Water soluble resin means that the resin polymer is capable of dissolving in water; and the includes both a water soluble resin and a water dispersible resin (or emulsion), the polymer is dispersed in the water phase in the form of an emulsion, Not swelling. Water soluble resin can not do too much in general content, polymer swells very much, high content of the viscosity will be great, but the emulsion content can be done a little higher, because the polymer is in the form of polymer particles or aggregated form, Viscosity will not be great. In general, the aqueous resin comprises a water soluble resin.