JP2001270225A - Ink jet recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording medium good in absorbability, high in chromaticity and excellent in the light fastness of a recorded image or character. SOLUTION: In the ink jet recording medium wherein an ink receiving layer is provided on a support, a transition metal oxide such as cerium oxide or the like, of which the surface is coated with amorphous silica, is added to the ink receiving layer and the transition metal oxide coated with amorphous silica has a mean secondary particle size of 2.0-8.0 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording medium, and more particularly, to an ink jet recording medium having good ink absorbency, high color development, and excellent light fastness of recorded images and characters. The present invention relates to an inkjet recording medium.

[0002]

2. Description of the Related Art The ink jet recording system is a system in which fine droplets of ink are caused to fly according to various operating principles and adhere to a recording medium such as paper to record images, characters, and the like. The ink jet recording method is rapidly spreading to various uses such as information equipment as an image recording device because of features such as high speed and low noise, easy colorization, and no need for development and fixing. Further, it is possible to obtain an image formed by a multicolor ink jet system, which is comparable to multicolor printing by a plate making system or photographic printing by a silver halide photographic system. In particular, when the number of copies is small, the method is cheaper than ordinary multicolor printing or a method using silver halide photography, and has been widely applied to the field of full-color image recording. Further, with the improvement of recording characteristics such as high-speed recording, high-definition, and full-color recording, recording devices and recording methods have been improved, and high characteristics have been required for recording media. Have been.

[0003] That is, as an ink jet recording medium, the ink absorption is rapid and the ink absorption capacity is large, the ink dot density is high, the color development is good, and the ink dots are not diffused in the horizontal direction. It is necessary to satisfy various requirements, such as not being larger than necessary, the periphery being smooth and not blurred, and the recorded image having sufficient resistance to oxidizing gas and light in water or air. Several proposals have hitherto been made to satisfy these requirements. For example, JP-A-53-49113 discloses an ink jet recording paper obtained by impregnating a paper made of wood pulp with a water-soluble polymer in order to improve absorbability and ink bleeding.

As an example of coated paper, Japanese Patent Application Laid-Open No. 55-583
No. 0, an ink jet recording sheet provided with an ink-absorbing coating layer on a support is disclosed in JP-A-55-11829. Each of the inkjet recording sheets provided with a coating layer is disclosed. JP-A-55-51583 discloses an example in which amorphous silica is used as a pigment in a coating layer. This recording material has various advantages such as excellent color development of the recording material as a recording material for ink jet recording.
In particular, when recording is performed with an ink using a direct dye, an acid dye, or a food coloring material as a recording material, the formed image has insufficient light fastness, and thus has the disadvantage of severe discoloration.

As disclosed in JP-A-61-57379, it is disclosed that silica is used in combination with magnesium sulfate or a water-soluble aluminum salt to improve the light fastness of an image. Since the above-mentioned components were dispersed or dissolved in water to form a recording material as a mixed coating liquid to which an adhesive as a binder was added, the effect of improving the light resistance of silica was hardly sufficient. . In recent years, JP-A-04-201594, as disclosed in JP-A-09-188066, cerium oxide, titanium oxide, containing at least one transition metal oxide such as zinc oxide, or a white pigment such as silica It is disclosed that the light fastness of an image can be improved by adhering to an image. However, these have a high catalytic activity because the transition metal oxide surface is exposed,
In addition, there was a problem that the ink absorption and the color development were poor.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording medium having good ink absorbency, high color, and excellent light fastness of recorded images and characters.

[0007]

Means for Solving the Problems The present inventors have conducted intensive studies on the above-mentioned problems in the ink jet recording medium, and as a result, in the ink jet recording medium having the ink receiving layer provided on the support, It has been found that the object can be achieved by using an inkjet recording medium containing a transition metal oxide whose surface is coated with amorphous silica. That is, by using the transition metal oxide coated with amorphous silica, the light resistance, which was a drawback of the prior art, was improved, and the ink absorption was hardly reduced.

It is preferable that the transition metal oxide coated with the amorphous silica is at least one selected from the group consisting of cerium oxide, zinc oxide and titanium oxide.

It is more preferable that the transition metal oxide coated with the amorphous silica has an average secondary particle diameter of 2.0 μm or more and 8.0 μm or less.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The inkjet recording medium of the present invention, on a support, a transition metal oxide coated with amorphous silica, other pigments,
And a binder.

The transition metal oxide coated with amorphous silica in the ink jet recording medium of the present invention has a lower catalytic activity than the uncoated transition metal oxide.
It is characterized by high safety and excellent ultraviolet absorption and shielding effects. The transition metal oxide coated with the amorphous silica has a composition ratio of the transition metal oxide to the amorphous silica of 70:30 or more and 40:60 or less, and the average primary particles of the transition metal oxide have a high magnification transmission type. In the measurement by an electron micrograph, those having a thickness of 3 nm or more and 60 nm or less are preferable.

The method for producing the transition metal oxide coated on the amorphous silica is preferably a dry method or a wet method. In the dry method, the transition metal oxide and the amorphous silica fine particles are mixed, the amorphous silica is mixed while the transition metal oxide is agitated and mixed, or the amorphous silica powder, its dispersion, etc. are sprayed by a spray method or the like. There is a method in which amorphous silica is uniformly attached to the transition metal oxide by addition.

On the other hand, in the wet method, a transition metal oxide is dispersed in an organic dispersion medium using a dispersant, and an alkoxysilane or an alkylalkoxysilane or a low polymer thereof is subjected to a gelling reaction in this dispersion system. It is a way to make it.

The transition metal oxide is at least one selected from the group consisting of cerium oxide, zinc oxide, titanium oxide and yttrium oxide, and more preferably cerium oxide, zinc oxide and titanium oxide. The transition metal oxide coated with amorphous silica preferably has an average secondary particle diameter of 2.0 μm or more and 8.0 μm or less as measured by a laser method. If the average secondary particle diameter of the transition metal oxide coated with amorphous silica is less than 2.0 μm, the desired light fastness cannot be obtained, which is not preferable. Print density is not obtained.

As the transition metal oxide coated with such amorphous silica, a commercially available one can be used.
For example, Serigard SC4060 (Nippon Inorganic Chemical Industry Co., Ltd.)
Serigard SC6832 (Nippon Inorganic Chemical Industry Co., Ltd.)
Manufactured).

The amount of the transition metal oxide coated with the amorphous silica is preferably from 5 parts by weight to 90 parts by weight based on 100 parts by weight of the total amount of the pigment constituting the ink receiving layer, in accordance with the amount of ink absorbed. used. If the amount is less than 5 parts by weight, no effect can be expected. If the amount exceeds 90 parts by weight, the ink absorption amount is reduced, and the color developing properties, particularly, the image density are undesirably reduced. It is more preferably at least 10 parts by weight and at most 80 parts by weight.

The ink receiving layer can exhibit light fastness by coating so that the transition metal oxide coated with the amorphous silica is 0.5 g / m ² or more.
Known pigments can be applied in combination with the transition metal oxide coated with the amorphous silica.

The support used in the present invention is LBK.
Chemical pulp such as P, NBKP, GP, PGW, RMP, TMP, CTMP, CM
Mechanical pulp such as P, CGP, wood pulp such as waste paper pulp such as DIP, and conventionally known pigments as main components, as binders and sizing agents, fixing agents, yield improvers, cationizing agents, paper strength enhancers, etc. Mixing using one or more kinds of various additives, base paper manufactured by various devices such as Fourdrinier paper machine, circular net paper machine, twin wire paper machine, etc., further base paper, size press with starch, polyvinyl alcohol etc. and anchor Examples include base paper provided with a coat layer, and coated paper such as art paper, coated paper, and cast coated paper provided with a coat layer thereon. The ink receiving layer according to the present invention may be directly provided on such a base paper and a coating layer, or a calendar device such as a machine calendar, a TG calendar, or a soft calendar may be used for the purpose of controlling flattening. .

As the support, a polyolefin resin layer may be provided on the above-mentioned base paper,
Polypropylene, polyester, nylon, rayon,
It is also possible to apply the present invention to a film material of a synthetic resin such as polyurethane or a mixture thereof, or a sheet formed by forming the synthetic resin into fibers.

One or more known white pigments can be used as the pigment used in the present invention other than the above-mentioned pigments to be incorporated in the support or the ink receiving layer. For example, light calcium carbonate, heavy calcium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, magnesium carbonate , Synthetic amorphous silica, alumina, alumina hydrate, aluminum hydroxide, lithopone,
White inorganic pigments such as zeolites, hydrohaloysite, magnesium hydroxide, styrene-based plastic pigments,
Organic pigments such as acrylic plastic pigments, polyethylene, microcapsules, urea resins, melamine resins, and the like. In particular, a porous inorganic pigment is preferable for the ink receiving layer, and examples thereof include porous synthetic amorphous silica, porous magnesium carbonate, and porous alumina hydrate.

It is also possible to apply a back coat layer to impart curl aptitude, and as the pigment at that time, a flat pigment or hydrohaloysite is preferable.

The ink-receiving layer used in the present invention may contain a water-soluble polymer compound as an adhesive. The polymer compound used in the present invention is a compound having an affinity for ink as a component of the ink receiving layer. For example, as the water-soluble polymer compound, polyvinyl alcohol or a derivative thereof, an acrylic resin, a styrene-acrylic copolymer, a maleic anhydride polymer, a styrene-maleic anhydride copolymer, an ethylene-vinyl acetate copolymer, starch, Polyvinyl butyral, gelatin, casein, ionomer, gum arabic, carboxymethyl cellulose, alginic acid, sodium alginate, pullulan, polyvinyl pyrrolidone, polyacrylamide, polyethylene glycol, polypropylene glycol and the like. Preferably, polyvinyl alcohol or a derivative thereof is used.

These polymer compounds may be used alone or in combination of two or more, and 2% by weight or more and 70% by weight or less are added to 100% by weight of the total amount of the pigment in the ink receiving layer. Preferably, it is 5% by weight or more and 50% by weight or less. If the amount is less than the above range, the strength of the coating film becomes weak, and if it is too large, the ink absorbency decreases.

Further, other additives include a cationic dye fixing agent, a pigment dispersant, a thickener, a fluidity improver, a viscosity stabilizer, a pH adjuster, a surfactant, an antifoaming agent, a foam inhibitor, Release agents, foaming agents, penetrants, coloring dyes, coloring pigments, optical brighteners, ultraviolet absorbers, antioxidants, leveling agents, preservatives, anti-binders, water-proofing agents, wet paper strength agents, drying A paper strength enhancer and the like can be appropriately added as long as the object of the present invention is not impaired.

When the ink receiving layer is provided, the method of coating is not particularly limited, and a known coating method can be used. For example, various devices such as conventionally known air knife coaters, curtain coaters, slide lip coaters, die coaters, blade coaters, gate roll coaters, bar coaters, rod coaters, roll coaters, bill blade coaters, short dwell blade coaters, size presses, and the like. Can be applied onto the support. Further, after coating, finishing may be performed using a calendar such as a machine calendar, a TG calendar, a super calendar, and a soft calendar.

The ink referred to in the present invention is a recording liquid comprising the following dyes, solvents, and other additives. As the dyes, for example, those having good coloring properties, sharpness, stability, and the like can be used.
CIDirect Yellow 12, CIDirect Yellow 24, CIDire
ct Yellow 26, CIDirect Yellow 44, CIDirect Yello
w 86, CIDirect Yellow 98, CIDirect Yellow 100, C.
I.Direct Yellow 142, CIDirect red 1, CIDirect re
d 4, CIDirect red 17, CIDirect red 28, CIDirect
red 83, CIDirect Orenge 34, CIDirect Orenge 39,
CIDirect Orenge 44, CIDirect Orenge 46, CIDire
ct Orenge 60, CIDirect Violet 47, CIDirect Viole
t48, CIDirect Blue 6, CIDirect Blue 22, CIDire
ct Blue 25, CIDirect Blue 71, CIDirect Blue 86,
CIDirect Blue 90, CIDirect Blue 106, CIDirect
Blue 199, CIDirect Black 17, CIDirect Black 19,
CIDirect Black 32, CIDirect Black 51, CIDirect
Black 62, CIDirect Black 71, CIDirect Black 10
8, direct dyes such as CIDirect Black 146, CIDirect Black 154, CIAcid Yellow 11, CIAcid Yellow 17, C.I.
I.Acid Yellow 23, CIAcid Yellow 25, CIAcid Yello
w 29, CIAcid Yellow 42, CIAcid Yellow 49, CIAci
d Yellow 61, CIAcid Yellow 71, CIAcid red1, CIA
cid red 6, CIAcid red 8, CIAcid red 32, CIAcid
red 37, CIAcidred 51, CIAcid red 52, CIAcid red
80, CIAcid red 85, CIAcid red 87, CIAcid red 9
2, CIAcid red 94, CIAcid red 115, CIAcid red 18
0, CIAcid red 256, CIAcid red 317, CIAcid red 3
15, CIAcid Orenge 7, CIAcidOrenge 19, CIAcid Vi
olet 49, CIAcid Blue 9, CIAcid Blue 22, CIAcid
Blue 40, CIAcid Blue 59, CIAcid Blue 93, CIAcid
Blue 102, CIAcid Blue104, CIAcid Blue 113, CIA
cid Blue 117, CIAcid Blue 120, CIAcid Blue167, C.
I.Acid Blue 229, CIAcid Blue 234, CIAcid Blue 25
4, CIAcid Black 2, CIAcid Black 7, CIAcid Black
24, CIAcid Black 26, CIAcid Black31, CIAcid Bl
ack 52, CIAcid Black 63, CIAcid Black 112, CIAc
acid dyes such as id Black118, other basic dyes,
A water-soluble dye such as a reactive dye or a food colorant, or a pigment such as carbon black can be used.

Examples of the solvent for the ink include water and various water-soluble organic solvents such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, and isobutyl. Alkyl alcohols having 1 to 4 carbon atoms such as alcohol; amides such as dimethylformamide and dimethylacetamide; ketones or ketone alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; polyethylene glycol and polypropylene glycol Polyalkylene glycols; ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1, 2, 6
Alkylene glycols having 2 to 6 alkylene groups, such as hexanetriol, thiodiglycol, hexylene glycol, diethylene glycol; and many such as glycerin, ethylene glycol methyl ether, diethylene glycol methyl (or ethyl) ether, and triethylene glycol monomethyl ether. And lower alkyl ethers of polyhydric alcohols.

Among the above water-soluble organic solvents, polyhydric alcohols such as diethylene glycol, and lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl ether and triethylene glycol monoethyl ether are particularly preferably used. In addition to the above water-soluble organic solvents, flammable represented by high-boiling aliphatic hydrocarbons, there may be used non-water-soluble insulating solvent excellent in safety such as toxicity, various inorganic pigments, organic pigments and the like May be used as a dye.

Other additives to be added to the ink include, for example, a pH adjuster, a sequestering agent, an antioxidant,
Examples include a fungicide, a viscosity modifier, a surface tension modifier, a wetting agent, a surfactant, and a rust inhibitor.

[0030]

EXAMPLES The present invention will be described below with reference to examples of the present invention, but the present invention is not limited to these examples. Further, “parts” and “%” shown in the examples are parts by weight and% by weight unless otherwise specified.

<Preparation of support> Hardwood bleached kraft pulp (LBKP) and softwood bleached sulphite pulp (NBSP):
One mixture was beaten to 300 ml with Canadian Standard Freeness to prepare a pulp slurry. As a sizing agent, alkyl ketene dimer to pulp is 0.5% by weight, polyacrylamide is 1.0% by weight to pulp, cationized starch is 2.0% by weight to pulp, and polyamide epichlorohydrin resin is a sizing agent. 0.5% by weight of pulp was added and diluted with water to obtain a 1% slurry. The slurry was paper-made with a fourdrinier paper machine so as to have a basis weight of 85 g / m ^2, and was used as a support.

<Amorphous Silica-Coated Transition Metal Oxide Dispersion
Preparation of A> Cerium oxide coated with amorphous silica (Serigard SC
4060: manufactured by Nippon Inorganic Chemical Co., Ltd., 100 parts of an average secondary particle diameter of 4.8 μm) was dispersed in 300 parts of dispersing water to prepare an amorphous silica-coated transition metal oxide dispersion A.

<Amorphous Silica-Coated Transition Metal Oxide Dispersion
Preparation of B> Amorphous silica-coated cerium oxide instead of amorphous silica-coated cerium oxide used in amorphous silica-coated transition metal oxide dispersion A (Serigard SC6832: Nippon Inorganic Chemical, average secondary particle diameter 8 μm) Was used to prepare an amorphous silica-coated transition metal oxidation dispersion B.

<Amorphous Silica-Coated Transition Metal Oxide Dispersion
Preparation of C> Gas-phase method fine particle silica (Nippon Aerosil Co., Ltd.) with a primary particle diameter of 7 nm and 40 parts of fine particle titanium oxide (rutile type, manufactured by Sakai Chemical Industry Co., Ltd.) having an average secondary particle diameter of 0.2 μm or more and 0.5 μm
After 0 parts were pulverized and dispersed by a sand grinder, 300 parts of dispersion water was added to the mixture further pulverized and dispersed by a pressure homogenizer, and the mixture was stirred and mixed. Amorphous silica-coated transition metal oxide dispersion C (average secondary particle diameter 3.2 μm )created.

<Amorphous Silica-Coated Transition Metal Oxide Dispersion
Preparation of D> Fine particle zinc oxide having an average secondary particle diameter of 0.3 μm (Zinc Hua No. 1; manufactured by Mitsui Mining & Smelting Co., Ltd.) in 32 parts and a primary particle diameter of 7 nm
68 parts of silica by gas phase method (made by Nippon Aerosil Co., Ltd.) is pulverized and dispersed by a sand grinder, and further pulverized and dispersed by a pressure homogenizer, 300 parts of dispersion water is added, and the mixture is stirred and mixed to form a transition metal coated with amorphous silica. Oxide dispersion D
(Average secondary particle diameter: 6.4 μm).

<Amorphous Silica-Coated Transition Metal Oxide Dispersion
Preparation of E> Sand-grinder grinding of 68 parts of gas-phase method fine-particle silica (Nippon Aerosil Co., Ltd.) with a primary particle diameter of 7 nm in 32 parts of fine yttrium oxide (reagent: Junsei Chemical Co., Ltd.) with an average secondary particle diameter of 1.3 μm After the dispersion, 300 parts of dispersion water was added to the mixture further pulverized and dispersed by a pressure homogenizer, followed by stirring and mixing to prepare an amorphous silica-coated transition metal oxide dispersion E (average secondary particle diameter: 7.6 μm).

<Ink receiving layer coating liquid 1> The coating liquid for the ink receiving layer was 90 parts of amorphous silica having a BET specific surface area of 270 m ² / g (Fine Seal X-37B: manufactured by Tokuyama Co.), transition to amorphous silica coating The metal-coated oxide dispersion A was mixed with 10 parts of solid content, 30 parts of polyvinyl alcohol (PVA117: manufactured by Kuraray Co., Ltd.) and 20 parts of a cationic dye fixing agent (Sumiretz 1001: manufactured by Sumitomo Chemical Co., Ltd.). did.

<Ink receiving layer coating liquid 2> In place of the amorphous silica-coated transition metal oxide A of the ink receiving layer coating liquid 1,
A coating liquid 2 was prepared using the amorphous silica-coated transition metal oxide dispersion B.

<Ink receiving layer coating liquid 3> In place of the amorphous silica-coated transition metal oxide A in the ink receiving layer coating liquid 1,
The coating liquid 3 was prepared using the amorphous silica-coated transition metal oxide dispersion C.

<Ink receiving layer coating liquid 4> In place of the amorphous silica-coated transition metal oxide A of the ink receiving layer coating liquid 1,
A coating liquid 4 was prepared using the amorphous silica-coated transition metal oxide dispersion D.

<Ink receiving layer coating liquid 5> In place of the amorphous silica-coated transition metal oxide A of the ink receiving layer coating liquid 1,
The coating liquid 5 was prepared using the amorphous silica-coated transition metal oxide dispersion E.

<Ink receiving layer coating liquid 6> The ink receiving layer coating liquid 6 is 100 parts of amorphous silica (Fine Seal X-37B: manufactured by Tokuyama Corporation) having a BET specific surface area of 270 m ² / g, and polyvinyl alcohol (PVA117: 30 parts of Kuraray Co., Ltd.) and 20 parts of cationic dye fixing agent (Sumiletz 1001: Sumitomo Chemical Co., Ltd.) are mixed,
Coating liquid 6 was obtained.

<Ink receiving layer coating liquid 7> The coating liquid for the ink receiving layer was 96 parts of amorphous silica having a BET specific surface area of 270 m ² / g (Fine Seal X-37B: manufactured by Tokuyama Corporation) having an average particle diameter of 8 nm. Cerium oxide (Needral U-15; manufactured by Taki Kagaku) 4
Part, polyvinyl alcohol (PVA117: Kuraray) 30
And 20 parts of a cationic dye fixing agent (Sumiretz 1001: manufactured by Sumitomo Chemical Co., Ltd.) to obtain a coating liquid 7.

The coating was performed by applying a coating solution shown in Table 1 on the above-mentioned support using a wire bar so as to have a dry coating amount of 8 g / m ² and dried.

<Evaluation of light fastness>
To the inkjet printer (Made by EPSON, M
J-700V2C) solid ink of Y, M, C, Bk ink
Character. These inkjet recording sheets,
Xenon arc fade meter, Atlas Ci-3
5f, black panel temperature 63 ° C, relative humidity 65
Magenta before and after 30 hours of light irradiation in a% RH environment
The color difference of the ink colors was measured. Color difference ΔE ^*Is L^*, A^*,
b^*Sample before and after light irradiation according to (CIE1976)
Based on the result of measuring the color of
it can. The larger the color difference, the more color degradation
If the color difference is less than 3.0, the difference in color is visually large.
There is no difference.

[0046]

１E ^* = ｛(△ L ^* ) ² + (△ a ^* ) ² + (△ b ^* ) ² ｝ ^1/2 where こ こ E ^* is the color difference, △ L ^* and △ a ^* Δb ^* is L ^* before and after light irradiation and the difference between a ^* and b ^* , respectively. The results were evaluated as ○ when ΔE ^* was less than 3.0, Δ when ΔE ^* was 3.0 or more and less than 7.0, and × when ΔE ^* was 7.0 or more.

<Evaluation of ink absorptivity> On the other hand, the evaluation of the ink absorptivity was performed by printing a heavy-color rectangular pattern with cyan ink and magenta ink using BJC-420J manufactured by Canon Inc. which is an ink jet recording apparatus. The boundary between the print pattern and the unprinted area is defined according to the following criteria.
It was evaluated visually. A: No bleeding is observed at the boundary part B: Slight bleeding is partially detected at the boundary part C: Slight bleeding is observed at the boundary part D: Remarkable bleeding is observed at the boundary part The evaluation of A or B indicates that the ink absorbability is good.

<Evaluation of Image Color> Canon BJC-42
Solid printing of magenta and cyan was performed using 0J. The color was visually evaluated as follows. A: Good color and no dullness. B: Good color, slightly dull, but practically no problem. C: Looks somewhat dull. D: The color is rough and dull. It is the rating of A or B that shows good image color.

[0049]

[Table 1]

As can be seen from Table 1, in Examples (1 to 5) in which the transition metal oxide coated with amorphous silica was used for the ink receiving layer, all of the ink absorption, image color and light fastness were excellent in a well-balanced manner. However, when the ink receiving layer is an ink receiving layer containing no transition metal oxide (Comparative Example 1), such as an ordinary ink jet paper, the transition metal oxide having no light resistance and having no silica coating is obtained. In the case of the ink receiving layer containing (Comparative Example 2), the ink absorbency and the image color are deteriorated.

[0051]

As described above, according to the present invention,
It is possible to provide a well-balanced ink jet recording medium having excellent ink absorbency and image color, and having sufficient image light resistance.

Claims (3)

[Claims] 1. An ink jet recording medium comprising an ink receiving layer provided on a support, wherein the ink receiving layer contains a transition metal oxide whose surface is coated with amorphous silica. . 2. The ink jet recording medium according to claim 1, wherein the transition metal oxide coated with the amorphous silica is at least one selected from the group consisting of cerium oxide, titanium oxide and zinc oxide. 3. The ink jet recording medium according to claim 1, wherein the transition metal oxide coated with the amorphous silica has an average secondary particle diameter of 2.0 μm or more and 8.0 μm or less.