Printing coated paper and method for producing a printed material using the same

Abstract

Provided is a printing coated paper which is advantageous not only in that the coated paper has offset printability and causes no mottling in the printed area even in ink jet printing, but also in that the coated paper exhibits excellent rubbing resistance with respect to the printed area and excellent print density of a dye ink. The task of the present invention is achieved by a printing coated paper having a coating layer comprised mainly of a pigment and a binder formed on at least one side of a base paper, wherein the base paper is a treated base paper which has been subjected to size press using a treatment solution containing at least one member selected from a cationic resin and a water-soluble multivalent cation salt, wherein the total applied amount per each side of the at least one member selected from a cationic resin and a water-soluble multivalent cation salt, in terms of the solids content, is in the range of from 0.1 to 5.0 g/m.sup.2, and wherein the at least one pigment in the coating layer is ground calcium carbonate having an average particle diameter of 0.1 to 0.28 μm, wherein the amount of the ground calcium carbonate having an average particle diameter of 0.1 to 0.28 μm contained in the coating layer is in the range of 60 parts by mass or more, relative to 100 parts by mass of the total of the pigment(s) in the coating layer.

Claims

1. A printing coated paper comprising a base paper and a coating layer, wherein the coating layer is formed on at least one side of the base paper, and consists essentially of a pigment and a binder, wherein the base paper is a treated base paper to which a treatment solution containing at least one member selected from a cationic resin and a water-soluble multivalent cation salt has been applied by size press, wherein the total applied amount of the at least one member selected from a cationic resin and a water-soluble multivalent cation salt per each side of the base paper, in terms of the solids content, is in the range of from 0.1 to 5.0 g/m.sup.2, and wherein at least one of the pigment in the coating layer is ground calcium carbonate treated with an organic dispersant and having an average particle diameter based on volume of 0.1 to 0.28 μm, wherein the amount of the ground calcium carbonate having an average particle diameter based on volume of 0.1 to 0.28 μm contained in the coating layer is in the range of 60 parts by mass or more, relative to 100 parts by mass of the total of the pigment(s) in the coating layer.

2. A printing coated paper comprising a base paper and a coating layer, wherein the coating layer is formed on at least one side of the base paper, and consists essentially of a pigment and a binder, wherein the base paper is a treated base paper to which a treatment solution containing calcium nitrate that has been applied by size press, wherein the total applied amount of calcium nitrate per each side of the base paper, in terms of the solids content, is in the range of from 0.1 to 5.0 g/m.sup.2, and wherein at least one of the pigment in the coating layer is ground calcium carbonate treated with an organic dispersant and having an average particle diameter based on volume of 0.1 to 0.28 μm, wherein the amount of the ground calcium carbonate having an average particle diameter based on volume of 0.1 to 0.28 μm contained in the coating layer is in the range of 60 parts by mass or more, relative to 100 parts by mass of the total of the pigment(s) in the coating layer.

Description

EXAMPLES

(1) Hereinbelow, the present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the scope of the present invention. In the following Examples, “part(s)” and “%” indicate part(s) by mass and % by mass, respectively, in terms of the dry solids content or the substantial components unless otherwise specified. Further, the amount of the application using a size press apparatus and the coating weight of the coating composition for coating layer are indicated in terms of the dry solids content.

(2) (Preparation of a Treated Base Paper)

(3) <Treated Base Paper 1>

(4) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and a dimethylamine-epichlorohydrin condensation product (Jetfix 36N, manufactured by Satoda Chemical Industrial Co., Ltd.) in an amount of 3.0 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 1 having a basis weight of 100 g/m.sup.2.

(5) <Treated Base Paper 2>

(6) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and a dimethylamine-epichlorohydrin condensation product (Jetfix 36N, manufactured by Satoda Chemical Industrial Co., Ltd.) in an amount of 0.1 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 2 having a basis weight of 100 g/m.sup.2.

(7) <Treated Base Paper 3>

(8) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and a dimethylamine-epichlorohydrin condensation product (Jetfix 36N, manufactured by Satoda Chemical Industrial Co., Ltd.) in an amount of 5.0 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 3 having a basis weight of 100 g/m.sup.2.

(9) <Treated Base Paper 4>

(10) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and a dimethylamine-epichlorohydrin condensation product (Jetfix 36N, manufactured by Satoda Chemical Industrial Co., Ltd.) in an amount of 0.05 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 4 having a basis weight of 100 g/m.sup.2.

(11) <Treated Base Paper 5>

(12) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and a dimethylamine-epichlorohydrin condensation product (Jetfix 36N, manufactured by Satoda Chemical Industrial Co., Ltd.) in an amount of 5.5 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 5 having a basis weight of 100 g/m.sup.2.

(13) <Treated Base Paper 6>

(14) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and calcium nitrate in an amount of 3.0 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 6 having a basis weight of 100 g/m.sup.2.

(15) <Treated Base Paper 7>

(16) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and calcium nitrate in an amount of 0.1 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 7 having a basis weight of 100 g/m.sup.2.

(17) <Treated Base Paper 8>

(18) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and calcium nitrate in an amount of 5.0 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 8 having a basis weight of 100 g/m.sup.2.

(19) <Treated Base Paper 9>

(20) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and calcium nitrate in an amount of 0.05 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 9 having a basis weight of 100 g/m.sup.2.

(21) <Treated Base Paper 10>

(22) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and calcium nitrate in an amount of 5.5 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 10 having a basis weight of 100 g/m.sup.2.

(23) <Treated Base Paper 11>

(24) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and sodium chloride in an amount of 3.0 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 11 having a basis weight of 100 g/m.sup.2.

(25) <Treated Base Paper 12>

(26) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper were applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side and an anionic acrylic resin (VONCOAT AN-680, manufactured by DIC Corporation) in an amount of 3.0 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 12 having a basis weight of 100 g/m.sup.2.

(27) <Treated Base Paper 13>

(28) To a pulp slurry comprising 100 parts of LBKP having a freeness of 400 ml csf were added 12 parts of precipitated calcium carbonate as a filler, 0.8 part of amphoteric starch, 0.8 part of aluminum sulfate, and 1.0 part of an alkyl ketene dimer sizing agent (Sizepine K903, manufactured by Arakawa Chemical Industries, Ltd.), and the resultant slurry was subjected to paper making using a fourdrinier paper machine, and to the resultant paper was applied starch phosphate in an amount of 3.0 g/m.sup.2 per each side using a size press apparatus, followed by machine calendering treatment, to prepare treated base paper 13 having a basis weight of 100 g/m.sup.2.

(29) (Preparation of Ground Calcium Carbonate)

(30) <Ground Calcium Carbonate 1>

(31) Using a jaw crusher, a hammer crusher, and a roller mill, natural limestone was granulated so that the resultant particles had an average particle diameter of about 30 μm, and to the resultant particles were added water, and a commercially available polyacrylic acid dispersant in an amount of 1.5 part by mass in terms of the solids content, relative to 100 parts by mass of the ground calcium carbonate, and the resultant mixture was stirred to obtain an about 75% pre-dispersed slurry. The pre-dispersed slurry was treated using a wet milling machine, manufactured by Ashizawa Finetech Ltd. (horizontal, cylindrical milling chamber having a size of: diameter: about 0.5 m; length: about 1.3 m). Conditions for the treatment were such that beads made of zirconia having a diameter of about 0.2 mm were used, the packing ratio was 83% by volume, the flow rate was about 15 liter/minute, and the pass frequency was 16. The obtained ground calcium carbonate had an average particle diameter of 0.20 μm. Further, the slurry concentration was 55%.

(32) <Ground Calcium Carbonate 2>

(33) Using a jaw crusher, a hammer crusher, and a roller mill, natural limestone was granulated so that the resultant particles had an average particle diameter of about 30 μm, and to the resultant particles were added water, and a commercially available polyacrylic acid dispersant in an amount of 1.5 part by mass in terms of the solids content, relative to 100 parts by mass of the ground calcium carbonate, and the resultant mixture was stirred to obtain an about 75% pre-dispersed slurry. The pre-dispersed slurry was treated using a wet milling machine, manufactured by Ashizawa Finetech Ltd. (horizontal, cylindrical milling chamber having a size of: diameter: about 0.5 m; length: about 1.3 m). Conditions for the treatment were such that beads made of zirconia having a diameter of about 0.2 mm were used, the packing ratio was 83% by volume, the flow rate was about 15 liter/minute, and the pass frequency was 24. The obtained ground calcium carbonate had an average particle diameter of 0.12 μm. Further, the slurry concentration was 52%.

(34) <Ground Calcium Carbonate 3>

(35) Using a jaw crusher, a hammer crusher, and a roller mill, natural limestone was granulated so that the resultant particles had an average particle diameter of about 30 μm, and to the resultant particles were added water, and a commercially available polyacrylic acid dispersant in an amount of 1.5 part by mass in terms of the solids content, relative to 100 parts by mass of the ground calcium carbonate, and the resultant mixture was stirred to obtain an about 75% pre-dispersed slurry. The pre-dispersed slurry was treated using a wet milling machine, manufactured by Ashizawa Finetech Ltd. (horizontal, cylindrical milling chamber having a size of: diameter: about 0.5 m; length: about 1.3 m). Conditions for the treatment were such that beads made of zirconia having a diameter of about 0.2 mm were used, the packing ratio was 83% by volume, the flow rate was about 15 liter/minute, and the pass frequency was 12. The obtained ground calcium carbonate had an average particle diameter of 0.28 μm. Further, the slurry concentration was 55%.

(36) <Ground Calcium Carbonate 4>

(37) Using a jaw crusher, a hammer crusher, and a roller mill, natural limestone was granulated so that the resultant particles had an average particle diameter of about 30 μm, and to the resultant particles were added water, and a commercially available polyacrylic acid dispersant in an amount of 1.5 part by mass in terms of the solids content, relative to 100 parts by mass of the ground calcium carbonate, and the resultant mixture was stirred to obtain an about 75% pre-dispersed slurry. The pre-dispersed slurry was treated using a wet milling machine, manufactured by Ashizawa Finetech Ltd. (horizontal, cylindrical milling chamber having a size of: diameter: about 0.5 m; length: about 1.3 m). Conditions for the treatment were such that beads made of zirconia having a diameter of about 0.2 mm were used, the packing ratio was 83% by volume, the flow rate was about 15 liter/minute, and the pass frequency was 34. The obtained ground calcium carbonate had an average particle diameter of 0.07 μm. Further, the slurry concentration was 50%.

(38) <Ground Calcium Carbonate 5>

(39) Using a jaw crusher, a hammer crusher, and a roller mill, natural limestone was granulated so that the resultant particles had an average particle diameter of about 30 μm, and to the resultant particles were added water, and a commercially available polyacrylic acid dispersant in an amount of 1.5 part by mass in terms of the solids content, relative to 100 parts by mass of the ground calcium carbonate, and the resultant mixture was stirred to obtain an about 75% pre-dispersed slurry. The pre-dispersed slurry was treated using a wet milling machine, manufactured by Ashizawa Finetech Ltd. (horizontal, cylindrical milling chamber having a size of: diameter: about 0.5 m; length: about 1.3 m). Conditions for the treatment were such that beads made of zirconia having a diameter of about 0.2 mm were used, the packing ratio was 83% by volume, the flow rate was about 15 liter/minute, and the pass frequency was 8. The obtained ground calcium carbonate had an average particle diameter of 0.40 μm. Further, the slurry concentration was 60%.

(40) <Measurement of the Average Particle Diameter of Ground Calcium Carbonate>

(41) With respect to the above-obtained ground calcium carbonate, an average particle diameter was determined by the following method. A particle size distribution of the ground calcium carbonate incorporated into the coating layer was measured using a particle size distribution measurement apparatus, Microtrac MT3300EXII, manufactured by Nikkiso Co., Ltd., under the measurement conditions shown below.

(42) TABLE-US-00001 Solvent Water Refractive index of the particle 1.65 Particle shape Non-spherical

(43) From the results of the particle size distribution, a particle size distribution curve, in terms of the volume, relating to the particle diameter of the pigment was prepared, and an average particle diameter was determined by calculation using analysis means attached to the measurement apparatus.

(44) <Preparation of a Coating Composition for Coating Layer>

(45) A coating composition for coating layer having the ingredients shown below was prepared.

(46) TABLE-US-00002 Pigment Type and amount incorporated are shown in Table 1. Styrene-butadiene copolymer latex (JSR-2605G, 10 Parts manufactured by JSR Corporation) Starch phosphate (MS#4600, manufactured by 10 Parts Nihon Shokuhin Kako Co., Ltd.)

(47) The ingredients having the above formulation were mixed and dispersed in water to prepare a composition having a concentration of 48%.

(48) TABLE-US-00003 TABLE 1 Pigment Evaluation Type of Amount Amount of rubbing Type of ground (Parts (Parts Evaluation Evaluation resistance base calcium by Other by of offset Evaluation of print with respect paper carbonate mass) pigment mass) printability of mottling density to printed area Example 1 Base Ground calcium 100 None 0 4 4 5 5 paper 1 carbonate 1 Example 2 Base Ground calcium 100 None 0 4 4 5 5 paper 1 carbonate 2 Example 3 Base Ground calcium 100 None 0 4 4 4 5 paper 1 carbonate 3 Example 4 Base Ground calcium 100 None 0 5 3 4 4 paper 2 carbonate 1 Example 5 Base Ground calcium 100 None 0 4 4 5 5 paper 3 carbonate 1 Example 6 Base Ground calcium 60 Kaolin A 40 3 3 3 3 paper 1 carbonate 1 Example 7 Base Ground calcium 80 Kaolin A 20 4 4 4 4 paper 1 carbonate 1 Example 8 Base Ground calcium 60 Precipitated 40 4 3 3 3 paper 1 carbonate 1 calcium carbonate A Example 9 Base Ground calcium 100 None 0 5 5 5 5 paper 6 carbonate 1 Example 10 Base Ground calcium 100 None 0 5 3 4 5 paper 7 carbonate 1 Example 11 Base Ground calcium 100 None 0 5 4 5 5 paper 8 carbonate 1 Example 12 Base Ground calcium 100 None 0 5 4 5 5 paper 6 carbonate 2 Example 13 Base Ground calcium 100 None 0 5 5 4 5 paper 6 carbonate 3 Example 14 Base Ground calcium 60 Kaolin A 40 4 3 3 3 paper 6 carbonate 1 Example 15 Base Ground calcium 60 Precipitated 40 4 4 3 3 paper 6 carbonate 1 calcium carbonate A Comparative Base Ground calcium 100 None 0 5 1 1 2 Example 1 paper 13 carbonate 1 Comparative Base Ground calcium 100 None 0 5 1 2 2 Example 2 paper 4 carbonate 1 Comparative Base Ground calcium 100 None 0 3 2 3 3 Example 3 paper 5 carbonate 1 Comparative Base Ground calcium 100 None 0 3 2 4 3 Example 4 paper 1 carbonate 4 Comparative Base Ground calcium 100 None 0 4 1 2 2 Example 5 paper 1 carbonate 5 Comparative Base Ground calcium 50 Kaolin A 50 3 1 2 2 Example 6 paper 1 carbonate 1 Comparative Base — 0 Kaolin B 100 1 1 1 1 Example 7 paper 1 Comparative Base Ground calcium 100 None 0 3 1 2 2 Example 8 paper 11 carbonate 1 Comparative Base Ground calcium 100 None 0 5 1 1 2 Example 9 paper 12 carbonate 1 Comparative Base Ground calcium 100 None 0 3 2 4 3 Example 10 paper 6 carbonate 4 Comparative Base Ground calcium 100 None 0 4 2 2 3 Example 11 paper 6 carbonate 5 Comparative Base Ground calcium 100 None 0 5 2 2 2 Example 12 paper 9 carbonate 1 Comparative Base Ground calcium 100 None 0 3 2 3 2 Example 13 paper 10 carbonate 1 Comparative Base Ground calcium 50 Kaolin A 50 3 2 2 2 Example 14 paper 6 carbonate 1 Comparative Base — 0 Kaolin B 100 2 1 1 1 Example 15 paper 6 Comparative Base — 0 Precipitated 100 3 3 5 1 Example 16 paper 1 calcium carbonate B

(49) The other pigments shown in Table 1 are as follows.

(50) Precipitated calcium carbonate A (TP123, manufactured by Okutama Kogyo Co., Ltd.; average particle diameter: 0.63 μm)

(51) Precipitated calcium carbonate B (Brilliant-15, manufactured by Shiraishi Calcium Kaisha, Ltd.; average particle diameter: 0.15 μm)

(52) Kaolin A (HG90, manufactured by KaMin LLC; average particle diameter: 0.19 μm)

(53) Kaolin B (KAOFINE 90, manufactured by Shiraishi Calcium Kaisha, Ltd.; average particle diameter: 1.1 μm)

(54) Printing coated papers in Examples and Comparative Examples were individually prepared by the following procedure.

(55) <Preparation of a Printing Coated Paper>

(56) The coating composition for coating layer was applied to both sides of the treated base paper using a blade coater, and dried, and then subjected to calendering treatment to prepare a printing coated paper. The coating weight per each side was 10 g/m.sup.2.

(57) (Evaluation of Offset Printability)

(58) Using, as an offset printing machine, an offset form rotary press, manufactured by Miyakoshi Printing Machinery Co., Ltd., printing was performed for 6,000 m under conditions such that the printing speed was 150 m/minute, T&K TOKA UV BEST CURE black and bronze-red were used as inks, and two UV irradiation sources at 8 kW were used. After the printing, the occurrence of blanket piling and the state of the printed sample were visually evaluated. The ratings “3” through “5” indicate that there is no problem from a practical point of view.

(59) 5: Very excellent.

(60) 4: Excellent.

(61) 3: There is no problem from a practical point of view.

(62) 2: Bad.

(63) 1: Very bad.

(64) (Evaluation of Mottling)

(65) Using, as an ink-jet printing machine, printing machine Prosper 5000XL, manufactured by Eastman Kodak Company (ink: pigment ink; printing speed: 75 m/minute), solid printing was performed by a method in which solid patterns, 3 cm×3 cm square, of 7 colors in total are recorded on a printing coated paper by the printing machine wherein the patterns are arranged in a horizontal line, and the 7 colors include black, cyan, magenta, yellow, and blended colors (red, green, and blue) of 2 colors among the above 3-color inks, excluding the black ink. With respect to the solid printed image area of each color, the occurrence of mottling (mark of extremely small spots) was visually evaluated. In the present invention, the ratings “3” through “5” indicate that the occurrence of mottling can be suppressed.

(66) 5: Mottling is satisfactorily suppressed.

(67) 4: Extremely slight mottling is recognized.

(68) 3: Slight mottling is recognized. There is no problem from a practical point of view.

(69) 2: Partial mottling is recognized.

(70) 1: Definite mottling is recognized.

(71) (Evaluation of Print Density)

(72) Using, as an ink jet printing machine, printing machine Truepress Jet520, manufactured by Dainippon Screen Mfg. Co., Ltd. (ink: dye ink; printing speed: 72 m/minute), solid printing was performed by a method in which solid patterns, 2 cm×2 cm square, of 7 colors in total are recorded on a printing coated paper by the printing machine wherein the patterns are arranged in a horizontal line, and the 7 colors include black, cyan, magenta, yellow, and blended colors (red, green, and blue) of 2 colors among the above 3-color inks, excluding the black ink. With respect to the solid printed image area of each color, the print density was visually evaluated from the viewpoint of the color density and color brightness. In the present invention, the ratings “3” through “5” indicate that the print density of a dye ink is excellent.

(73) 5: Both the color density and color brightness are excellent.

(74) 4: Any one of the color density and color brightness is poorer than “5” but excellent.

(75) 3: The color density and color brightness are at a level having no problem from a practical point of view.

(76) 2: Any one of the color density and color brightness is poorer than “3” and has a problem from a practical point of view.

(77) 1: Both the color density and color brightness are poor and have a problem from a practical point of view.

(78) (Evaluation of Rubbing Resistance with Respect to the Printed Area)

(79) Using, as an ink-jet printing machine, printing machine Prosper 5000XL, manufactured by Eastman Kodak Company (ink: pigment ink; printing speed: 75 m/minute), a solid image having a size of 18 cm×18 cm was printed with a black ink on a printing coated paper by the printing machine. After a lapse of one hour from the printing, an abrasion test was performed 25 times in which cotton gauze was pressed against the printed surface of the printing coated paper at a load of 500 g or 300 g so that the pressed area was 4 cm.sup.2. The state of a scuff caused in the printed area was visually evaluated. In the present invention, the ratings “3” through “5” indicate that the nabbing resistance with respect to the printed area is excellent.

(80) 5: At 500 g, almost no scuff is recognized.

(81) 4: At 500 g, a slight scuff is recognized, which is an acceptable level.

(82) 3: At 300 g, a slight scuff is recognized, which is an acceptable level.

(83) 2: At 300 g, a scuff is recognized.

(84) 1: At 300 g, a marked scuff is recognized.

(85) With respect to the printing coated papers in Examples and Comparative Examples, the results of the evaluation of offset printability and the evaluation of the mottling, print density, and rubbing resistance with respect to the printed area in ink-jet printing are shown in Table 1.

(86) From Table 1, it is found that the printing coated papers in Examples 1 to 15, which correspond to the printing coated paper of the present invention, have offset printability and, in ink-jet printing, can suppress the occurrence of mottling and exhibit excellent rubbing resistance with respect to the printed area and excellent print density of a dye ink, and can produce a printed material having excellent image quality. On the other hand, from Table 1, it is found that, in Comparative Examples 1 to 16, each of which does not satisfy the requirements of the present invention, any of the effects of the present invention are not achieved.

(87) As is apparent from the results of ink-jet printing performed using the printing coated papers in Examples 1 to 15, by the method for producing a printed material of the present invention, there can be produced a printed material advantageous not only in that the occurrence of mottling is suppressed, but also in that the print density of a dye ink and the rubbing resistance with respect to the printed area are excellent.