JP2000256992A - Printing paper coated with pigment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a pigment-coated printing paper having both coated layer strength enough to endure offset printing at a rising speed and blister resistance, and showing excellent image density, ink absorbency, image waterproof and feathering resistance. SOLUTION: When this pigment-coated printing paper has one or more pigment-coated layers on base paper, a cationic layer formed with 0.05-2.0 g/m2 cationic dye-fixing agent based on its bone dry weight is coated on the top surface of the pigment-coated printing paper and a pigment-coated layer mainly comprising pigment and a binder is formed under the cationic layer. The binder contains at least 5-30 pts.wt. styrene-butadiene copolymer latex based on 100 pts.wt. pigment and shows 20-50 g/m2 10 s-cobb sizing degree in 5% isopropanol aqueous solution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pigment-coated paper for printing. More specifically, not only has excellent coating layer strength and blister resistance that can withstand high-speed printing in offset printing, but also excellent image density, ink absorption, image water resistance, and image resistance in inkjet recording using a water-based ink. The present invention relates to a pigment coated paper for printing having a feathering property.

[0002]

2. Description of the Related Art In recent years, in multi-color printing of a plate-making system, particularly in offset printing, the speed of a printing press and the visualization of printed matter have been advanced, and the coating layer strength that can withstand them as a pigment coated paper for printing has been advanced. Characteristics such as blister resistance are required.

On the other hand, as a recording method different from the plate making method such as offset printing, an ink jet recording method has been rapidly spreading in recent years. The ink jet recording method prints images, characters, etc. by flying micro droplets of ink by various operating principles and attaching them to a recording sheet such as paper. Due to the features such as ease, it is expected that it will expand further in the future.

Recently, a system in which an ink jet recording system is combined with the multicolor printing system of the plate making system described above has been developed, and addressing, numbering, and the like have been performed for general printing, particularly for offset printed products. Printing of variable information such as a bar code using an ink jet recording method has been performed.

Under these circumstances, pigment-coated paper used for general printing, particularly for offset printing, is required to have excellent inkjet recording suitability while maintaining the conventional offset printing suitability. Have been.

That is, the printing pigment coated paper used herein has a strong coating layer strength that does not cause picking or the like in high-speed printing in offset printing, and does not generate blisters called swelling. (Blister resistance), and in ink-jet recording, the density of the printed area (image density) is high, the ink absorption (ink absorption) is fast, and the bleeding of the printed area due to the lateral diffusion of ink (feather resistance) It is required that the ink does not bleed out (water resistance of the image) even when water droplets adhere to the printed portion from the viewpoint of storability.

[0007] In recent years, with regard to pigment-coated paper for printing, a great number of studies have been made in order to meet these demands as the speed of printing presses and the visualization of printed matter are further advanced. Specifically, attempts have been made to optimize pigments or binders for the purpose of imparting quality such as coating layer strength and blister resistance that can withstand high-speed printing speeds, as well as ink adhesion and print gloss. I have. For example, JP-A-6-280
No. 195 discloses that an organic porous pigment having a specific particle size is contained.
In Japanese Patent Application Laid-Open Publication No. H10-157, it is proposed to use a specific latex as a base paper undercoat.

When ink-jet recording is performed on these pigment-coated printing papers, satisfactory qualities such as image density, ink absorbency, and image water resistance cannot be obtained. This is due to the fact that ink droplets adhering to the paper cannot be insolubilized on or in the coating layer during ink jet recording, and that there are no voids inside the coating layer that can instantly absorb ink droplets. And the like.

On the other hand, in a pigment coated paper dedicated to ink jet recording, as disclosed in JP-A-55-51583 and JP-A-55-144172, a pigment using non-colloidal silica powder is used. It has been proposed to use a component that adsorbs a dye in ink or ink.

When offset printing is performed on these inkjet recording papers, some printing is possible by adjusting the printing ink used and the printing speed.
Under the current printing conditions in which the speed has been further increased, picking is remarkably generated and printing cannot be performed at present. Also,
Due to the high absorption characteristics of the paper itself, the vehicle component in the printing ink permeates into the inside of the coating layer, making it impossible to obtain excellent print gloss.

As described above, among pigment coated papers that can be printed under various conditions of offset printing, which have been increasing in speed in recent years, there has not yet been proposed a pigment coated paper for printing that can obtain excellent quality even in ink jet recording.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to provide a pigment coated paper for printing having excellent suitability for offset printing and ink jet recording.

[0013]

The present inventors have conducted intensive studies in view of the above, and as a result, have come to invent the pigment-coated paper for printing of the present invention. That is, in the coated paper for printing of the present invention, in a pigment coated paper for printing provided with one or more pigment coated layers on a base paper, a cationic dye fixing agent is insulated on the outermost layer of the pigment coated paper. A cation layer coated with 0.05 to 2.0 g / m ^{2 in} dry weight is provided, and a pigment coating layer provided below the cation layer is mainly composed of a pigment and a binder. The styrene-butadiene copolymer latex is contained in an amount of 5 to 30 parts by weight based on 100 parts by weight of the pigment, and the 10-second cobb size of a 5% aqueous solution of isopropanol is 20 to 50 g / m ^2. Things.

In the present invention, the pigment may have an oil absorption of 1
It is preferable that the pigment is 00 ml / 100 g or more.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the pigment coated paper for printing of the present invention will be described in detail. 2. Description of the Related Art In general, a pigment coated paper for printing having a coating layer mainly containing a binder such as a pigment such as kaolin and calcium carbonate, a starch, and various copolymer latexes on a base paper is manufactured. When roughly classified, there are gloss-coated paper having excellent glossiness and matte-coated paper having matte tone, which are used properly according to various uses.

When ink-jet recording is performed on gloss coated paper having excellent glossiness, the ink absorbency is very poor, and it takes a considerable time to completely absorb the ink. This is because a dense coating layer is formed by blending fine pigments or performing a strong calendering process to develop gloss, and this is because there is no void for absorbing ink instantaneously. In addition, since the ink is present on the surface of the coating layer for a long time, the dye component in the ink tends to remain on the surface of the coating layer, and the image density is developed to some extent, but at the same time, the ink is diffused in the horizontal direction, and the printing portion is A problem called feathering, which is jagged like bird feathers, occurs. Further, in the case where water drops adhere after printing, for example, a problem also arises in that the dye component once dried and solidified is dissolved again and exudes.

On the other hand, when ink jet recording is performed on matte matte coated paper, the ink absorbency is at a slightly better level than that of the above glossy one.
A satisfactory image density cannot be obtained. This is because a relatively porous coating layer is formed by blending a coarse pigment and performing light calendering, etc., so that the time to absorb the ink is reduced, but even the dye components in the ink are inside the coating layer. Image density does not appear. In addition, the above-described problem of feathering and the problem of water droplets adhering after printing also occur.

As described above, there are still a large number of printing pigment-coated papers which have been proposed so far which have excellent ink jet aptitude, especially image density, ink absorption, image water resistance and feathering. Instead, there is a demand for a pigment-coated paper for printing that has the above-described suitability for inkjet printing while maintaining suitability for offset printing.

As a technique for developing image density and image water resistance, a cationic dye fixing agent comprising a tertiary amine, a quaternary ammonium salt or the like is contained in the coating layer in order to insolubilize the dye component in the ink. There is a method. However, when such a cationic dye fixing agent is blended with a coating liquid for a printing pigment coated paper generally exhibiting anionic properties as described above, thickening due to aggregation occurs and coating applicability is significantly reduced. Let it. As a result, the coating solution is diluted to a concentration at which the coating can be performed. As a result of coating at a low concentration, the strength of the coating layer is reduced, the ink deposition is uneven, and the quality is remarkably impaired.

However, as shown in the present invention, a cationic layer mainly comprising a cationic dye fixing agent is provided on the outermost layer,
It has been found that by insolubilizing the ink near the outermost layer, an excellent image density can be obtained, and at the same time, an excellent ink absorption and feathering resistance can be obtained. This is because, when a coating liquid containing a cationic polymer compound is applied, the lower pigment coating layer re-swells and, at the same time, the pigment coating layer is aggregated and structured by the cationic polymer compound. ,
It is considered that the resulting new voids promoted the absorption of the ink in the depth direction, and as a result, excellent ink absorbency and feathering were obtained. It has also been found that this improves the blister resistance in offset printing. Blisters, called blisters, cannot be tolerated by the internal pressure caused by the water content of the printing pigment coated paper instantaneously becoming water vapor due to high-temperature and high-speed drying after offset printing, and swell. As a phenomenon, in the present invention, since the water vapor thus generated can be released to the outside through voids formed by the structuring of the pigment coating layer, excellent blister resistance can be obtained as a result.

The coating amount of the cationic dye fixing agent is desirably 0.05 to 2.0 g / m ² in absolute dry weight, and the absolute dry weight of the cationic dye fixing agent is 0.05 g / m ^2.
If it is less than / m ^2, image density, ink absorbability, the effect can not be obtained for the image water resistance, also when it is more beyond 2.0 g / m ^2, the ink absorbency is reduced.

As a configuration similar to that of the present invention, Japanese Patent Application Laid-Open
As disclosed in Japanese Patent Application No. -17125, it has been proposed to provide an ink fixing layer composed of a composition mainly composed of cationic colloidal silica on the outermost layer. This is a so-called ink jet dedicated paper dedicated to ink jet recording, which is completely different from the pigment coated paper for printing of the present invention.

As the cationic dye fixing agent according to the present invention, a monomer, oligomer or polymer of a primary to tertiary amine or quaternary ammonium salt can be used. Specific examples include dimethylamine / epichlorohydrin condensate, acrylamide / diallylamine copolymer, polyvinylamine copolymer, dicyandiamide, dimethyl / diallylammonium chloride and the like, but are not particularly limited. Also, a water-soluble binder such as polyvinyl alcohol and a surface sizing agent,
Of course, a penetrant, an antifoaming agent and the like can be appropriately used in combination.

Examples of the pigment in the pigment coating layer of the present invention include kaolin, clay, calcium carbonate, satin white, activated clay, silica, magnesium carbonate, titanium dioxide, plastic pigment and the like. is not. The pigment used here is J
Oil absorption by IS-K5101 is 100ml / 100g
By containing these, more excellent ink absorbency can be imparted.

As the binder of the pigment coating layer of the present invention,
It is desirable to contain a styrene-butadiene copolymer latex. In the present invention, since the outermost layer is coated with the cationic dye fixing agent, the coating layer strength is reduced, and there is a concern about the problem of picking in offset printing. In order to maintain the coating layer strength, it is conceivable that a large amount of binder is contained, but not only cost but also the effect on ink absorbency in inkjet recording,
Not the preferred way. However, it has been found that by containing a styrene-butadiene copolymer latex as one of the binders in the pigment coating layer, the strength of the coating layer can be sufficiently maintained, and various properties in ink jet recording can be balanced. .

The styrene-butadiene copolymer latex used as a binder in the pigment coating layer of the present invention preferably contains 5 to 30 parts by weight based on 100 parts by weight of the pigment. If the styrene-butadiene copolymer latex is less than 5 parts by weight, a coating layer strength that can withstand high-speed printing cannot be obtained, and if it exceeds 30 parts by weight, the above-mentioned cationic dye fixing agent coating effect on ink absorption. Can not be obtained.

The binders other than the styrene-butadiene copolymer latex in the pigment coating layer of the present invention include acrylic, styrene-acrylic, vinyl acetate-acrylic, ethylene-vinyl acetate, butadiene-based. Various copolymer latexes such as methyl methacrylic and vinyl acetate-butyl acrylate, synthetic binders such as polyvinyl alcohol, oxidized starch, etherified starch, esterified starch, enzyme-modified starch and cold water obtained by flash-drying them Examples include natural binders such as soluble starch, casein, and soybean protein, but are not particularly limited. If necessary, various commonly used auxiliaries such as a dispersant, a thickener, a water retention agent, a defoaming agent, a waterproofing agent, and a coloring agent can be appropriately used.

The coating method for the outermost layer and the pigment coating layer thereunder include a blade coater, an air knife coater, a rod coater, a gravure coater, a curtain coater, a die coater, a gate roll coater, and the like.
Film transfer coater, etc.
There is no particular limitation.

In the pigment coated paper for printing of the present invention, 5%
The 10 second cobb size of the aqueous isopropanol solution is 2
Desirably, it is 0 to 50 g / m ² . If the cobb size is less than 20 g / m, the ink absorbency deteriorates, and ink leakage or bleeding occurs at a portion where print dots overlap, and an image or the like cannot be faithfully reproduced. On the other hand, if it exceeds 50 g / m ² , not only the problem of feathering due to the lateral diffusion of ink in ink jet recording, but also the problem of picking in high-speed offset printing will occur.

The pigment-coated paper of the present invention may be processed by a calender such as a super calender, a gloss calender, or a soft calender.

The base paper used in the present invention includes:
Chemical pulp such as LBKP, NBKP, GP, PGW,
Mechanical pulp such as RMP, TMP, CTMP, CMP, CGP, pulp such as waste paper pulp such as DIP, various fillers such as light calcium carbonate, heavy calcium carbonate, talc, clay and kaolin, sizing agents, fixing agents, Examples include various additives such as a retention agent, a cationizing agent, and a paper strength agent, but are not particularly limited.

[0032]

EXAMPLES Hereinafter, the effects of the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto. Further, “parts” and “%” in the examples indicate “parts by weight” and “% by weight”, respectively. The coating amount indicates the absolute dry weight, and indicates the coating amount per one side unless otherwise specified.

Example 1 Using a raw material prepared with the following base paper composition, a fourdrinier paper machine having an ISP type size press was used to obtain a basis weight of 70 g /
A base paper was prepared so as to have a m ² (absolutely dry) and a finished moisture of 4%. In the size press, an aqueous starch solution was applied at 1.5 g / m ² per side. <Base paper composition> LBKP (filtration 350 mlcsf) 80% NBKP (filtration 420 mlcsf) 20% Commercial calcium carbonate (* expressed by ash content in base paper) 5% * Commercial alkyl ketene dimer based internal sizing agent (AKD) ) 0.01% Commercially available amphoteric starch 0.2% Commercially available cationic polyacrylamide retention aid 0.03%

Using a coating liquid containing the following pigment coating layer, a blade coater was used to coat 12 g / m ² per side on the base paper.
, And dried to a finished water content of 5% to prepare a pigment-coated paper. <Pigment coating layer composition> Commercially available primary kaolin (oil absorption: 45 ml / 100 g) 30 parts Commercial heavy calcium carbonate (oil absorption: 40 ml / 100 g) 50 parts Commercially available secondary kaolin (oil absorption: 60 ml / 100 g) 20 parts Commercially available polyacryl Acid dispersant 0.1 part Commercial phosphorylated starch 4 parts Commercial styrene-butadiene copolymer latex 11 parts Calcium stearate 0.3 part Sodium hydroxide Adjusted to alkaline

<Composition of cationic layer> A commercially available cationic dye fixing agent was applied on the above-mentioned pigment-coated paper using an air knife coater at a concentration of 0.5 / m ² per side to form a cationic layer. It was dried to 6% and finished using a super calender to obtain a pigment coated paper for printing. Cobb size at this time (5%
JIS-P8140 except that an isopropanol aqueous solution was used and the contact time between the measurement solvent and the sample was 10 seconds.
According to. Thereafter, the cobb size was measured in this manner. ) Was 38 g / m ² .

Example 2 A pigment coated paper for printing was obtained in the same manner as in Example 1 except that the coating amount of the cationic dye fixing agent in the cationic layer provided on the outermost layer was 0.05 g / m ² . . The degree of cobb size at this time was 22 g / m ² .

Example 3 A pigment coated paper for printing was obtained in the same manner as in Example 1 except that the coating amount of the cationic dye fixing agent was changed to 1.0 g / m ² in the cationic layer provided on the outermost layer. . The degree of cobb size at this time was 37 g / m ² .

Example 4 A pigment coated paper for printing was obtained in the same manner as in Example 3 except that the commercially available styrene-butadiene copolymer latex of the pigment coated layer was changed to 15 parts. The cobb size at this time is 20g
/ m ² .

Example 5 Same as Example 1 except that 5 parts of a commercially available styrene-butadiene copolymer latex, 10 parts of a commercially available acrylic latex, and 4 parts of a commercially available phosphorylated starch were used as binders for the pigment coating layer. To obtain a pigment-coated paper for printing. The degree of cobb size at this time was 34 g / m ² .

Example 6 Commercially available light calcium carbonate (oil absorption 120 ml / liter) was used in place of commercially available heavy calcium carbonate as a pigment for the pigment coating layer.
100 g), as a binder, 15 parts of a commercially available styrene-butadiene copolymer latex, 2 parts of a commercially available phosphorylated starch, and 0.5 part of a commercially available polyacrylic acid-based dispersant.
In the same manner as in Example 3, except that the above-mentioned parts were used, a pigment-coated paper for printing was obtained. The degree of cobb size at this time was 50 g / m ² .

Example 7 A pigment coated paper for printing was obtained in the same manner as in Example 6, except that the coating amount of the cationic dye fixing agent was 2.0 g / m ² in the cationic layer provided on the outermost layer. . The degree of cobb size at this time was 22 g / m ² .

Example 8 A pigment coated paper was obtained with the following composition of the pigment coating layer.
A commercially available cationic dye fixing agent is applied to the upper layer of the pigment coated layer at 1.0 g / m ² to form a cationic layer, which is dried to a final moisture of 6%, and finished using a super calender. A pigment coated paper for printing was obtained. The degree of cobb size at this time was 40 g / m ² . <Pigment coating layer composition> Commercially available primary kaolin (oil absorption 45 ml / 100 g) 50 parts Commercial light calcium carbonate (oil absorption 120 ml / 100 g) 30 parts Commercial silica (oil absorption 260 ml / 100 g) 20 parts Commercially available polyacrylic acid-based dispersion 0.5 part Commercially available phosphorylated starch 2 parts Commercially available styrene-butadiene copolymer latex 25 parts Calcium stearate 0.3 part Sodium hydroxide Adjusted to alkaline

Example 9 A pigment coated paper for printing was obtained in the same manner as in Example 8, except that the commercially available styrene-butadiene copolymer latex of the pigment coated layer was changed to 30 parts. Cobb size at this time is 25g
/ m ² .

Comparative Example 1 A pigment coated paper for printing was obtained in the same manner as in Example 1 except that the outermost cation layer was not provided. At this time, the cobb size degree was 17 g / m ² .

Comparative Example 2 A pigment coated paper for printing was obtained in the same manner as in Example 1 except that the coating amount of the cationic dye fixing agent was changed to 2.5 g / m ² in the cationic layer provided on the outermost layer. . At this time, the cobb size degree was 17 g / m ² .

Comparative Example 3 A pigment coated paper for printing was obtained in the same manner as in Example 5 except that the commercially available styrene-butadiene copolymer latex for the pigment coated layer was changed to 3 parts. The cobb size at this time is 38 g /
m ² .

Comparative Example 4 A pigment coated paper for printing was prepared in the same manner as in Example 3 except that 5 parts of a commercially available styrene-butadiene copolymer latex was used as a binder for the pigment coated layer, and that the commercially available phosphorylated starch was omitted. I got The cobb size at this time is 55 g / m ^2.
Met.

Comparative Example 5 Example 8 was repeated except that 35 parts of a commercially available styrene-butadiene copolymer latex were used as the binder for the pigment coating layer.
A pigment coated paper for printing was obtained in the same manner as described above. The degree of Cobb size at this time was 18 g / m ² .

Comparative Example 6 A pigment coated layer was prepared by adding 10 parts by weight of a commercially available cationic dye fixing agent to the pigment coated layer of Example 1 to obtain a pigment coated paper for printing. Note that an air knife coater was used because streaks frequently occurred with the blade coater during the coating of the pigment coating layer. The degree of cobb size at this time was 38 g / m ² .

Table 1 shows the evaluation results of the pigment-coated printing papers produced in Examples 1 to 9 and Comparative Examples 1 to 6. still,
The measured values in the table were obtained by the following methods.

1) Coating Layer Strength Using an RI printing machine manufactured by Akira Seisakusho Co., Ltd., water was attached to the sample and then IPI ink was printed, and the degree of picking on the printed surface was visually determined. In the five-level evaluation, 5 is the best level, and the allowable limit in actual printing is 3.

2) Blister resistance A commercially available ink for rotary offset printing was applied to both surfaces of the sample with R
I print with a printing machine, wrap the print sample in aluminum foil, put it in silicon oil at 250 ° C for 5 seconds,
The appearance of the blister was visually evaluated. In the five-level evaluation, 5 is the best level, and the allowable limit in actual printing is 3.

3) Image density An inkjet printer (BJ-2) manufactured by Canon Inc.
20JS), solid printing was performed, and after sufficient drying, the optical density of the solid portion was measured using an optical densitometer (RD, manufactured by Macbeth).
-919). In practice, 1.20 or more is desirable.

4) Ink Absorption Inkjet printer manufactured by Canon (BJ-22)
0JS), solid printing was performed, and the time until the glossiness of the printed portion disappeared was measured. In practice, it is desirably 15 seconds or less.

5) Image Water Resistance An inkjet printer manufactured by Canon (BJC-B)
420J), and pure water is applied to the printed portion with No. 420J).
One drop was dropped with a 15 injection needle, and after leaving to dry, the state of ink flow was visually evaluated. In the five-point evaluation, 5 is the best, and the allowable limit in practical use is 3.

6) Feathering resistance Ink jet printer (BJ-22) manufactured by Canon Inc.
0JS), and the degree of bleeding at the outer edge of the character was visually evaluated. In the five-level evaluation, 5 is a sample having no bleeding at all, and the allowable limit in practical use is 3.

[0057]

[Table 1]

Evaluation results: As can be seen from the evaluation results of Examples 1 to 9 and Comparative Examples 1 to 5, the outermost layer was coated with a cationic dye fixing agent in an absolute dry weight of 0.05 to 2.0 g / m ^2. And a pigment coating layer containing 5 to 30 parts of a styrene-butadiene copolymer latex as a binder with respect to 100 parts of the pigment as a binder, and a 5% aqueous solution of isopropanol under the cationic layer. By setting the 10 second cobb size degree to 20 to 50 g / m ² , excellent coating strength, blister resistance and offset printing suitability, and excellent image density, ink absorption, image water resistance, and feathering resistance A pigment-coated paper for printing that has both inkjet recording suitability is obtained.

As can be seen from Examples 6 and 8, the pigment in the pigment coating layer has an oil absorption of 100 ml / ml.
By using the pigment of 100 g or more, excellent ink absorbency can be obtained while maintaining suitability for offset printing.

On the other hand, in Comparative Example 6, a cationic dye fixing agent was contained in the pigment coating layer. However, even if the coating liquid concentration was lowered, coating defects such as streaks occurred frequently even with a blade coater. In addition, even if the coating method is changed and the coating method is somehow obtained, it is impossible to obtain a printing pigment coated paper which has a very low coating layer strength and can withstand high-speed offset printing.

[0061]

As is apparent from the above results, in a pigment coated paper for printing having one or more pigment coated layers on a base paper, a cationic dye is fixed on the outermost layer of the pigment coated paper. A cationic layer formed by coating the agent at an absolute dry weight of 0.05 to 2.0 g / m ² , and a pigment coated layer mainly composed of a pigment and a binder provided below the cationic layer; Excellent offset printing by containing at least 5 to 30 parts of a styrene-butadiene copolymer latex as a binder with respect to 100 parts of a pigment, and setting the 10-second cobb size of a 5% aqueous solution of isopropanol to 20 to 50 g / m ^2. Thus, a pigment-coated paper for printing having suitability and inkjet recording suitability can be obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D21H 19/58 B41J 3/04 101Y F-term (Reference) 2C056 EA01 EA04 EA21 FC06 2H086 BA12 BA21 BA33 BA34 BA41 BA42 BA47 4L055 AG11 AG12 AG18 AG27 AG35 AG48 AG63 AG65 AG71 AG72 AG76 AG89 AG97 AH02 AH09 AH37 AH50 AJ04 BE09 EA10 EA14 EA25 EA32 FA13 FA15 FA19 FA30 GA09 GA19

Claims (2)

[Claims] 1. A pigment coated paper for printing having one or more pigment coated layers on a base paper, wherein the outermost layer of the pigment coated paper is coated with a cationic dye fixing agent in an absolute dry weight of from 0.05 to 0.05%. 2.0g /
m ² coated cationic layer is provided, and a pigment coated layer provided below the cationic layer is mainly composed of a pigment and a binder, and at least a styrene-butadiene copolymer latex is used as the binder at 100% by weight of the pigment. 5 to 30 parts by weight per part and a 10% cobb size of a 5% aqueous solution of isopropanol is 20 to 50 g.
/ m ^2, which is a pigment-coated paper for printing. 2. The pigment coated paper for printing according to claim 1, wherein the pigment is a pigment having an oil absorption of 100 ml / 100 g or more.