JPS62242574A - Recording material and recording method using it - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Application in IT Industry) The present invention relates to recording materials suitable for recording methods using ink, such as felt-tip pens, fountain pens, pen plotters, and inkjet recording devices, particularly those that absorb ink. The present invention relates to a recording material with excellent color properties and recorded images, and a recording method for obtaining high quality recorded images with excellent operability.

(Prior Art) Conventionally, recording methods using ink, such as writing with a fountain pen, felt-tip pen, ballpoint pen, etc., pen plotter,
Examples of the recording material used for recording with an inkjet recording apparatus include general paper such as high-quality paper, pound paper, and writing paper, and coated paper such as art paper and cast coated paper.

However, in recent years, with the development of recording devices such as inkjet recording devices and pen plotters, sufficient recording characteristics have not been obtained with the above-mentioned conventional recording materials.

In other words, in recent recording methods such as those described above, high-speed recording and multi-color recording are performed that are incomparable to conventional methods.
With conventional recording materials, ink absorption, color development when a plurality of inks are attached to the same cylinder, chromaticity, etc. have not reached a satisfactory level.

In order to solve these problems, coated paper having a porous ink-absorbing layer on the surface of the base material, such as inkjet paper, has been devised.
Japanese Patent No. 214989 describes a sheet having a porous ink-absorbing resin layer provided on a base material.

This ink absorption layer is porous and contains pores and cracks inside, which improves the ink absorption speed.

In this way, by providing a porous ink absorption layer,
Although it is possible to increase ink absorption to some extent,
Since the absorption layer is porous, the recording material has light diffusing properties, making it impossible to obtain clear recorded images with high optical density and glossy recorded images.

In addition, since the recorded image is observed from the ink recording surface, a configuration is adopted in which the recording agent remains on the surface of the absorbent layer as much as possible, but 1) the durability and storage stability of the image, such as water resistance and abrasion resistance, are inferior. There are drawbacks.

As one method for solving such problems, a recording medium disclosed in, for example, Japanese Unexamined Patent Publication No. 136480/1980 is known. This recording medium has at least one ink-receiving layer with high whiteness provided on the support,
The formed image is observed from the support side. In this method, various performances such as water resistance on the observation surface have been sufficiently resolved, but a large number of pigments are used to increase the zero degree of the ink receiving layer, and as a result, although the self-receiving layer is high, it does not adhere to the surface. The ink is absorbed by the pigment.

Since less of the ink reaches the interface between the ink-receiving layer and the support, the image density on the observation surface cannot be made sufficiently high, and the color properties and resolution are also poor.

In addition, recently, as the speed and quality of recording using inkjet recording devices, pen plotters, etc. has increased, there has been a demand for recording materials with dramatic recording performance.

In other words, there is a need for recording materials that are significantly superior to conventional recording materials in all aspects of recording performance, including ink absorption, recording agent color development, recorded image quality, resolution, color, recorded image density, and gloss. It's here.

As a result of research to provide a recording material as described in "2," the present inventor has developed a specific configuration having a liquid-permeable ink transport layer and an ink retention layer, and in which a recording surface and an image observation surface are in a front-back relationship. We have previously proposed a recording material for this purpose.

However, in the recording materials of these prior inventions,
The correlation between various required performances, such as the ink absorbency of the formed ink transport layer, its strength, its relationship with the ink holding layer, and its relationship with the quality of the formed image, is not clear, and there are certain performance trends.
For example, if the thickness of the ink transport layer is increased to improve ink absorption, the image density will decrease, and if it is thinned, the resolution will decrease. If too many particles are added, cracks may occur in the ink transport layer and powder may fall off too much, and if too few particles are added, the ink absorption will be poor!・Various problems arose, such as the issue of overtime.

Therefore, the above-mentioned recording materials exhibit excellent ink absorption, water resistance, blocking resistance, etc. during recording, and after recording, they exhibit image quality such as excellent color, high image density, and resolution. There is a demand for a recording material that can provide an image that has the same characteristics as those described above.

In particular, as recording speeds increase, it is extremely inconvenient for recording materials to block each other, and if recording materials that are prone to blocking are used, paper feeding within the recording device will be disrupted or become impossible. A serious problem arises;
Further, after recording, a fatal problem arises in that the recorded image is damaged or destroyed due to blocking.

(Problems to be Solved by the Invention) However, at present, a recording material that simultaneously satisfies all of these recording characteristics has not yet been obtained.

Accordingly, an object of the present invention is to provide a recording material which has a moderate gloss on its surface and which allows recording images with excellent optical density to be obtained with good operability.

A further object of the present invention is to provide a recording material from which recorded images can be obtained that are excellent in water resistance, abrasion resistance, storage stability, visibility, and the like.

Another object of the present invention is to provide high image quality without causing problems such as blocking when storing or recording a recording material, and without causing problems such as blocking even after recording.
It is an object of the present invention to provide a recording method for easily obtaining a recorded image excellent in high optical density.

The objects described in the following are achieved by the present invention.

(Chief role for solving problems) That is, the first invention has an ink transport layer and an ink retention layer, and 11. The recording material is characterized in that its surface has an uneven shape.

Furthermore, a second aspect of the present invention is a recording method for recording with ink on the recording surface of a recording material having an ink transport layer and an ink holding layer, the surface of the recording material having an uneven shape. This recording method is characterized by:

(Function) Unlike conventional recording materials in which the recording surface and the observation surface are the same, the recording material of the present invention has the recording surface and the observation surface facing each other, and at least one of the surfaces is uneven. Its main feature is that it has a shape.

That is, in the recording material of the present invention, recording is basically performed using ink on the ink transport layer, which is the recording side, and the recorded image is observed from the ink retention layer side, which is the observation side. At least one surface of the recording material has an uneven shape.

The ink transport layer, which is the first feature of the present invention, has liquid permeability and has the function of quickly absorbing and transmitting ink attached to its surface, while the ink retaining layer transfers the ink from the ink transport layer. It has the function of absorbing and retaining ink or recording material.

At this time, the ink transport layer must have high affinity for the liquid medium in the ink.

On the contrary, it must have a low affinity for recording agents (coloring agents such as dyes and pigments, and materials with color-forming properties).

Therefore, the ink transport layer is constructed by selecting a material that has properties such as wetting, penetration, and diffusion for the ink medium, but does not have properties such as adsorption, penetration, and reaction for the recording material. There must be.

The ink retaining layer, which is the second feature of the present invention, must have a stronger ability to absorb ink than the ink transport layer in order to stably absorb and capture the ink temporarily absorbed by the ink transport layer.

Therefore, the ink retaining layer must have high affinity for the recording agent as well as for the ink medium.

The third feature of the present invention is that the recording material having the above-mentioned structure has an uneven shape on the recording surface or the observation surface, or both.

That is, the surface area of the recording surface is expanded by giving the recording surface a fine uneven shape of +1, and +t'7. The absorption of the ink is accelerated, and blocking between recording materials before and after recording is effectively prevented.

On the other hand, when an uneven shape is imparted to the observation surface, when observing a recorded image, excessive gloss of the image can be adjusted, so that the so-called texture is eliminated, and a soft and calm visual sensation can be obtained. The same probing prevention effect as above is exhibited.

When an uneven shape is provided on both sides, the above-mentioned effects on the recording surface and the viewing surface are exhibited simultaneously.

The present invention will be explained in more detail below based on preferred embodiment 1B.

The unreleased recording material 1 is a base material as a support.

an ink retaining layer formed on the base material that substantially absorbs and captures ink or recording material; and an ink retaining layer formed on the ink retaining layer that directly receives ink and has liquid permeability It is composed of an ink transport layer in which no recording material remains and an uneven shape provided on at least one of such recording materials.

However, if the ink transport layer or the ink retention layer also functions as a base material, the base material is not necessarily required.

As the base material used in the present invention, any conventionally known base material can be used, and specifically, polyester resin, diacetate resin, triacetate resin, polystyrene resin, polyethylene resin, polycarbonate resin, polymethacrylate resin, cellophane, celluloid. , plastic films such as polyvinyl chloride resin, polyimide resin, plates, glass plates, etc. The thickness of these base materials may be any thickness, but generally 1 μm to 5.000 I
It is about Lm.

These base materials can be provided with an uneven shape in advance on the surface that is the outer side of the recording material, or such an uneven shape may be provided when the recording material is completed.

Furthermore, by adding an uneven shape to the surface on which the ink retaining layer is to be formed,
It is also possible to improve the adhesion between the base material and the ink retaining layer.

As a method for imparting the uneven shape, any conventionally known method such as an embossing roll method, a sandblasting method, a press working method, a molding method, an etching force method, a sanding method, etc. can be used.

Furthermore, an uneven shape may be formed by such a method at the time of preparation of these base materials.

The uneven shape may be a regular pattern or an irregular pattern, but an irregular pattern is more suitable because it does not cause moire phenomenon.
It's so sad.

The size of the uneven shape is arbitrary from the size of ILm to the size of mm, but it is preferable that the surface roughness (maximum height) according to JISB0601 is 38 to 35S. .

When an uneven shape is imparted to the IT observation surface (substrate surface) in this way, excessive gloss of the image can be adjusted when observing the recorded image, and the so-called texture is eliminated, creating a soft and calm visual sensation.・I can get it.

Further, the blocking effect of the recording material is exhibited during recording and before and after recording.

As mentioned above, 1) In the present invention, since the recorded image is observed from the side opposite to the recorded side, the base material needs to have light-transmitting properties.

In addition, as long as the base material used has an IN-transparent property, it is possible to provide the above-mentioned uneven shape to the base material.

Any processing may be applied to the base material, for example, a desired pattern, appropriate gloss, or silk pattern may be applied to the base material. Furthermore, by selecting a base material that has water resistance, abrasion resistance, etc., it is also possible to impart water resistance, abrasion resistance, etc. to the image observation surface of the recording material.

The ink transport layer constituting the recording material of unreleased 11 must have at least liquid permeability. In the present invention, liquid permeability means that the ink can pass through the ink quickly and the ink can be absorbed into the ink transport layer. A preferred embodiment for improving the liquid permeability of the ink transport layer, which refers to the property of not substantially leaving the recording agent therein, is to use a porous structure having claw rings or communicating holes inside the ink transport layer. It is something that will make you feel better.

Further, as described above, in the present invention, in order to observe a reflective recorded image from the opposite side of the recording surface, it is preferable that the ink transport layer has light diffusing properties.

The ink transport layer that satisfies the characteristics described in -1- is preferably composed of IE particles that are non-stainable to the recording material and a binder.

Such particles include the recording agent in the ink, that is,
Any particles may be used as long as they do not substantially adsorb dyes, etc., and particularly suitable particles in the present invention include highly hydrophobic thermoplastic resins, thermoplastic resins, etc., since dyes in inks are generally water-soluble. Organic pigments such as curable resins, e.g. polystyrene.

Polymethacrylate, elastomer, ethylene-vinyl acetate polymer, styrene-acrylic copolymer, polyester, polyacrylic, polyvinyl ether, polyamide,
At least one of resin powders such as polyolefin, guanamine, and SBR, and their emulsions and suspensions may be used as desired.

In addition, in order to increase the zero degree of the ink transport layer, white fluoride 1 may be added to an extent that does not impede the ink permeability of the ink transport layer.

Further, the binder used has a function of binding the particles to each other and/or to the ink retaining layer, and is preferably non-staining to the recording material like the particles.

Preferred materials for the binder include any conventionally known materials as long as they have the above-mentioned functions.For example, polyvinyl alcohol, acrylic resin, styrene, etc.
Acrylic copolymer, ethylene-vinyl acetate copolymer, starch, polyvinyl butyral, gelatin, casein,
Ionomer, arabic rubber, carboxymethylcellulose, polyvinylpyrrolidone, polyacrylamide,
One or more of resins such as phenol, melanin, epoxy, styrene-butadiene rubber, urea resin, phenol resin, α-olefin resin, chloroprene, and nitrile rubber can be used as desired.

Furthermore, in order to improve the function as an ink transport layer, various additives such as surfactants, penetrants, etc. may be added to the ink transport layer as necessary.

The mixing ratio (gravity ratio) of the particles and the binder is preferably in the range of 1 particle/binder = 1/3 to 50/l, more preferably in the range of 3/l to 20/l. be. If there is too much binder in this mixing ratio, the ink transport layer will have fewer cracks and communicating pores, reducing the ink absorption effect. The adhesion between the retention layer and the particles disappears in -1 min, making it impossible to form an ink transport layer.

The thickness of the ink transport layer also depends on the ink droplet acid, &
T is preferably 1 to 200 ILm, and 1) 1F is preferably 3 to 50 ILm.

+1 unevenness on the ink transport layer (recording surface) as shown below.
This can be carried out by the method described above after forming the ink transport layer, and by using a relatively large number of particles within the above preferred range when forming the ink transport layer, the ink transport layer can be improved. Fine irregularities on the order of microns can be formed in the layer by particles. Further, by changing the particle size of the particles used, the size of the uneven shape can be freely changed. The preferred surface roughness is the same as described above.

In this way, the surface area of the recording surface is expanded by forming the fine unevenness 2 on the recording surface (ink transport R).
Absorption of +fl- ink is accelerated, and blocking between recording materials before and after recording is effectively prevented.

Next, the non-porous ink retention layer that substantially captures the ink or recording agent absorbs and captures the recording agent in the ink that has passed through the ink transport layer, and substantially permanently retains the recording agent.

The ink retaining layer needs to have a stronger ink absorption ability than the ink transport layer. This is because when the absorption power of the ink retention layer is weaker than the absorption strength of the ink transportation layer, the ink applied to the surface of the ink transportation layer passes through the ink transportation layer, and the tip of the ink reaches the ink retention layer. When the ink reaches the ink, the ink stays in the ink transport layer, so that the ink permeates and diffuses laterally within the ink transport layer at the interface between the ink transport layer and the ink retention layer. As a result, the resolution of the recorded image decreases, making it impossible to form a high-quality recorded image.

Also, as mentioned above, the recorded image can be viewed from the side opposite to the recording surface.
01, the ink retaining layer is preferably light-transmissive.

The ink retaining layer that satisfies the requirements in item 1- is preferably made of a light-transparent resin that adsorbs the recording agent and/or a light-transparent resin that is soluble and swellable with respect to the ink.

For example, when a water-based ink containing acid dye or direct dye dye 1 is used as the recording material, the ink retaining layer is a resin having adsorption properties to the dye.

For example, it is preferable that the ink retaining layer is made of a water-soluble or hydrophilic polymer that has swelling properties with respect to water-based ink.The material constituting the ink retaining layer has the function of absorbing and trapping ink, and is non-porous. It is not particularly limited as long as it can form a layer.

The thickness of the ink retaining layer is 1 mm to absorb and trap ink.
- minutes is sufficient, and it varies depending on the ink droplet 1-,
&T, preferably 1 to 504 m, more preferably 3 to 20 ILm.

The material constituting the ink retaining layer may be any material as long as it can absorb water-based ink and retain the coloring material in the ink, but since the ink is mainly water-based, water-soluble or hydrophilic materials may be used. Such water-soluble or hydrophilic polymers preferably formed from polymers include, for example, albumin, gelatin, casein, starch, cationic starch, gum arabic, natural resins such as sodium alginate, and carboxymethyl cellulose.

Hydroxyethylcellulose, polyamide, polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, quaternized polyvinylpyrrolidone, polyvinylpyricillium halide, melamine resin, phenolic resin, algide resin, polyurethane.

Synthetic resins such as polyvinyl alcohol, ion-modified polyvinyl alcohol, polyester, and sodium polyacrylate, kI or hydrophilic polymers made by crosslinking these polymers to make them water-insoluble, and hydrophilic polymers made of two polymers. Examples include water-insoluble polymer complexes, hydrophilic polymers having a hydrophilic segment, and water-insoluble polymers.

As a method for forming an ink retaining layer and an ink transport layer on a base material, a coating solution is prepared by dissolving or dispersing the materials preferably mentioned above in a suitable solvent, and the coating solution is mixed with one of the following methods, for example:
Roll coating method.

Lot bar coach ink method, spray coating method,
Preferably, it is coated on a substrate by a known method such as an air knife coating method, and then dried quickly.
The above material may be hot-melt coated, or a single sheet may be formed from the material 1, and the sheet may be laminated onto a base material.

However, when providing the ink retaining layer on the )& material, it is preferable to strengthen the adhesion between the base material and the ink retaining layer by, for example, forming an anchor coat layer, and to eliminate spaces.

If a space exists between the base material and the ink retaining layer, the surface of the recorded image will reflect diffusely, which will substantially lower the optical density of the image, resulting in poor kf.

Means for recording images using the recording material of the present invention include fountain pens, ballpoint pens, felt-tip pens, pen plotters, etc.
, ink mist, inkjet, various types of printing, and other recording devices and recording apparatuses that use ink containing a recording agent.

From the viewpoint of high-speed image recording, inkjet recording'!
A device or pen plotter is suitable.

The ink used in the recording method of the present invention can be a conventionally known water-based and/or oil-based ink, but in order to quickly penetrate the ink transport layer and be quickly absorbed and captured by the ink retention layer, , the viscosity of the ink is 500 cp
It is necessary that the value is less than or equal to s. Preferably, the viscosity is 1
00 cps or less, TLF preferably 50 cpa or less.

In addition, water-based inks are preferable in consideration of safety against fire and stain resistance against the environment.

As the recording agent contained in the ink, conventionally known coloring agents such as dyes and pigments and/color-forming materials can be used.For example, recording agents used in inkjet recording include direct dyes, ]n group Preferred are water-soluble dyes such as natural dye 1, reactive dye 1, and food coloring.

In the recording method of the present invention, since the recording surface and the viewing surface are front and back, when printing characters.

Unlike conventional methods, it is necessary to use a device that can print mirror letters. However, in the recording material of the present invention, the ink transport layer can be made transparent by heating after recording, and in such a case, the recording surface can also be used as an observation surface. Therefore, in such a case, characters etc. may be recorded in a normal state.

(Examples) Hereinafter, the present invention will be specifically described based on Examples. Note that % or parts in the text are based on weight criteria unless otherwise specified.

Example 1 A polyethylene terephthalate film (thickness loo #1.m, bundle II) was used as a translucent material.

The following Composition A was coated on this base material 2 by a bar coater method so that the dry film thickness was 8 #Lm, and it was dried in a drying oven at 120° C. for 5 minutes.

1 pack of Hongwei polyvinylpyrrolidone (PVPK-90, made by GAF, 1
0% DIIF solution) 88 parts Nopolazik type phenolic resin (Resitop PSK-232
0, Gunei Kagakuge 10%, DIIF solution) 12 parts Furthermore, the following composition B was coated on the surface using a bar coater method so that the dry film thickness was 15 ILm, and the mixture was heated at 80°C for 10 minutes in a drying oven. Dry.

Hongo 1J Low-density polyethylene resin (Chemipearl M-200 Mitsui Petrochemical Industry Co., Ltd., solid content 40%, particles 'l!5gtn) 100
FRI ethylene-vinyl acetate copolymer resin (Chemipearl V
-100. Manufactured by Mitsui Petrochemical Industries, solid content 40%.

Grain W 5 ILm) 10
0.2 parts polyoxyethylene octylphenyl ether (Emulgen 810, manufactured by Kako Co., Ltd.) The surface of the base material of the thus obtained recording material was sandblasted to a surface roughness of JISBOIIOI (maximum height) 25
The surface was roughened to obtain a white opaque recording material of the present invention.

Example 2 Surface roughness and M large height) 123 (JIS
Using a polyethylene terephthalate film (BOBol), the following composition C was coated on the smooth surface of this base material using a bar coater method so that the dry film thickness was 5 gm.
It was dried in a drying oven at 0°C for 10 minutes.

Hongu 1S Polyhinylpyrrolid 7 (PVPK-90, manufactured by GAF,
10% DNF solution) 84 parts styrene/acrylic acid copolymer (Oxilar 2 SH-
2100, manufactured by Nippon Shokubai Chemical, 10% DIIF solution) 16
? 8. Further, the following composition was coated on the "-" by a bar coater method so that the dry film thickness was 20 m, and dried in a drying oven at 80 DEG C. for 10 minutes.

100 parts of polymethacrylate resin (microspheres made by Matsumoto Yushi Seiyaku, average particle size 10 m), ionomer resin (Chemipearl SA-100, made by Mitsui Petrochemical Industries, solid content 35%) 30? $ Sodium dioctyl sulfosuccinate (Perex 0T-P, manufactured by Kako, solid content 70%
) 0.15 parts water
20 parts The recording material of the present invention thus obtained was white and opaque.

Example 3 The polyethylene terephthalate film used in Example 1 was used as a translucent base material, and the following composition A was applied on this base material.
was applied by a bar coater method to a dry film thickness of 10 partsm, and dried in a drying oven at 100° C. for 12 minutes.

Hongwei 1j Horizontal polymer (25% methyl cellosolve solution) 60 parts Methyl vinyl ether/preic anhydride monoethyl ester (Gantrez ES-425, GAF!l!
, 10% water/ethanol solution) 40 parts The L-structure polymer has a main chain (64 parts of 2-hydroxyethyl meth-7 acrylate and 16 parts of dimethyl acrylic 7-amide
20 parts of methyl methacrylate macromer was grafted onto 80 parts of the copolymer with i).

Further, the following composition F was coated thereon by a bar coater method so that the dry film thickness was 10#Lm, and dried in a drying oven for 70'' minutes.

Thermoplastic elastomer resin (Chemipearl A-100, manufactured by Mikata Petrochemical Company X, solid content 40%.

Particle size 5p, m) 100 parts Ionomer resin (Chemi Pearl 5A-100, manufactured by Mikata Petrochemical Industries, solid content 35%) 10 parts Polyoxyethylene (Emulgen A-500, manufactured by Kajo)
0.2 parts The base material surface of the recording material thus obtained was coated with J
A white opaque recording material of the present invention was obtained by roughening the surface of 15BO801 to a maximum height of 15s.

Example 4 The smooth surface of a polyester film embossed with surface roughness (maximum height) 20S on one side was plasma treated, and composition E and composition F used in Example 3 were used, and the same procedure as in Example 3 was performed. An ink retaining layer and an ink transport layer were formed by the method described above to obtain a white, opaque recording material of the present invention.

Comparative Example 1 Commercially available inkjet paper (IJ mud coat paper NN,
(manufactured by Mitsubishi Paper Industries, Ltd.) was used as the recording material.

Comparative Example 2 Using the inkjet paper used in Comparative Example 1 as a recording material, inkjet recording was performed in the same manner as in Example 5 described later, and then a laminator (MSS Lamihera L-2
30, laminated river film (Meiko Shokai'J) using
Pouch film 1004m.

(manufactured by II Hikari Shokai) was laminated on the image recording surface.

Comparative Example 3 Commercially available glossy paper (SA Kinfuji Super Art, manufactured by Kanzaki Paper Industries)
was used as the recording material.

Comparative Example 4 The recording material prepared in Example 1 was used as a recording material without forming irregularities on the surface of the base material.

Example 5 and Comparative Examples Using the following four types of ink on each of the recording materials of the Example and Comparative Example, generate bubbles with a heating resistor and eject the ink with the pressure. Inkjet recording was carried out using a recording apparatus having 12 ports for on-demand inkjet recording. The compositions of the four types of inks used are shown below, and the recorded matter thus obtained was tested and evaluated in accordance with the following method to determine whether they were sufficiently suitable for the purpose of the present invention. The evaluation results are shown in Table 1 below.

Drumsmith U (Composition) C, 1, Acid Yellow 23 2:? I
l diethylene glycol 15 parts water
85th Department Mukou U (Group X
&) C, 1, Acid Red 92 2 parts diethylene glycol 15 parts water
85 part engineering 2 (composition) G, 1. Direct Blue 86 2 parts diethylene glycol 15 parts water
85 parts: Li21 (composition) C, 1, Direct Black 19 2 parts diethylene glycol 15f11 water
85 parts (1) Ink absorption is measured by leaving the recorded matter at room temperature after inkjet recording,
The time required for the ink to sufficiently dry and fix without adhering to the finger when touching the recording area with the finger was measured.

(2) Image optical density (0,0,) is Macbeth density, 1)
Using TR524, the black ink recording area was measured from the image observation side (A) and the recording side (B).

(3) Image surface gloss was determined by measuring 459tln surface gloss of the observed image surface based on JIS Z B741.

(4) Operability is complicated when forming recorded images!
Those that do not require it are marked 0, and those that do not are marked ×.

(5) III blocking property is measured at 30°C and 90% humidity.
×
, the case of good tIf was set as 0.

A comprehensive evaluation was made based on the above results. The results are shown in Table 1.

In terms of the overall ++ value, the ink absorption is quick, the suitability for inkjet recording is excellent, the glossiness of the image observation surface, the clarity of the image, and the operability during image creation are good. Inkjet Suitability 1: If there was a deficiency in even one of the gloss of the image observation surface and the operability during image formation, it was rated as "poor".

(Effects) The recording material of the present invention configured as described in 1- below makes it impossible to observe the recorded image from the side recorded with ink, unlike ordinary paper. However, by observing the recorded image from the side opposite to the recording medium, that is, the ink-retaining layer or substrate side.

It has excellent effects that could not be obtained conventionally.

That is, since the ink retaining layer has a light transmittance of 41%, diffuse reflection on the image viewing surface is reduced.

A high image optical density that could not be achieved when recording with ink on a porous sheet such as paper can be obtained.

In addition, the ink transport layer serving as the recording surface has liquid permeability, and 1[
The inclusion of cracks and communication holes improves ink absorption and resolution of recorded images, making it possible to provide clear images.

Furthermore, when a translucent substrate is used as the substrate, in addition to the above-mentioned effects based on the substrate's optical transparency, the recorded image has gloss, water resistance, weather resistance, and abrasion resistance. Granted.

The recording material of the present invention is significantly superior in terms of the optical density of recorded images and the operability when creating recorded images, compared to the conventional method of laminating a transparent film on the surface of recorded images. .

In addition, since the recording material of the present invention has an uneven shape on its recording or viewing surface or both surfaces, the problem of blocking, which has conventionally caused many troubles, is eliminated, and the paper can be fed and discharged smoothly during recording. It is possible to fully cope with high-speed recording, and even after recording,
The problem of image damage or destruction due to blocking between recording materials has also been eliminated. In particular, by imparting an appropriate uneven shape to the viewing surface, excessive sharpness can be eliminated when viewing an image, and a soft and calm visual sensation can be obtained.

(Left below) 1ro) -1-j猷- (A) 1.25 1.38
1.30 1.28(B)
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××××4, Fraud applicant Canon Co., Ltd.
Nei City Official Book (Voluntary) October 2, 1986

Claims (14)

[Claims] (1) A recording material having an ink transport layer and an ink retention layer, and having an uneven surface. (2) The liquid recording material according to claim (1), wherein the ink transport layer and the ink retention layer are laminated on a base material. (3) The recording material according to claim (1), wherein the outer surface of the ink transport layer has an uneven shape. (4) The recording material according to claim (1), wherein both surfaces of the recording material have an uneven shape. (5) The recording material according to claim (2), wherein the base material is translucent. (6) Claim No. 2, wherein the ink transport layer is porous (
The recording material described in item 1). (7) The ink transport layer is mainly composed of particles that do not stain the recording material and a binder.
The recording material described in item 1). (8) The recording material according to claim (1), wherein the ink retaining layer is non-porous. (9) The recording material according to claim (1), wherein the ink retaining layer is mainly composed of a water-soluble or hydrophilic polymer. (10) The recording material according to claim (1), wherein the ink transport layer is light diffusing and the ink retaining layer is more light transmitting than the ink transport layer. (11) The recording material according to claim (1), wherein the ink retaining layer has a stronger ink absorption ability than the ink transport layer. (12) The recording material according to claim (1), wherein the ink transport layer has communication holes. (13) The recording material according to claim (1), wherein the ink transport layer includes cracks. (14) A recording method in which recording is performed using ink on the recording surface of a recording material having an ink transport layer and an ink retention layer, the surface of the recording material having an uneven shape. Characteristic recording method.