JPH0489286A - Thermally transferable recording material and thermally transferable recording method - Google Patents

Abstract

PURPOSE:To obtain a recording material with superb coloring, properties, high color dissolution and image stability and make possible the formation of a color image with high pixel density by forming a layer containing a magenta color expressed by a specific formula on a support. CONSTITUTION:A recording material consists of a thermal layer containing a magenta color expressed by the formula on a support. In addition, the magenta color is an azomethine-type color having superb heat dissipation, high coloring properties and solvent dissolution. The paint for formation of a thermal layer is prepared by dissolv ing one or more than two types of color in a solvent with a binder or dispersing the color in the form of fine particles, and is applied to the support and dried to form the thermal layer. The support is such as capable of withstanding heat generated by a thermal head and is represented by a thin leaf sheet like a capacitor paper or a heat-resistant plastic film like polyethylene terephthalate. The magenta color in a thermally transferable recording material 6 consisting of the support 4 and the thermal layer 5 becomes dispersed and migrated to an image-receiving material 3 due to heat generated by a thermal resistor 8 on a thermal head 7 and then becomes fixed in an image-receiving layer 2 on the support 1.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a heat-sensitive transfer recording material and a heat-sensitive transfer recording method, and more particularly, to a novel material containing a magenta dye having excellent hue and thermal diffusivity. The present invention relates to a thermal transfer recording material and a thermal transfer recording method using the same to efficiently form high-density color images with excellent hue and image stability (image storage stability).

[Prior art and invention or problem to be solved] Color recording technologies such as inkjet method, electrophotographic method, and thermal transfer method have been considered as a method of obtaining color hard copies. This method has advantages such as easy operation and maintenance, miniaturization of the device, low cost, and low running cost.

In this thermal transfer method, a transfer sheet (thermal transfer recording material) consisting of a heat-melt ink layer provided on a support is heated with a heat-sensitive head, and the ink is transferred from the heat-melt ink layer to the transfer sheet (image-receiving material). The transfer sheet, which has an ink layer containing a heat-diffusible dye (sublimable dye) on a support, is heated with a heat-sensitive head, and the heat-diffusible dye is transferred from the ink layer to the transfer sheet. There are two types of transfer: a thermal diffusion transfer method (sublimation transfer method), and the latter method changes the amount of dye transferred according to the thermal energy of the thermal head, and the image Since Wim can be controlled, it is advantageous for full-color recording.

However, in the thermal diffusion transfer method, the dye used in the thermal transfer recording material is important, and the color tone of this dye has a great influence on the speed of thermal transfer recording, image quality, storage stability of the image, etc.

It is desirable that this type of dye has the following properties.

(a) Easily diffuses heat under heat-sensitive recording conditions (head temperature, heating time).

(b) It must have a favorable hue in terms of color reproduction.

(c) Do not thermally decompose at the heating temperature during recording.

(d) Good image stability (light resistance), heat resistance, moisture resistance, chemical resistance, etc.

(e) The molar extinction coefficient must be large.

(f) Easily added to thermal transfer recording materials.

(g) It must be easy to synthesize.

(h) Good solubility in solvents.

Azomethine-type magenta dyes have been known as heat-diffusible magenta dyes for heat-sensitive transfer recording materials, such as JP-A-5! No. l-184339, No. 59-22248
No. 844, No. 50-130735, No. 64- [i:
It is disclosed in patent publications such as No. 1194 and JP-A-1-176592.

These magenta dyes satisfy some of the conditions mentioned above, or some dyes have secondary absorption on the short wavelength side due to their absorption characteristics, making it impossible to obtain a satisfactory hue in terms of color reproduction, and image stability. Problems such as poor performance and low solvent solubility remain.

The present invention has been made to solve the above problems.

That is, an object of the present invention is to provide a thermal transfer recording material containing a heat-diffusible magenta dye having excellent hue, dye solubility, and image stability (image storage stability), and to efficiently produce color images using the material. It is an object of the present invention to provide a thermal transfer recording method that allows recording with high density.

[Means for solving the above problem] The present invention according to claim 1 for achieving the above object,
This is a heat-sensitive transfer recording material characterized by having a layer containing a magenta dye represented by the following general formula [I] on a support.

Further, the present invention according to claim 2 provides a thermal transfer recording material in which an image receiving material is superimposed on the layer of a thermal transfer recording material having a layer containing a magenta dye represented by the following general formula [I] on a support, and the thermal transfer recording material is This is a thermal transfer recording method characterized in that an image is formed on an image-receiving material by heating the material in accordance with image information and diffusing and transferring the dye to the image-receiving material side.

[In the formula 1, R' represents a -valent group.

(R4 and R5 are an alkyl group which may be the same or different, or an atomic group that is bonded to each other to form a 5- or 6-membered ring with the nitrogen atom.

) Rff and R6 represent a hydrogen atom or a monovalent group, and may be the same or different.

X is 1. -N-C=Represents a group of nonmetallic atoms that can form a 5- or 6-membered ring containing a N- bond.

m represents an integer from 1 to 4. ] Hereinafter, general formula [I] will be further explained in detail.

The monovalent group represented by R' is, for example, an alkyl group (eg, a methyl group, an ethyl group).

isopropyl group, tert-butyl group, etc.), cycloalkyl group (e.g., cyclopentyl group, cyclohexyl group, etc.), aryl group (e.g., phenyl group, etc.), aralkyl group (e.g., pencil group, 2-phenethyl group)
, alkoxy groups (e.g. methoxy, ethoxy, impropoxy, n-butoxy, etc.), aryloxy groups (e.g. phenoxy), cyano groups, acylamino groups (e.g. acetylamino, propionylamino, etc.), alkylthio groups (e.g. methylthio group, ethylthio group, n-butylthio group, arylthio group (
For example, phenylthio group), sulfonylamino group (
For example, methanesulfonylamino group, benzenesulfonylamino group, etc.), ureido group (for example, 3-methylureido group, 3゜3-dimethylureido group, 1,3-dimethylureido group, etc.), carbamoyl group (for example, methylcarbamoyl group, ethyl carbamoyl group, dimethylcarbamoyl group, etc.), sulfamoyl group (e.g. ethylsulfamoyl group, dimethylsulfamoyl group, etc.)
, alkoxycarbonyl groups (e.g. methoxycarbonyl group, ethoxycarbonyl group, etc.), aryloxycarbonyl groups (e.g. phenoxycarbonyl group, etc.),
Sulfonyl groups (e.g. methanesulfonyl group, butanesulfonyl group, phenylsulfonyl group, etc.), acyl groups (
Examples include an acetyl group, a propanoyl group, a butyroyl group, etc.), and an amino group (eg, an amino group, a methylamino group, an ethylamino group, a dimethylamino group, etc.).

Among them, R1 is preferably an alkyl group or an aryl group.

More preferred R1 is an alkyl group having 1 to 5 carbon atoms, particularly 2 to 4 carbon atoms, and may be either a straight chain or branched alkyl group, and even more preferred R1 is a phenyl group. be able to. Phenyl group is M
Met may have a substituent, particularly an alkoxy group having 1 to 4 carbon atoms.

There are phenyl groups that can be substituted with a halogen atom (for example, a chlorine atom), there are phenyl groups that can be substituted with an acetylamino group, and there are phenyl groups that can be substituted with a sulfonylamino group. It is a phenyl group.

In the formula, R4 and R5 represent an alkyl group which may be the same or different, or an atomic group bonded to each other to form a 5- or 6-membered ring with the nitrogen atom.

Examples of R4 and R5 include alkyl groups having 1 to 5 carbon atoms and which may have an alkoxy group.

Preferred alkyl groups include alkyl groups having 1 to 3 carbon atoms, and these alkyl groups may have M-substituted alkoxy groups.

The above-mentioned radicals can be mentioned when R4 and R5 are bonded to each other.

The above R3 and R6 represent a hydrogen atom or a monovalent group.

Examples of the -valent group include halogen atoms (eg, chlorine atom, fluorine atom, etc.) and the monovalent groups listed above as R'. Among these valent groups, alkyl groups, acylamino groups, alkoxy groups, etc. are preferred, and methyl groups, acetylamino groups, methoxy groups, etc. are particularly preferred.

The X represents a nonmetallic atomic group capable of forming a 5-negative or 6-membered heterocycle containing a -N-C=N- bond.

Preferred examples of X include -N=CC=C- and the like.

The m represents an integer of 1 to 4, preferably 1 or 2.

The groups represented by R', R'', R', R5 and R6 may each have a substituent.

Examples of the substituent include hydroxyl group, halogen atom (e.g. chlorine atom, fluorine atom, etc.), alkyl group (e.g. methyl group, ethyl group, isopropyl group,
n-butyl group, etc.), cycloalkyl group (e.g. cyclopentyl group, cyclohexyl group, etc.), aryl group (
phenyl group, etc.), alkenyl group (e.g., 2-propenyl group, etc.), aralkyl group (e.g., pencil group, 2-propenyl group, etc.),
-phenethyl group, etc.), alkoxy groups (e.g. methoxy, ethoxy, impropoxy, n-butoxy, etc.), aryloxy groups (e.g. phenoxy), cyano groups, acylamino groups (e.g. acetylamino, propionylamino), groups), alkylthio groups (
(e.g., methylthio group, ethylthio group, n-butylthio group, etc.), arylthio group (e.g., phenylthio group, etc.), sulfonylamino group (e.g., methanesulfonylamino group, benzenesulfonylamino group, etc.), ureido group (e.g., 3-methylureido group, 3,3-dimethylureido group, l,3-dimethylureido group, etc.), carbamoyl group (e.g., methylcarbamoyl group, ethylcarbamoyl group, dimethylcarbamoyl group, etc.), sulfamoyl group (e.g., ethylsulfamoyl group, dimethylsulfamoyl group, etc.) ), alkoxycarbonyl groups (e.g., methoxycarbonyl group, ethoxycarbonyl group, etc.), aryloxycarbonyl groups (e.g., phenoxycarbonyl group, etc.), sulfonyl groups (e.g., methanesulfonyl group, butanesulfonyl group, phenylsulfonyl group, etc.), acyl Examples thereof include groups (eg, acetyl group, propanoyl group, butyroyl group, etc.), amino groups (eg, methylamino group, ethylamino group, dimethylamino group, etc.), and nitro group.

In addition to the above general formula [I], the magenta dye contained in the thermal transfer material of the present invention is represented by the following general formula [I1] and general formula [ml].

(R').

R? [II] (R').

(However, the general formula [R1 and [R1 in ml,
R2, R3, R4, R'- and R6 are represented by the general formula [
I] has the same meaning as defined in

R7 and R8 represent a hydrogen atom or a monovalent group.

Preferred are alkyl or aryl groups. Further, R7 and R8 may be rotated or different from each other, or may be bonded to each other to form a 5-negative or 6-membered ring. )--A specific representative example of the magenta dye represented by the formula [I] is shown in FIG.

The magenta dye represented by the general formula [I], that is, the magenta dye according to the present invention, are all azomethine type dyes with excellent thermal diffusivity, hue, and solvent solubility.

In addition, "thermal diffusion" as used in the present invention refers to the diffusion and/or transfer of substantially the dye alone in a gas, liquid, or solid state depending on the thermal energy when heating a thermal transfer recording material. This is essentially the same meaning as "sublimation transfer" among those skilled in the art.

The magenta dye according to the present invention has the following general formula [I
It can be produced by oxidative coupling of a compound represented by [V] and a compound represented by the following general formula [V] in an alkaline atmosphere in the presence of an oxidizing agent.

(However, R1, R6 and X in the general formula [IV] have the same meaning as defined in the general formula [I.) H2 (However, R2 and R3 in the general formula [V] This oxidative coupling reaction is preferably carried out under alkaline conditions, and the reaction medium may be an organic solvent, an aqueous organic solvent, or an aqueous solution.

In addition, as an oxidizing agent, the general formula [
Any material having a potential capable of oxidizing the compound represented by V] may be used, such as silver halide, hydrogen peroxide, manganese dioxide, potassium persulfate, inorganic oxidizing agents such as oxygen, N-bromosuccinimide, chloramine, etc. It is also possible to use an organic oxidizing agent such as T.

In addition to the above-mentioned synthesis method, the yellow dye according to the present invention can be produced by
It can also be produced or used by electrode reaction.

When relying on this electrode reaction, current, voltage, supporting electrolyte,
It is necessary to appropriately select solvents, electrodes, etc.

The heat-sensitive transfer recording material of the present invention comprises a layer containing a magenta dye represented by the general formula [I] (hereinafter sometimes referred to as a heat-sensitive layer) on a support.

The content of the dye in the heat-sensitive layer is 0 per support.
．． 05 to 10 g is preferred.

The heat-sensitive layer is formed by dissolving one or more of the dyes in a solvent together with a binder, or by dispersing one or more of the dyes together with a binder in the form of fine particles in a solvent. It can be formed by preparing a coating material for use, applying the coating material onto a support, and drying it appropriately.

The thickness of the heat-sensitive layer is preferably in the range of 0.1 to 5 gm in dry film thickness.

The binder includes water-soluble polymers such as cellulose, polyacrylic yarn-resistant, polyvinyl alcohol, and polyvinylpyrrolidone, acrylic resin, methacrylic resin, polystyrene, polycarbonate, polysulfone, polyether sulfone, polyvinyl butyral, polyvinyl acetal, and nitrocellulose. , ethylcellulose, etc.

These binders can be used not only by dissolving one or more of them in an organic solvent, but also by dispersing them in the form of a latex.

The amount of binder to be used is 0.00000000000000000000000 per 1rn' of the support.
05-30g is preferred.

Solvents for preparing the paint include water, alcohols (e.g. ethanol, propatool), cellosolves (e.g. ethyl acetate), aromatics (e.g. toluene, xylene, chlorobenzene), ketones (e.g. acetone, methyl ethyl ketone). , ethers (eg, tetrahydrofuran, sioxane), chlorinated solvents (eg, chloroform, trichlorethylene), and the like.

The support may be one that has good dimensional stability and can withstand the heat of a heat-sensitive head during recording, or a thin paper such as condenser paper or glassine paper, or a heat-resistant material such as polyethylene terephthalate, polyamide, or polycarbonate. A plastic film is preferably used.

The thickness of the support is preferably 2 to 30 gm, and the support may have a subbing layer for the purpose of improving adhesion to the binder and preventing transfer and dyeing of the dye to the support.

Furthermore, a sticking layer may be provided on the back side of the support (the side opposite to the heat-sensitive layer) for the purpose of preventing the head from adhering to the support.

The heat-sensitive transfer recording material of the present invention has a heat-sensitive layer on which the heat-sensitive transfer recording material is coated.
It may have a heat-fusible layer containing a heat-fusible compound as described in Japanese Patent No. 106997.

As this heat-melting compound, a colorless or white compound having a melting point of 65 to 130°C is preferably used,
For example, waxes such as carnauba wax, beeswax, campli wax, higher fatty acids such as stearic acid and behenic acid,
Examples include alcohols such as xylitol, amides such as acetamide and benzamide, and ureas such as phenylurea and diethylurea.

Note that these heat-melting layers may contain a polymer such as polyvinylpyrrolidone, polyvinyl butyral, or saturated polyester, in order to improve the retention of the dye.

According to the thermal transfer recording material of the present invention, it is possible to obtain a magenta dye image with gradation using one type of dye, as will be described later. A total of three layers, a cyan heat-sensitive layer containing a diffusible cyan dye, a magenta heat-sensitive layer containing a heat-diffusible magenta dye according to the present invention, and a yellow heat-sensitive layer containing a heat-diffusible yellow dye, are formed on the same surface of the support. It is preferable to apply the coating repeatedly in sequence.

Furthermore, a heat-sensitive layer containing a black image-forming substance may be added to the above three layers, and a total of four layers may be repeatedly coated on the same surface of the support.

In the heat-sensitive transfer recording method of the present invention, the heat-sensitive layer or heat-fusible layer of the heat-sensitive transfer recording material and the image-receiving material are superimposed, heat corresponding to image information is applied to the heat-sensitive transfer material, and the heat-sensitive layer or heat-fusible layer An image is formed on the image-receiving material by transferring and fixing the magenta dye from the image-receiving material to the image-receiving material.

To explain this thermal transfer recording method with drawings, in FIG. is diffused and transferred to the image-receiving material 3 by heat from the heating resistor 8 of the thermal head 7, for example, and is fixed in the image-receiving layer 2 on the support l.

In addition, in the case of FIG. 2 (b) using a heat-sensitive transfer material in which a heat-fusible layer is layered on a heat-sensitive layer, when the heat-sensitive layer 5 contains the magenta dye, this magenta dye generates heat in the thermal head 7. The heat from the resistor 8 diffuses into the heat-fusible layer 9, causing cohesive failure or interfacial peeling of part or all of the magenta-containing fusible layer 9a.
Transfer to the image receiving material 3 side.

Furthermore, even when a magenta dye is contained in the heat-fusible layer 9 from the beginning, an image is formed on the image-receiving material 3 side using the same principle as shown in FIG. 2(b).

The image-receiving material used in the present invention generally uses paper, plastic film, or a paper-plastic film composite as a support, and the image-receiving layer is formed on the support by polyester resin, polyvinyl chloride resin, vinyl chloride, or other materials. - (for example, vinyl acetate, etc.), one or more polymer layers such as polyvinyl butyral, polyvinylpyrrolidone, polycarbonate, etc. are formed.

Further, the support itself may be used as an image-receiving material.

The image receiving layer may contain a basic compound and/or a mordant.

The basic compound is not particularly limited whether it is inorganic or organic, but for example, calcium carbonate, sodium carbonate, sodium acetate, alkylamine, arylamine, etc. can be used.

In addition, as a mordant, a compound having a tertiary amino group,
Examples include compounds having a nitrogen-containing heterocyclic group, or compounds having these quaternary cation groups.

[Example] Next, the present invention will be specifically explained based on Examples, but the present invention is not limited thereto.

(Example 1) Preparation of a paint A uniform solution paint was obtained using the following materials including the heat-diffusible magenta dye (M-1) shown below.

Heat-diffusible magenta dye M-1 (see Figure 1) 10 g Nitrocellulose 15 g Methyl ethyl ketone
・・・・・・ 200 mu - Preparation of heat-sensitive transfer recording material - The above coating material was applied onto a polyethylene terephthalate film (support) having a thickness of 4.5 #Lm using a wire bar in an amount of 1.0 g/1.0 g/l after drying. A heat-sensitive transfer recording material was obtained by coating and drying to a thickness of m2.

Note that a nitrocellulose layer containing a silicone-modified urethane resin (SP-2105, manufactured by Dainichiseika Chemical Co., Ltd.) is provided on the back surface of the polyethylene terephthalate film as an anti-sticking layer.

Preparation of image-receiving material Polyethylene layers are laminated on both sides of paper, and on the polyethylene layer on one side, a vinyl chloride resin containing 0.15 g/m'' of silicone oil is applied as an image-receiving layer at an amount of 5 g/m''.
An image-receiving material was obtained.

Note that the polyethylene layer on one side contains an appropriate amount of a white pigment (TiO2) and a bluing agent.

1. Thermal Transfer Recording Method 1. The above-mentioned heat-sensitive transfer recording material and the above-mentioned image-receiving material are stacked so that the coated surface of the heat-sensitive transfer recording material and the image-receiving surface of the image-receiving material face each other, and a thermal head is inserted from the anti-sticking layer side of the heat-sensitive transfer recording material. The image was recorded by hitting the target.

Table 1 shows the measurement results of the maximum reflection density, absorption characteristics (secondary absorption on the short wavelength side), and image stability (light resistance) of the obtained images.

The table also shows the results of the solubility of the magenta dye in the solvent.

The recording conditions and measurement method described above are as shown below.

Linear density of main scanning and sub-scanning: 8 dots/mm recording
Voltage/0.6W/) Heating time of knit head: 20m5ec (applied energy approximately 11.2X10-'J
) to 0.2 ms e c (applied energy approximately 1
．． The heating time was adjusted stepwise between 12x 1O-3J).

Maximum reflection density (D, □): Measured using an optical densitometer [Model PC^-65 manufactured by Konica Corporation.

Absorption characteristics: Comparative Example 1 (described later) was designated as Δ as a standard, those with high chroma were visually observed as Q, and those with low chroma were designated as ×.

Image storage stability: Evaluation was made by irradiating the sample with a xenon phase meter for 96 hours.

Pigment solubility: The solubility of the dye in methyl ethyl ketone was examined during the preparation of the paint.

(Examples 2 to 8) Magenta dyes M-2, M-3, M-6, M-8, M-11, M-
A thermal transfer recording material and an image-receiving material were prepared under the same conditions as in Example 1, except that Samples No. 12 and M-15 (both shown in FIG. 1) were used, and images were formed in the same manner.

Table 1 shows the maximum reflection density, absorption characteristics (secondary absorption on the short wavelength side), image storage stability (light resistance), and solvent solubility of the dye of the obtained image.

(Comparative Example 1.2) In place of the magenta dye M-1 in Example 1, the following 2
A heat-sensitive transfer recording material and an image-receiving material were produced under the same conditions as in Example 1, except that comparative dyes A and B were used, respectively, and images were formed in the same manner.

Table 1 shows the measurement results of the maximum reflection density of the obtained image, absorption characteristics (secondary absorption on the short wavelength side), image storage stability (light resistance), and solvent solubility of the dye.

Comparison dye A Comparative dye B double) O end the good Slightly poor 1st y: Bad.

As is clear from Table 1, in each of the Examples, it was possible to obtain a magenta image with higher density and better absorption characteristics and image storage stability than in each Comparative Example.

Moreover, the magenta dye used in each example has good solubility in solvents and is excellent in manufacturing suitability for ink sheets, so it is possible to manufacture thermal transfer recording media with high productivity, that is, efficiently. can.

(Example 9) As shown in FIG. 3, a support ll made of the same material as in Example 1
A yellow heat-sensitive layer 12, a magenta heat-sensitive layer 13, and a cyan heat-sensitive layer 14 were sequentially coated thereon to produce a heat-sensitive transfer recording material.

However, the magenta heat-sensitive layer 12 has the same structure as in Example 1, and the structures of the yellow heat-sensitive layer 13 and the cyan heat-sensitive layer 14 are as shown below.

Yellow thermosensitive layer 13- Binder: Polyvinyl butyral, attached amount 0.9 g
/ m ” Yellow pigment: It has the following structure.Amount 0.6g/m
” Cyanide heat-sensitive layer 14 - Hinder 12 nitrocellulose, coating amount 0.9 g/m
2 Cyan dye: has the following structure. Amount 0.6 g/
m 2 When thermal transfer was performed using a video printer (manufactured by Hitachi, vYloo) using the above thermal transfer recording material and the same image receiving material as in Example 1, good gradation, color reproducibility, and image quality were obtained. Full color images with stability were obtained.

(Example 10) p-) as an intermediate layer on the thermal transfer recording material of Example 9
- Add 100 ml of an aqueous solution containing 5 g of ball mill dispersion of toluamide, 7 g of polyvinylpyrrolidone, 3 g of gelatin, and 0.3 g of the following hardener to the amount of p-toluamide applied or 0.5 g.
It was coated to give a ratio of g/yy12.

Hardener: Na Antioxidant CaHi7 Furthermore, as a heat-fusible layer on the intermediate layer, the following ultraviolet inhibitor (coating amount 0.1 g/m") and the following antioxidant (coating amount 0.1 g/m2 ) and ethylene-vinyl acetate copolymer (vinyl acetate content 20% by weight, coating amount 0.2 g/m
2) containing carvanawa wax (coating amount 0.2 g/m"
) was coated by a hot melt coating method to produce a heat-sensitive transfer recording material.

Ultraviolet inhibitor: H C, H9(t) Using this heat-sensitive transfer recording material and plain white paper as an image-receiving material, heat-sensitive transfer was performed using a video printer in the same manner as in Example 9.

As a result, a full-color image with excellent color reproducibility and gradation was obtained.

[Effects of the Invention] According to the heat-sensitive transfer recording material of the present invention, since a specific heat-diffusible magenta dye is added to the heat-sensitive layer or the heat-fusible layer,
It is possible to obtain high-density color images with excellent hue and image stability (image storage stability).

Furthermore, the magenta dye of the present invention has good solubility in solvents and is excellent in suitability for producing ink sheets.

Further, according to the thermal transfer recording method of the present invention, images having the above characteristics can be efficiently formed using the above thermal transfer recording material.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the structural formula of a typical magenta dye according to the present invention. FIGS. 2A and 2B are explanatory diagrams showing the principle of the thermal transfer recording method of the present invention. FIG. 3 is a sectional view showing an example of the thermal transfer recording medium of the present invention. DESCRIPTION OF SYMBOLS 1...Support, 2...Image receiving layer, 3...Image receiving material,
4...Support, 5...Thermosensitive layer, 6...Thermosensitive transfer recording material, 7...Thermal head, 8...Thermal head, 9...Thermofusible layer, 9a... Part or all of the heat-melting layer containing the dye, 11...Support, 12
...Yellow heat-sensitive layer, 13...Magenta heat-sensitive layer, 1
4...Cyan heat-sensitive layer. Figure 1 Figure 1 (Tsubu 1) □□□− □□Thousand□□□Layer 15'. Figure 2 (A) (O) Figure 3

Claims (2)

[Claims] (1) A thermal transfer recording material characterized by having a layer containing a magenta dye represented by the following general formula [I] on a support. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [I] [However, in the formula, R^1 represents a monovalent group. R^2 represents a hydroxyl group or ▲There are numerical formulas, chemical formulas, tables, etc.▼. (However, R^4 and R^5 are alkyl groups that may be the same or different, or atomic groups that combine with each other to form a 5- or 6-membered ring with a nitrogen atom.) R^ 3 and R^6 represent a hydrogen atom or a monovalent group, and may be the same or different. X represents a group of nonmetallic atoms that can form a 5- or 6-membered ring containing a -N-C=N- bond. m represents an integer from 1 to 4. ] (2) An image-receiving material is superimposed on the layer of a heat-sensitive transfer recording material having a layer containing a magenta dye represented by the general formula [I] on a support, and the heat-sensitive transfer recording material is used to convey image information. 1. A thermal transfer recording method, characterized in that an image is formed on an image-receiving material by heating in accordance with the temperature of the image-receiving material and diffusing and transferring the dye to the image-receiving material.