Abstract: An ink jet recording material of the invention includes a polyolefin resin-covered paper substrate, an ink absorption layer and a layer principally including colloidal silica in this order at one face of the substrate, and a backcoat layer at an opposite face of the substrate. An MD direction Taber stiffness of the substrate is at least 3 mN·m. The ink absorption layer principally includes fumed silica, and the backcoat layer is principally polyurethane resin. The ink absorption layer includes a thioether-based compound, and a polyolefin resin layer at a side of the substrate at which the ink absorption layer is to be provided includes an fluorescent brightening agent and a white pigment. A solid content coating amount of the colloidal silica is 0.05 to 0.3 g/m2, and a solid content coating amount of the polyurethane resin is 0.8 to 1.5 g/m2. A 20° glossiness of a blank portion of a face of the recording material that features the ink absorption layer is 40 to 60%.

Abstract: In an aspect, a first ink amount relating to the yellow ink is smaller than both a second ink amount relating to the cyan ink and a third ink amount relating to the magenta ink. In another aspect, a first total increase amount is larger than both a second total increase amount and a third total increase amount. The first total increase amount is a total increase amount of inks other than the yellow ink relating to a black yellow gradation. The second total increase amount is a total increase amount of inks other than the cyan ink relating to a black cyan gradation. The third total increase amount is a total increase amount of inks other than the magenta ink relating to a black magenta gradation. In another aspect, a first lowest brightness is lower than both a second lowest brightness and a third lowest brightness. The first lowest brightness is lowest brightness of color to be printed without using black ink on a black yellow gradation.

Abstract: An ink jet recording material of the invention includes a polyolefin resin-covered paper substrate, an ink absorption layer and a layer principally including colloidal silica in this order at one face of the substrate, and a backcoat layer at an opposite face of the substrate. An MD direction Taber stiffness of the substrate is at least 3 mN-m. The ink absorption layer principally includes fumed silica, and the backcoat layer is principally polyurethane resin. The ink absorption layer includes a thioether-based compound, and a polyolefin resin layer at a side of the substrate at which the ink absorption layer is to be provided includes an fluorescent brightening agent and a white pigment. A solid content coating amount of the colloidal silica is 0.05 to 0.3 g/m2, and a solid content coating amount of the polyurethane resin is 0.8 to 1.5 g/m2. A 20° glossiness of a blank portion of a face of the recording material that features the ink absorption layer is 40 to 60%.

Abstract: The present invention provides a recording paper comprising: a resin-coated paper comprising a base paper at least one surface of which is coated with a resin; and an ink-receiving layer provided on the resin-coated paper, and being printable by an ink-jet printer, wherein the recording paper has a thickness of 280 ?m or more and a stiffness defined by JIS-P8125 of 2.8 to 4.0 mN·m, and gives a decreasing rate in friction coefficient of a paper-contacting surface of a paper-feeding roller of an ink-jet printer between before and after friction of the paper-contacting surface with the ink-receiving layer plural times of 5% or less.