Abstract: A method of producing an ink-jet recording sheet containing the steps of: (a) coating a water-based coating composition A to form a layer on a non-absorptive support, the coating composition A containing a hydrophilic binder and inorganic microparticles having an average particle diameter of primary particles of not more than 30 nm, (b) drying the coated layer so as to form a porous ink absorptive layer, and (c) applying a water-based coating composition B on the porous ink absorptive layer across a direction perpendicular to a conveying direction of the non-absorptive support employing a slot nozzle spray device, the slot nozzle spray device having: (i) a coating nozzle for supplying the water-based coating composition B; and (ii) a gas nozzle for ejecting a gas to an aperture portion of the coating nozzle, wherein the water-based coating composition B has a dynamic surface tension of 20 to 55 mN/m.

Abstract: A method of producing an ink-jet recording sheet containing the steps of: (a) coating a water-based coating composition A to form a layer on a non-absorptive support, the coating composition A containing a hydrophilic binder and inorganic microparticles having an average particle diameter of primary particles of not more than 30 nm, (b) drying the coated layer so as to form a porous ink absorptive layer, and (c) applying a water-based coating composition B on the porous ink absorptive layer across a direction perpendicular to a conveying direction of the non-absorptive support employing a slot nozzle spray device, the slot nozzle spray device having: (i) a coating nozzle for supplying the water-based coating composition B; and (ii) a gas nozzle for ejecting a gas to an aperture portion of the coating nozzle, wherein the water-based coating composition B has a dynamic surface tension of 20 to 55 mN/m.

Abstract: The ink jet recording material having: a support; a porous layer containing a hydrophilic binder and articulates, formed onto a support; wherein a coating solution is provided onto the porous layer, the coating solution being adapted to make a property to a specific light different from a property of a lower structure.

Abstract: A coating apparatus comprising: a slot nozzle spraying apparatus provided with a pair of inner die blocks and outer die blocks at the outside of said pair of inner die blocks, having a coating solution nozzle formed between said pair of inner die blocks, and gas nozzles constituted between one inner die block and outer die block adjacent thereto, and between another inner die block and outer die block adjacent thereto, wherein, angle ? between the solution flow passage of said coating solution nozzle and the gas flow passage of one of said gas nozzle is 15-60 degree.