We are a leading global supplier of gum rosin. We offer both "ww grade" and "x grade" gum rosin is an ingredient in printing inks, photocopying and laser printing paper, varnishes, adhesives (glues), soap, paper sizing, soda, soldering fluxes, and sealing wax. gum rosin can be used as a glazing agent in medicines and chewing gum. It is denoted by e number e915. A related glycerol ester (e445)can be used as an emulsifier in soft drinks. In pharmaceuticals, rosin forms an ingredient in several plasters and ointments. in industry, gum rosin is a flux used in soldering. The lead-tin solder commonly used in electronics has about 1% rosin as a flux core helping the molten metal flow and making a better connection by reducing the refractory solid oxide layer formed at the surface back to metal. Gum rosin is frequently seen as the burnt or clear residue around new soldering.