Polymerized Rosin Code: AJ Product index: accord with national industry standard ZB B72 008-89 Typical Properties Yellow-brown amorphous solid. It is composed of rosin monomer and dimer. It has more oxidation resistance, brightness and anti-crystallinity than rosin. Production process: Rosin is dissolved in 200 # solvent gasoline, after acid-catalyzed polymerization reaction, slag discharge, neutralization, water washing, clarification, and refined by distillation in a distillation tower.