Abstract: Ink jet recording sheet has excellent coloring properties for dye ink as well as pigment ink, a high degree of brightness, and excellent preservability for white paper portions. The ink jet recording sheet includes: a paper supporting medium made by machining pulp; an undercoating layer including at least a pigment and an adhesive; and an ink receiving layer including at least a pigment and an adhesive, the undercoating layer and the ink receiving layer being disposed on at least one surface of the paper supporting medium, and the ink receiving layer being located outermost thereof, wherein the undercoating layer includes titanium dioxide as the pigment and at least one emulsion type adhesive selected from acryl polymers, ethylene-vinyl acetate copolymers, or vinyl acetate polymers; and the ink receiving layer includes silica having an average secondary particle size of 3 to 11 ?m as the pigment, and a cationic ink fixing agent.

Abstract: Ink jet recording sheet has excellent recording properties and print preservability (especially, print light resistance and ozone resistance) for dye ink as well as pigment ink. The ink jet recording sheet includes: a supporting medium; and an ink receiving layer disposed on the supporting medium, the ink receiving layer including pigment, at least a styrene-acryl copolymer resin as an adhesive, and a guanidine compound and a secondary ammonium salt compound as a cationic polymer.

Abstract: An ink jet recording material having excellent gloss and capable of recording thereon clear ink images having a high color density includes a multi-layered ink fixing layer, formed on a substrate material and composed of an outermost ink fixing layer, and one or more intermediate ink fixing layers superposed on each other, and each includes a binder and a pigment selected from silica, aluminosilicate, alumina and zeolite, the pigment in each ink fixing layer being in the form of fine secondary particles having an average secondary particles size of 1 &mgr;m or less and each secondary particle is composed of a plurality of primary particles agglomerated with each other, and the outermost ink fixing layer being one formed by a cast-coating procedure using a specular casting surface.

Abstract: An ink jet recording sheet having a high gloss and ink absorbing property and capable of recording clear ink images having a high and uniform color density, includes a cast-coated ink-receiving layer formed on a substrate sheet and containing fine silica particles with an average primary particle size of 3 to 40 nm and an average secondary particle size of 10 to 400 nm and a binder.