Gum Rosin

Gum rosin is a kind of natural resin, mainly composed of various kinds of resin acids, it can be dissolved easily in many organic solvents, and has special chemical activity. So it is an important raw material for the production of paper, coatings, inks, rubber, soaps, electronic industrial products, food grade ester gum, rosin ester resins etc. 


Grade X WWW WG N M K
Appearance Transparent Solid
Color slightly yellow pale yellow yellow deep yellow yellow brown yellow red
Correspond to the Standard Glass Color Piece of Rosin
Softening Point
(R&B),°C, min
76 75 74
Acid Value,
(mgKOH/g), min
166 165 164
Alcohol insoluble
Substance ,(%) , max
0.03 0.03 0.04
matter, (%) ,max
5 5 6
Ash, (%) ,max 0.02 0.03 0.04

Forms and Packaging :
(1) Drum: Galvanized iron drum, 225kgs net each drum. 
(2) Kraft paper bag or plastic intertexture bag, 25kgs net each bag 

The above technical specification is the national standard of People's Republic of China.