Gum rosin

It is a kind of nutural resin,mainly composed of various kinds of resin acids. Gum rosin performance characteristic: it is a kind of nutural resin,mainly composed of various kinds of resin acids,it can be dissolved easily in many organic solvents,and has special chemical activity. specification: grade x ww appearance transparent solid color slightly yellow pale yellow correspond to the standard glass color piece of rosin softening point(r&b), 76 75 acid numbermgkohg 166 165 alcohol insoluble substance, % 0.03 0.03 unsaponifiable matter, % 5 5 ash,