Abstract: An ink jet recording medium for pigment ink, comprising a support and, superimposed thereon, at least one ink receptive layer, characterized in that at least one of the at least one ink receptive layer is a layer composed of particles of a copolymer of 80° C. or higher glass transition temperature prepared from styrene and/or methyl methacrylate (A) and another copolymerizable monomer (B), the particles having a weight average particle diameter of 50 to 500 nm. This ink jet recording medium for pigment ink is excellent in yellowing resistance, ink absorptivity, color density and water resistance and has glossy surface.

Abstract: An ink jet recording medium comprising a support and, on the support, at least one layer comprising cationic organic particles which have a glass transition temperature of from 70 to 130° C. and comprise (A) 0.1 to 10% by weight of a monomer having a hindered amine type functional group, (B) 0.1 to 10% by weight of a monomer having a benzotriazole type functional group and (C) 80 to 99.8% by weight of a monomer selected from styrene and acrylic monomers.