROSIN WW GRADEGUM ROSIN WW GRADE(ex Pinus Massoniana)Appearance:transparentColor(species standard);light yellowSoftening point(R and B,deg C);76.0 min.USAGEPaint,ink,rubber,paper,soap,Organic synthesis,etc.Acid value(mg/g);166 min. ...