JP2006240270A - Inkjet recording sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recording medium which can obtain high image density when printed in a nonaqueous pigment ink and a uniform image and prevent the occurrence of unevenness in solid printing. <P>SOLUTION: An ink receiving layer mainly composed of a pigment and a binding agent is provided on a support surface by at least one coating method selected from either a curtain-coating method or a die-coating method and has a basis weight of the ink receiving layer to 2 to 10 g/m<SP>2</SP>, and the pigment contained in the ink receiving layer is synthetic amorphous silica having an oil absorption amount of 150 to 250 ml/100g. Furthermore, the ink receiving layer is provided on both surfaces of the support. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ink jet recording paper for performing ink jet recording using a non-aqueous (oil-based) pigment ink.

  The ink jet recording system has been rapidly spreading recently because it can perform high speed printing with low noise. This recording method is a method in which liquid ink with high fluidity is ejected from fine nozzles and recorded on recording paper, and is roughly divided into two methods: on-demand type (optional jet) and continuous type (continuous jet). The

  As the ink used in the ink jet recording system, conventionally, an aqueous type ink prepared by dissolving a colorant comprising a water-soluble dye such as an acid dye, a direct dye or a basic dye in a glycol solvent and water is used. I came. However, when water-based ink is used, there is a problem that the printing portion of the ink jet recording paper absorbs water and expands, causing paper jam in the printer and a decrease in image position accuracy. Therefore, in recent years, a non-aqueous ink prepared by dissolving or dispersing a colorant in a non-aqueous solvent has attracted attention.

As such a non-aqueous ink, there are a non-aqueous dye ink in which an oil-soluble dye is dispersed or dissolved in a high boiling point solvent as a colorant, and a non-aqueous pigment ink using a pigment instead of a dye as a colorant. Non-aqueous pigment inks are superior to non-aqueous dye inks in that image bleeding is small and light resistance is high.
As a recording medium used for ink jet recording using such a non-aqueous ink, Patent Document 1 proposes a recording medium made of silica and an adhesive. In Patent Document 2, the ink receiving layer contains at least one pigment selected from the group consisting of calcium carbonate, kaolin, and barium sulfate, and the Bristow absorption coefficient of the colored liquid using the high boiling point solvent is 0. An ink jet recording medium having a viscosity of 5 to 5 ml / m ² · sec 1/2 is disclosed.

JP-A-1-255580 JP 2003-127524 A

  However, in the above-described conventional technology, an ink jet recording sheet having a high recorded image density, a uniform image, and no occurrence of betarum even when recording with a non-aqueous pigment ink has not yet been obtained. In the ink jet recording sheet described in Patent Document 1, the suitability of ink jet recording using water-based ink is improved, but the density of an image printed with a non-aqueous pigment ink is reduced, and a solid image (especially mixed color) is printed. When this occurs, unevenness occurs and the image becomes non-uniform. Further, Patent Document 2 shows an improvement in image quality related to a non-aqueous pigment ink, but the ink absorbability is lowered because a pigment other than synthetic amorphous silica is mainly used in the ink receiving layer.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording medium that can obtain a high image density when printed with a non-aqueous pigment ink, has a uniform image, and does not generate any stickiness.

  The inventors of the present invention have studied non-aqueous inks and inkjet recording media having various configurations in order to solve the above-described problems, and have achieved the object of the present invention by using the following configurations. .

That is, the present invention relates to an ink jet recording paper for recording using a non-aqueous ink comprising a solvent, a dispersant, and a pigment, the ink jet recording paper having a pigment and a binder as main components on a support surface. The ink receiving layer is provided so that the coating amount of the ink receiving layer is ² to 10 g / m ² by at least one coating method selected from the curtain coating method or the die coating method, and the ink receiving layer is provided on the ink receiving layer. The pigment contained in the ink jet recording paper is characterized by synthetic amorphous silica having an oil absorption of 150 to 250 ml / 100 g. The ink receiving layer is preferably provided on both sides of the support.

  In the present invention, it is possible to obtain an ink jet recording medium capable of improving the color developability of a non-aqueous pigment ink without impairing ink absorption. Further, even when printing with a non-aqueous pigment ink, the image is uniform and there is no occurrence of any staleness.

  The ink jet recording paper in the present invention preferably comprises a support having a sheet shape and an ink receiving layer formed thereon. The support of the ink jet recording paper of the present invention is not particularly limited, and is a sheet-like material such as paper mainly made of wood fiber (pulp), plastics such as polyethylene, or non-woven fabric mainly made of wood fiber or synthetic fiber. Can be used. Moreover, what bonded together the different kind of sheet-like substance mentioned above can also be used as a support body. In the present invention, it is desirable to use paper as a support, particularly in terms of excellent ink absorbability.

  Wood pulp that constitutes the paper support, chemical pulps such as LBKP and NBKP, mechanical pulps such as GP, PGW, RMP, TMP, CTMP, CMP, and CGP, and pulps such as waste paper pulp such as DIP are used alone or in combination. It is possible to use. The paper support is mixed with the above-mentioned wood pulp, if necessary, with various known additives such as fillers, binders, sizing agents, fixing agents, yield improvers, paper strength enhancers, etc. It can be obtained by drying after forming a web with various paper machines such as a paper machine and a twin wire paper machine. In the paper support, the presence or absence of an internal sizing agent, the presence or absence of an internal filler, and the presence or absence of a size press are not limited.

In the present invention, synthetic amorphous silica is mainly used as the pigment of the ink receiving layer, but other commonly used pigments (for example, kaolin, alumina, plastic pigment, etc.) are mixed within a range that does not impair the effects of the invention. It is also possible to do.
However, pigments other than synthetic amorphous silica are preferably blended in the pigment of the ink receiving layer in a proportion of less than 10% by mass.

The synthetic amorphous silica contained in the ink receiving layer of the present invention is formed by a neutralization reaction between sodium silicate and sulfuric acid, and can be divided into various properties as a functional filler depending on the production method. The oil absorption specified by K-5101 is required to be 150 ml / 100 g or more and 250 ml / 100 g or less. If it is less than 150 ml / 100 g, the ink absorbability deteriorates, which is not preferable. If it exceeds 250 ml / 100 g, the density of the recorded image decreases.
Furthermore, the average secondary particle diameter of the synthetic amorphous silica is preferably 5 to 20 μm, more preferably 7 to 12 μm. When the average secondary particle diameter is smaller than 5 μm, there arises a problem that the surface strength of the coating layer is lowered. On the other hand, if the average secondary particle size is larger than 20 μm, the image becomes extremely rough or the ink absorbability deteriorates, which is not preferable. The average secondary particle diameter of the synthetic amorphous silica described above can be measured using a master sizer manufactured by Malvern.

The ink receiving layer of the present invention contains a hydrophilic binder in order to maintain the properties as a coating film. Examples of the hydrophilic binder include polyvinyl alcohol and modified products thereof, oxidized starch, etherified starch, casein, gelatin, soy protein, carboxymethyl cellulose, SB latex, NB latex, acrylic latex, vinyl acetate polymer latex, ethylene acetate Vinyl latex, polyurethane, unsaturated polyester resin, etc. can be used.
In the present invention, at least one of these hydrophilic binders can be used, and the number of blended parts is preferably 10 to 80 parts by weight with respect to 100 parts by weight of the pigment. When the number of blended parts of the binder is small, the surface strength is insufficient, and when it is too large, the ink absorbability is insufficient.

In the present invention, the ink receiving layer preferably contains a cationic water-soluble resin. Examples of the cationic water-soluble resin used in the present invention include secondary amines, tertiary amines, and quaternary ammonium salts such as polyethyleneimine salts, dimethylamine epihalohydrin condensates, polyvinylamine salts, polyallylamine salts, and polydimethylaminoethyl. Examples thereof include methacrylate quaternary salts, polydiallyldimethylammonium salts, diallylamine acrylamide copolymer salts, and quaternary ammonium salts of polystyrene. Among them, a dimethylamine epihalohydrin condensate having excellent printing quality for both dye ink and pigment ink and particularly high printing density and water resistance is preferable. Two or more of these cationic resins can be used in combination.
These cationic water-soluble resins have an action of capturing the pigment, which is a color material in the pigment ink, by dispersing it in a solvent with a dispersant and charging the surface negatively. Therefore, the pigment ink remains in the vicinity of the surface of the ink receiving layer, and the color developability is improved.

  In addition, sizing agent, pigment dispersant, thickener, fluidity improver, surfactant, antifoaming agent, antifoaming agent, mold release agent, foaming agent, penetrating agent, coloring dye on support or ink receiving layer , Fluorescent whitening agents, ultraviolet absorbers, antioxidants, antiseptics, antibacterial agents, water resistance agents, wet paper strength enhancers, dry paper strength enhancers, water retention agents, and the like can be appropriately contained as necessary. .

In the present invention, the total number and configuration of the coating layer and the ink receiving layer provided on the support are not particularly limited. Further, the coating layer and the ink receiving layer may be provided on one side or both sides of the support.
In the present invention, when the ink receiving layer is provided on one side of the support, a coating layer may be provided on the surface of the support opposite to the ink receiving layer for the purpose of curling correction or improving transportability. It is. Furthermore, it is also possible to provide one or more coating layers between the ink receiving layer and the support. In this case, the composition of the layer is not particularly specified, but a layer containing a pigment, a hydrophilic binder, and a cationic resin as main components is preferable.

In the present invention, it is necessary that the coating amount (dry coating amount) of the ink receiving layer be ² to 10 g / m ² . Preferably from 3 to 8 g / ^{m 2.} If the coating amount of the ink receiving layer is less than ² g / m ² , the ink absorbability is reduced or solid spots are generated, which adversely affects ink jet printing performance. ^{On the other hand} , if it exceeds 10 g / m ² , the density of the recorded image decreases.
When a coating layer other than the ink receiving layer is provided between the support and the ink receiving layer, the entire coating layer (that is, the sum of the ink receiving layer and the other coating layers described above) provided on the support is applied. The work amount (dry coating amount) is preferably 30 g / m ² or less, more preferably 25 g / m ² or less. When the coating amount exceeds 30 g / m ² , the adhesive strength between the ink receiving layer and the support becomes a level that cannot be practically used, and peeling of the coating layer from the support, which is called powdering off, occurs. Problems arise.

  In the present invention, the ink receiving layer is provided on the support surface by a curtain coating method or a die coating method. The curtain coating method is a coating method in which the surface of the support is covered with a curtain film formed by freely dropping a coating liquid from a coater head or extruding it with a pump or the like.

  The curtain coating method is a pre-weighing type coating method. Before the coating on the support, the coating liquid has been weighed, and the curtain film is a free surface on both sides. One feature is that one side is stretched by contact with the support during the process to form a coating layer film, so that the flow path is not restricted during coating. That is, since the uniform liquid film is stretched to form a coating layer film, the coating layer has a very uniform thickness regardless of the shape of the support.

  Die coater measures before coating paint measured by the amount of pump or pressure tank, lip opening or clearance between the die head and the base paper onto the base paper or film supported by the backing roll. -It is a non-contact type coater, and the coating layer has a very uniform thickness. Compared with general coating equipment such as bar coater, blade coater, gravure coater, roll coater, air knife coater, etc., it can be coated even with a high concentration coating solution. It is possible to easily form an amount of the ink receiving layer, and there are advantages such as improvement in drying efficiency.

  As described above, the curtain coating method and the die coating method are the most suitable coaters for obtaining a coating layer having a uniform film thickness, and the state of the base paper (that is, the surface property) is poor, and unevenness is present. Even if it is large or wet, the ink-receiving layer can be applied without being affected by these.

In the present invention, it is not clear why an image having a high density and no unevenness is obtained when recording using a non-aqueous ink, but an ink receiving layer containing a synthetic amorphous silica having a specific oil absorption amount Is considered to be formed so that the thickness is uniform.
On the other hand, when a blade (bar blade) or air knife coating, which is a general coating apparatus, is used, there are the following problems. That is, since blade (bar blade) coating is easily affected by the surface properties (unevenness) of the base paper, when the unevenness of the base paper is large, the film thickness of the coating layer becomes non-uniform. In addition, in the case of a smooth base paper with few irregularities, a relatively good coating layer can be obtained, but there is a problem that streaks (streaky defects) frequently occur in operation.

In the case of air knife coating, since the coating liquid is scraped off with air, it can only be used for coating liquids with low viscosity, and such coating liquid can penetrate into the base paper. There are many matches. In particular, when using a base paper having good absorbency as in the case of the present invention, since the penetration of the coating liquid into the inside of the base paper is remarkable, in order to satisfy the final quality, the coating layer It is necessary to increase.
Also, in blade (bar blade) coating and air knife coating, after supplying an excess coating solution, the excess coating solution is scraped off with the blade (bar blade) or air, so that the unevenness of the base paper is filled. However, the film thickness of the coating layer becomes non-uniform.

  In the present invention, it is possible to prevent a problem called “back-through” that occurs when double-sided printing is performed by providing an ink receiving layer on both sides. The reason for this is not clear, but it is considered that the ink receiving layer formed by the curtain coating method and the die coating method is uniform, so that the colored pigment in the ink hardly penetrates into the base paper.

In the present invention, in order to provide a coating layer other than the ink receiving layer on the support surface, various blade coaters, bar blade coaters, roll coaters, air knife coaters, gate roll coaters, curtain coaters, which are general coating devices. Various apparatuses such as a short dwell coater, a gravure coater, a flexographic gravure coater, and a size press can be used on-machine or off-machine.
Further, in the present invention, after the ink receiving layer is applied, the ink receiving layer can be surface-treated with a calendar device such as a machine calendar, a super calendar, or a soft calendar.

<Non-aqueous ink>
The above-described ink jet recording paper is most suitable for ink jet recording using a non-aqueous ink mainly composed of a solvent, a dispersant, and a pigment. Although it can be used for ink jet recording using water-based ink or dye ink, the obtained image is somewhat inferior to ink-jet recording using non-aqueous pigment ink.

<Ink solvent>
Examples of the solvent include non-polar solvents such as aliphatic hydrocarbon solvents, alicyclic hydrocarbon solvents, and aromatic hydrocarbon solvents. Examples of the aliphatic hydrocarbon solvent and the alicyclic hydrocarbon-based solvent include “Teclean N-16, Teclean N-20, Teclean N-22, manufactured by Nippon Oil Corporation.
“No. 0 Solvent L, No. 0 Solvent M, No. 0 Solvent H, AF Solvent No. 4, AF Solvent No. 5, AF Solvent No. 6, AF Solvent No. 7”, “Naftezol L, Naphthezol M, Naphthezol” manufactured by Nippon Oil & Chemical Co., Ltd. H, Nisseki Isosol 300, Nisseki Isosol 400 "," IsoparG, Is "manufactured by ExxonMobil
oparH, IsoparL, IsoparM, ExxolD40, ExxolD80,
ExxolD100, ExxolD130, ExxolD140 "etc. can be illustrated.

As polar organic solvents, ester solvents, alcohol solvents, higher fatty acid solvents,
Ether solvents and mixed solvents thereof can be used. The polar organic solvent is selected from those that form a single phase when mixed with a solvent other than the polar organic solvent. In particular,
Methyl laurate, isopropyl laurate, isopropyl myristate, isopropyl palmitate, isostearyl palmitate, methyl oleate, ethyl oleate, isopropyl oleate, butyl oleate, methyl linoleate, isobutyl linoleate,
Ethyl linoleate, isopropyl isostearate, methyl soybean oil, isobutyl soybean oil,
Ester solvents such as tall oil methyl, tall oil isobutyl, diisopropyl adipate, diisopropyl sebacate, diethyl sebacate, propylene glycol monocaprate, trimethylolpropane tri-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate; isomyristyl alcohol Alcohol solvents such as isopalmityl alcohol, isostearyl alcohol, oleyl alcohol; higher fatty acid solvents such as isononanoic acid, isomyristic acid, hexadecanoic acid, isopalmitic acid, oleic acid, isostearic acid; diethyl glycol monobutyl ether, ethylene Ether solvents such as glycol monobutyl ether, propylene glycol monobutyl ether, propylene glycol dibutyl ether; It is exemplified as the.

<Dispersant>
The dispersant is not particularly limited as long as the colorant to be used is stably dispersed in the solvent, but it is preferable to use a polymer dispersant.
Specific examples of the dispersant include “Solsperse 5000 (phthalocyanine ammonium salt type), 13940 (polyesteramine type), 17000, 18 manufactured by Nippon Lubrizol Corporation.
000 (aliphatic amines), 22000, 24000, 28000 "; Efka CHE
“Fuka 400, 401, 402, 403, 450, 451, 453” manufactured by MICALS
(Modified polyacrylate), 46, 47, 48, 49, 4010, 4050, 4055 (
Modified polyurethane) ”;“ Demol P, EP ”manufactured by Kao Corporation,“ Poise 520, 521, 5 ”
30 ”,“ homogenol L-18 (polycarboxylic acid type polymer surfactant) ”;“ Disparon KS-860, KS-873N4 (amine salt of polymer polyester) ”manufactured by Enomoto Kasei Co., Ltd.
"Daicol Kogyo Seiyaku" Discall 202, 206, OA-202, OA-600 (multi-chain polymer non-ionic) "and the like.

<Pigment>
As the color pigment used in the ink, regardless of inorganic pigments or organic pigments, those generally used in the printing field can be used. Specifically, for example, carbon black, cadmium red, molybdenum red, chrome yellow, cadmium yellow, titanium yellow, chromium oxide, pyridian, cobalt green, ultramarine blue, Prussian blue, cobalt blue, azo pigment, phthalocyanine pigment Conventionally known pigments such as quinacridone pigments, isoindolinone pigments, dioxazine pigments, selenium pigments, perylene pigments, perinone pigments, thioindigo pigments, quinophthalone pigments, metal complex pigments are not particularly limited. Can be used. These pigments may be used alone or
Although it can be used in combination as appropriate, it is preferably contained in the range of 0.01 to 20% by mass relative to the whole ink.

  In addition, the non-aqueous pigment ink of the present invention includes, for example, linseed oil-modified alkyd resin, polystyrene, rosin resin, terpene for the purpose of improving the storage stability and adjusting the spread of ink dots on the recording medium. Add polar resins such as phenolic resins and alkylphenol-modified xylene resins, sequestering agents, surface tension modifiers, surfactants, viscosity modifiers, antifoaming agents, foam suppressors, mold release agents, foaming agents, penetration Additives such as additives, fluorescent brighteners, ultraviolet absorbers, preservatives, water-proofing agents, rheology modifiers and antioxidants can be contained in appropriate combinations.

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto. Further, “parts” and “%” shown in the examples indicate parts by mass and mass% unless otherwise specified.
<Example 1>
Base paper 30 parts of talc, 2 parts of cationized starch, 1 part of sulfuric acid band, and alkyl ketene dimer emulsion 0 per 100 parts of pulp obtained by beating bleached hardwood bleached kraft pulp and adjusting the freeness to 350 ml The slurry was prepared by adding 2 parts. Next, paper was made from the slurry by a long paper machine. Thereafter, a solution of 5% phosphoric esterified starch and 0.5% polyvinyl alcohol was applied to both sides of the base paper using a size press so that the dry weight was 3 g / m ^{2 on} both sides, and machine calendar treatment after drying Thus, a base paper having a basis weight of 80 g / m ² was produced.
Ink-receiving layer Amorphous silica (Mizukasil P-50, manufactured by Mizusawa Chemical Co., Ltd .: average secondary particle size 10 μm, oil absorption 170 ml / 100 g) 100 parts polyvinyl alcohol (PVA-117 Kuraray) 40 parts ethylene vinyl acetate Emulsion (Rikabond BE-7000, manufactured by Chuo Rika Kogyo Co., Ltd.) 20 parts styrene acrylic resin (Polymarlon 360, manufactured by Arakawa Chemical Co., Ltd.) 3 parts Polydiallyldimethylammonium chloride (PAS-H-10L, manufactured by Nitto Boseki) 5 parts Surfactant (Surfinol 104E Air Products) 0.5 parts antifoaming agent (SN deformer 480 San Nopco) 0.5 parts and dilution water, etc. added appropriately, a 20% solid content coating solution using a curtain coater. Apply ink jet recording paper on both sides of the base paper so that the amount is 5 g / m ² per side. Obtained.

<Example 2>
Inkjet recording was carried out in the same manner as in Example 1, except that the amorphous silica of the ink-receiving layer was changed to 100 parts by Mizukasil P-78A Mizusawa Chemical Industries: average secondary particle diameter 6 μm, oil absorption 250 ml / 100 g). Got the paper.

<Example 3>
An ink jet recording paper was obtained in the same manner as in Example 1 except that coating was performed using a die coater.

<Comparative Example 1>
An ink jet recording paper was obtained in the same manner as in Example 1 except that coating was performed using an air knife coater.

<Comparative example 2>
An inkjet recording paper was obtained in exactly the same manner as in Example 1 except that coating was performed using a bar blade coater.

<Comparative Example 3>
An ink jet recording paper was obtained in exactly the same manner as in Example 1, except that the coating amount per side was 1 g / m ² .

<Comparative example 4>
An ink jet recording paper was obtained in exactly the same manner as in Example 1, except that the coating amount per side was 11 g / m ² .

<Comparative Example 5>
The ink jet recording sheet was made in the same manner as in Example 1 except that the amorphous silica of the ink receiving layer was changed to 100 parts by Silojet ED5 Grace: average secondary particle size 8 μm, oil absorption 300 ml / 100 g). Obtained.

<Comparative Example 6>
An inkjet recording paper was obtained in exactly the same manner as in Comparative Example 5, except that the coating amount per side was 1 g / m ² .

  Examples 1 and 2 The ink jet recording papers obtained in Comparative Examples 1 to 6 were evaluated as follows, and the results obtained are shown in Table 1.

Evaluation method Each recording paper in the examples and comparative examples was evaluated by the following method. All printing was performed with ORPHIS HC 5000 (Risu Kagaku Kogyo Co., Ltd., oil-based pigment ink printer), and the printing mode was a photo priority / HC dedicated paper mat (high quality paper) mode. In each item, if the evaluation is Δ or more, it can be used without any problem.

Evaluation item <Color development>
Each solid image was printed for cyan, magenta, yellow, and black, and allowed to stand for 24 hours in an environment of 23 ° C. and 50% RH, and then the print density of each image area was measured with a reflection densitometer (MACBEATH RD194I).
○… The total value of four colors is 4.2 or more. Δ… The total value of four colors is 4 or more and less than 4.2.

<Ink absorbability>
After 100 red and green solid images were continuously printed on both sides, the white paper portion of the printed matter was checked for the presence of smudges and set-off.
○: The ink absorbs quickly, so no stains or set-offs occur.
Δ: Dirt and setback are almost inconspicuous, and the frequency of occurrence is negligible.
X: Since the ink absorbency is slow, the frequency of occurrence of dirt and set-off is high and the degree is severe.

<Betamura>
A solid cyan image was printed, and the uniformity of the image was sensory evaluated.

○: The solid image is uniform and no unevenness is observed. Δ: The uniformity of the solid image is high and almost no unevenness is observed. ×: The solid image is not uniform and unevenness is recognized.

<Back-through>
After printing a black solid image and leaving it at 23 ° C and 50% RH for 24 hours, the print density of the image area is measured from the opposite side of the paper with a reflection densitometer (MACBEATH RD194I) to evaluate the strikethrough. went.
○: The measured value is less than 0.10 Δ: The measured value is 0.10 or more and less than 0.15 ×: The measured value is 0.15 or more.

From Table 1, the ink jet recording paper produced in Examples 1, 2, and 3 has good color developability and ink absorbency when printed with oil-based pigment ink, and is excellent in image uniformity with no stickiness. It can be seen that the gap is small.
On the other hand, in Comparative Examples 1 and 2 that are not manufactured by the curtain or die coating method, the formation of the coating layer is not uniform, so that a sticky spot is generated and the back-through is also large. Comparative Example 3 with a small coating amount is insufficient in both color developability and ink absorbency, and although it is curtain coating, the coating amount is too low, and the coating layer is difficult to be uniform, and the occurrence of betham is also generated. And there is a lot of strikethrough. In Comparative Example 4 with a large coating amount and Comparative Example 5 using silica with a high oil absorption, the ink absorbability becomes excessive and the color developability is lowered. In addition, due to a decrease in color developability, uneven density in the solid portion is easily noticeable. Using silica with a high oil absorption amount, Comparative Example 6 with a low coating amount has a color development property and ink absorptivity at a practical level. There is a lot of strikethrough.

Claims (2)

An ink jet recording paper for recording using a non-aqueous ink comprising a solvent, a dispersant, and a pigment, wherein the ink jet recording paper is provided with an ink receiving layer mainly comprising a pigment and a binder on the surface of a support. The pigment is provided such that the coating amount is ² to 10 g / m ² by at least one coating method selected from a coating method or a die coating method, and the pigment contained in the ink receiving layer has an oil absorption amount of 150 to An ink jet recording paper comprising 250 ml / 100 g of synthetic amorphous silica. 2. The ink jet recording paper according to claim 1, wherein the ink receiving layer is provided on both sides of the support.