JPH0545828A - Heat developable color photosensitive material - Google Patents

Abstract

PURPOSE:To obtain a multi-layer heat developable color photosensitive material having excellent color separation for exposure to near infrared to infrared region, high sensitivity and excellent raw-storage stability. CONSTITUTION:At least one emulsion layer contains a thiadicarbocyanine dye and a silver halide emulsion sensitized in a manner that it shows the max. spectral sensitivity in 700-900nm wavelength range and <=1/3 spectral sensitivity of the max. at wavelength longer than the above range by 20nm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a multi-layer heat developable color light-sensitive material capable of obtaining an image excellent in color separation with exposure from near infrared to infrared region, especially to semiconductor laser. The present invention relates to a heat-developable color light-sensitive material having high sensitivity and excellent raw storage stability.

[0002]

2. Description of the Related Art Photothermographic materials are known in this technical field, and the photothermographic material and its process are described, for example, in "Basics of Photographic Engineering", Non-silver salt photograph edition (1982, published by Corona Publishing Co., Ltd.). ~ 255, U.S. Pat. No. 450
No. 0626 and the like.

In addition, for example, a method of forming a dye image by a coupling reaction between an oxidized product of a developing agent and a coupler is described in US Pat. Nos. 3,761,270 and 4,021,240. Further, a method of forming a positive color image by a photosensitive silver dye bleaching method is described in US Pat. No. 4,235,957.

Recently, there has been proposed a method of releasing or forming a diffusible dye imagewise by heat development and transferring the diffusible dye to a dye fixing element. In this method, a negative dye image or a positive dye image can be obtained by changing the kind of dye-donor compound used or the kind of silver halide used. More specifically, US Pat. Nos. 4,500,626, 4,483,914, and 4,
503137, 4559290 and JP-A-58-1.
49046, JP-A-60-133449 and 59-
No. 218443, No. 61-238056, European Patent Publication 220746A2, Open Technical Report 87-6199, European Patent Publication 210660A2 and the like.

Many methods have been proposed for obtaining a positive color image by heat development. For example, in U.S. Pat. No. 4,559,290, a so-called DRR compound, which is an oxidized type compound having no color image releasing ability, is made to coexist with a reducing agent or a precursor thereof, and the reducing agent is added by thermal development according to the exposure amount of silver halide. A method has been proposed in which the diffusible dye is released by being oxidized and reduced by the reducing agent remaining without being oxidized. Further, in European Patent Publication No. 220746 and Kokai Giho No. 87-6199 (Vol. 12, No. 22), NX bond (X is an oxygen atom, a nitrogen atom or a A heat-developable color light-sensitive material using a compound which releases a diffusible dye by reductive cleavage of (representing a sulfur atom) is described.

Conventional color light-sensitive materials are usually blue, green,
It has red spectral sensitization, and it is common to use a color CRT (cathode ray tube) as an exposure light source in order to obtain an image by using image information once converted into an electric signal in such a color photosensitive material. However, the CRT is not suitable for obtaining a large size print.

Further, as a writing head capable of obtaining a large size print, a light emitting diode (LED) is used.
Semiconductor lasers (LD) have been developed. However, none of these optical writing heads that efficiently emit blue light has been developed.

Thus, for example, a light emitting diode (LED)
When using, near infrared (800nm), red (670n
It is necessary to expose a color light-sensitive material having three layers spectrally sensitized to near infrared, red and yellow by a light source combining three light emitting diodes of m) and yellow (570 nm). "Nikkei New Material", September 14, 1987 issue No. 4
It is described on pages 7 to 57 and is partially used.

A system for recording on a color light-sensitive material having three light-sensitive layers having spectral sensitivity at each wavelength with a light source combining three semiconductor lasers emitting light of 880 nm, 820 nm and 760 nm is disclosed in JP-A-61-161. 137149.

Generally, in a multi-layer color light-sensitive material, when each color of yellow, magenta and cyan is exposed to three different spectral regions to develop colors, it is possible to reproduce the colors without mixing. Has become an important technology on. In particular, when a light emitting diode (LED) or a semiconductor laser (LD) is used as an exposure light source, there is no choice but to design three spectral sensitivities in a narrow spectral range (from the red end to the infrared region).
The key to improving color separation is how to reduce the overlap of spectral sensitivities.

Conventionally used sensitizing dyes in the near infrared to infrared region have a very broad spectral sensitivity, so that there is a problem that spectral sensitivities easily overlap and color separation is poor.

To ensure color separation, US Pat. No. 46
As described in 19892, there is known a technique of sequentially increasing the sensitivity on the short wavelength side and providing a filter layer. However, increasing the sensitivity of short wavelengths sequentially has the drawback of causing increased fog and deteriorating raw storage stability. Moreover, it is known that, in infrared sensitization, raw storage stability is originally poor. Further, it has been difficult to achieve high sensitivity in infrared sensitization.

As described above, it has been particularly desired to develop a light-sensitive material having high sensitivity, excellent raw storage stability, and good color separation.

[0014]

DISCLOSURE OF THE INVENTION The object of the present invention is 70
It is an object of the present invention to provide a heat-developable color light-sensitive material which is excellent in color separation property with respect to exposure of a semiconductor laser having a long wavelength of 0 nm or more, high sensitivity, and excellent raw storage stability.

[0015]

The above objects are achieved by the present invention described in (1) to (3) below.

(1) At least three silver halide emulsion layers having different spectral sensitivities are provided on a support, and when silver ions are reduced to silver under a high temperature condition, this reaction is dealt with, or Conversely, in a heat-developable color light-sensitive material having at least three layers containing dye-donor compounds that release or generate dyes having mutually different hues, at least one of the silver halide emulsion layers is thiadicarbohydrate. Contains at least one cyanine dye, and has a maximum spectral sensitivity wavelength of 700 nm or more and 900 nm or less,
And at least one silver halide emulsion spectrally sensitized so that the spectral sensitivity to light having a wavelength 20 nm longer than the wavelength of the maximum spectral sensitivity is 1/3 or less of the maximum spectral sensitivity. Thermal development color photosensitive material.

(2) The heat-developable color light-sensitive material according to claim 1, wherein the thiadicarbocyanine dye is represented by Chemical Formula 1 or Chemical Formula 2.

[0018]

[Chemical 3]

[0019]

[Chemical 4]

[In Chemical Formula 3, Q ₁ and Q ₂ each represent a methylene group, and R ₁ and R ₂ each represent an alkyl group. R ₃ and R ₄ each represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, and R ₃ and R ₄ are not hydrogen atoms at the same time. L ₁ , L ₂ and L ₃ each represent a methine group. A ₁ and A ₂ each represent an atomic group necessary for forming a benzene ring or a naphthalene ring. R ₁ and L ₁ , and R ₂ and L ₃ may be bonded to each other to form a ring. M ₁ represents a charge balancing counter ion, and m ₁ represents a value required to neutralize the charge. Conversion 4
At R ₁ , R ₂ , A ₁ , A ₂ , M ₁ and m ₁
Are synonymous with those in Chemical formula 3, respectively. R ₁ and R ₂ may combine with a methine group to form a ring. R
₅ represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group. ]

(3) The above silver halide emulsion is chemically sensitized in the presence of at least one of the thiadicarbocyanine dyes and a tetraazaindene compound, and is thus obtained (1) or (2). The heat-developable color light-sensitive material described in.

[0022]

[Specific Structure] The specific structure of the present invention will be described in detail below.

The heat-developable color light-sensitive material of the present invention has at least three silver halide emulsion layers having different spectral sensitivities on a support.

At least one of the silver halide emulsion layers contains at least one thiadicarbocyanine dye and has a maximum spectral sensitivity wavelength (λmax) of 700.
~ 900 nm and 2 from the wavelength of this maximum spectral sensitivity
It contains at least one silver halide emulsion spectrally sensitized so that the spectral sensitivity (S ₁ ) to light having a long wavelength of 0 nm is 1/3 or less of the maximum spectral sensitivity (S ₀ ).

By doing so, it is possible to improve the color separation property of the semiconductor laser or the like for exposure in the near-infrared to infrared region, and it may become unnecessary to provide a filter layer.

It is generally known that the infrared-sensitized light-sensitive material has poor raw storage stability, but in order to improve the color separation property, a method of sequentially increasing the sensitivity on the short wavelength side is used. When (US Pat. No. 4,619,892) is adopted, there has been a problem that fog is increased and the stability of raw storage is further deteriorated. However, in the present invention, the color separability can be improved without causing such a problem. Further, there is a problem that high sensitivity cannot be obtained with a light-sensitive material subjected to infrared sensitization, but the present invention can solve this problem.

Then, as described above, using a thiazylcarbocyanine dye, λmax is 700 to 900 nm,
Moreover, the effect of the present invention can be obtained only when all the conditions that the S ₁ / S ₀ ratio is 1/3 or less are satisfied, and the effect of the present invention can be obtained if any one of these conditions is omitted. Absent. For example, even if the λmax and S ₁ / S ₀ ratios are satisfied, dyes other than the thiadicarbocyanine dyes have drawbacks such as insufficient color stability, but insufficient raw storage stability. Further, even with thiadicarbocyanine dyes, if the S ₁ / S ₀ ratio exceeds 1/3, not only the color separation properties are not sufficient, but also raw storage stability and sensitivity are not sufficient. Often occurs.

In the present invention, the lower limit of the S ₁ / S ₀ ratio is not limited, and the smaller this value is, the better the color separation property is.

In the present invention, at least three silver halide emulsion layers having different spectral sensitivities are used in combination with dye-donor compounds which release or generate dyes having different hues. It has at least 3 layers containing. In this case, the dye-donating compound may be contained in the silver halide emulsion layer or in a non-photosensitive layer adjacent to the silver halide emulsion layer. Alternatively, it may be contained in both the silver halide emulsion layer and the non-light-sensitive layer adjacent thereto. The dye-providing compound will be described later.

Next, the silver halide emulsion used in the present invention will be described.

(1) Kind of Sensitizing Dye A thiadicarbocyanine dye is used in the silver halide emulsion of the present invention, and the one represented by Chemical formula 3 or Chemical formula 4 is preferable.

In the chemical formula 3, Q ₁ and Q ₂ each represent a methylene group, and R ₁ and R ₂ each represent an alkyl group. R ₃ and R ₄ each represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, and R ₃ and R ₄ are not hydrogen atoms at the same time. L ₁ , L ₂ and L ₃ each represent a methine group. A ₁ and A ₂ each represent an atomic group necessary for forming a benzene ring or a naphthalene ring.
R ₁ and L ₁ , and R ₂ and L ₃ may be bonded to each other to form a ring. M ₁ represents a charge balancing counter ion, and m ₁ represents a value required to neutralize the charge.

The alkyl group represented by R ₁ and R ₂ may be unsubstituted or may have a substituent, and preferably has 1 to 18 carbon atoms, for example, a methyl group or an ethyl group. , Propyl group, butyl group, pentyl group, octyl group, decyl group, dodecyl group and octadecyl group. Further, as the substituent when having a substituent,
There are sulfonic acid group, carboxy group, cyano group and the like.

The alkyl group represented by R ₃ and R ₄ may be unsubstituted or may have a substituent, and preferably has 1 to 10 carbon atoms, for example, a methyl group, An ethyl group is mentioned.

R ₁ and L ₁ and R ₂ and L ₃ may form a ring with each other. It is preferably a carbon atom forming an unsubstituted 5, 6 or 7 membered ring, and particularly preferably 6
It forms a carbon atom that forms a member ring.

R ₁ and R ₂ are preferably unsubstituted alkyl groups (eg methyl group, ethyl group, n-propyl group, n-butyl group) and sulfoalkyl groups (eg 2-
Sulfoethyl group, 3-sulfopropyl group, 4-sulfobobutyl group, 3-sulfobutyl group), R ₁ and L ₁ , R ₂
It is also preferable that L ₃ and L ₃ are bonded to each other to form a 5-membered ring or a 6-membered ring.

The aryl group represented by R ₃ and R ₄ may be unsubstituted or may have a substituent, and examples thereof include a phenyl group.

The heterocyclic group represented by R ₃ and R ₄ is, for example, 2-pyridyl group, 2-thiazoyl group, 2-
A furyl group and a 2-quinolyl group are exemplified.

R ₃ and R ₄ are preferably a hydrogen atom, a methyl group, an ethyl group, a phenyl group or the like.

The benzene ring or naphthalene ring completed by A ₁ and A ₂ may be unsubstituted or may have a substituent, and the substituent at this time is a halogen atom such as chlorine atom. Hydroxyl group; alkyl group such as methyl group;
Alkoxy groups such as methoxy and ethoxy groups; aryl groups such as phenyl groups; carboxy groups; cyano groups; amino groups;
Examples thereof include a sulfonic acid group.

Examples of M ₁ include halide ions (bromide ion, iodide ion, etc.), perchlorate ion, anion such as paratoluenesulfonate ion, and cations such as triethylammonium ion and sodium ion.

When the dye molecule itself forms an inner salt to maintain the charge balance, m ₁ is 0.

In the chemical formula 4, R ₁ and R ₂ each represent an alkyl group, and specific examples and preferred examples thereof are the same as those in the chemical formula 3.

R ₅ represents an alkyl group, an aryl group or a heterocyclic group, and specific examples thereof are the same as those listed for R ₃ and R ₄ in Chemical formula ₃ .

Of these, preferred are methyl groups,
Examples thereof include an ethyl group and a benzyl group.

The benzene ring or naphthalene ring completed by A ₁ and A ₂ , and the ring formed by R ₁ and a methine group and R ₂ and a methine group are the same as those in Chemical formula 3. Further, M ₁ and m ₁ are the same as those in Chemical formula 3.

Specific examples of thiadicarbocyanine dyes preferably used in the present invention are shown in Chemical formulas 5 to 18, but not limited thereto. Note that R ₁ and R in Chemical formula 5 are
The combination of _{2 and the} like is shown in Chemical formula 6, Chemical formula 7 and Chemical formula 8, and the combination of R ₁ and R ₂ in Chemical formula 15 is Chemical formula 16
It is shown in.

[0048]

[Chemical 5]

[0049]

[Chemical 6]

[0050]

[Chemical 7]

[0051]

[Chemical 8]

[0052]

[Chemical 9]

[0053]

[Chemical 10]

[0054]

[Chemical 11]

[0055]

[Chemical formula 12]

[0056]

[Chemical 13]

[0057]

[Chemical 14]

[0058]

[Chemical 15]

[0059]

[Chemical 16]

[0060]

[Chemical 17]

[0061]

[Chemical 18]

Among these, the anionic sensitizing dyes are
Probably used because it is stable even after dissolution of a complete emulsion to which a gelatin dispersion containing a dye-donating substance has been added, because the spectral sensitivity is likely to be sharpened probably because of good adsorption properties, and the oil solubility is low. Be done. Although the reason is not clear, anionic dyes are preferable because they are excellent in raw storage stability as compared with cationic dyes.

The above-mentioned sensitizing dyes may be used alone, or may be used in combination, or other known sensitizing dyes (for example, US Pat. No. 4,617,257, JP-A-59-180550). Issue No. 60-140335, R
D17029 (1978) pages 12 to 13 and the like). Especially, those combinations are often used for the purpose of supersensitization. A dye that does not itself have a spectral sensitizing effect or a compound that does not substantially absorb visible light and that exhibits supersensitization may be contained in the emulsion together with the sensitizing dye (see, for example, US Pat. 3615641, JP-A-63-23145, etc.).

The sensitizing dye in the present invention can be synthesized with reference to the following documents.

A) FM Hamer, "Heterocyclic Compounds-Cyanine Die and Relative Compounds- (Heterocycli
c Compounds-Cyanine dyes and related compounds)
(John Wiley and Sons
& Sons-New York, London-, 1964)

B) Day M Starmer (DMSturme
r) -Heterocyclic Compounds-Special topics in Heterocyclic Compounds-Special topics
in heterocyclic chemistry-) "(John Wiley & Sons, Inc.-New York, London, 1977)

The silver halide emulsion of the present invention is spectrally sensitized with the above-mentioned sensitizing dye, but in the present invention, it is combined with such a silver halide emulsion and spectrally sensitized with another sensitizing dye. Sensitive silver halide emulsions can be used. As another spectral sensitizing dye, a known cyanine dye,
Merocyanine dyes and composite merocyanine dyes are used. In addition to these, complex cyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes and hemioxonol dyes are used.

Specifically, US Pat. No. 4,617,257
No. 59-180550, 60-14033.
No. 5, RD17029 (1978) pages 12 to 13 and the like.

These sensitizing dyes, including those of the present invention, are 5 × 10 ⁻⁷ to 8 × 10 5 mol per mol of silver halide.
^-3 mol, preferably 1 x 10 ^-7 mol to 5 x 10 ^-3 mol, and particularly preferably 2 x 10 ^-7 mol to 2 x 10 ^-3 mol in the silver halide emulsion.

In the present invention, the sensitizing dye used in the light-sensitive material can be directly dispersed in the emulsion. Also,
These are first of all suitable solvents, for example methyl alcohol,
It may be added by dissolving it in an organic solvent or water (which may be alkaline or acidic) compatible with water such as ethyl alcohol, methyl cellosolve, acetone, fluorinated alcohol, dimethylformamide, propyl alcohol, etc. You may use 2 or more types together. It may also be added in the form of dispersion in a water / gelatin dispersion system or in the form of freeze-dried powder. Further, it may be added in the form of a powder dispersed with a surfactant or a solution.

(2) Method for adding sensitizing dye The sensitizing dye in the present invention may be added at any time basically. The sensitizing dye may be added to the silver halide emulsion at 50 ° C. or higher and 85 ° C. or lower. It is preferable to stir for 15 minutes or longer (preferably 30 minutes or longer).

That is, the addition timing is at the beginning of the formation of silver halide emulsion grains (may be added before the formation of nuclei), during or after the formation, or at the beginning, during or after the desalting step, and the gelatin may be added. May be at the time of redispersion, before or after chemical sensitization, during the process, or at the time of preparing the coating solution. It is preferably added during or after the formation of silver halide grains or before or after the chemical sensitization. The addition after chemical sensitization means that the sensitizing dye is added after all the chemicals necessary for chemical sensitization have been added.

The method of addition may be one time addition, or may be divided into several times and added in the same step or in different steps. The addition may be done gradually over time.

The amount of addition is 30% or more of the adsorption saturation coating amount 1
It is preferably added at 50% or less. More preferably, the added amount is 50% or more and 100% or less. here,
Adsorption saturation coverage is the amount of sensitizing dye required for the sensitizing dye to cover the entire surface of the silver halide emulsion grain, and can be calculated from the area occupied by the sensitizing dye on the surface of the silver halide emulsion grain. it can. For example, the occupied area of the thiadicarbocyanine dye of the present invention on the surface of silver halide emulsion grains can be calculated from the molar amount of the sensitizing dye added and the total surface area of the silver halide emulsion grains as about 100 A ² .

Even when the sensitizing dye is added before and after the formation of the silver halide grains and during the formation, even if the grain formation has to be carried out at a low temperature of 50 ° C. or lower, the subsequent step (for example, chemical sensitization) is performed at 50 ° C. The emulsion may be stirred for 15 minutes or longer at a temperature of 850 ° C. or higher and 850 ° C. or lower.
It is preferable to raise the temperature to 5 ° C. or lower and stir the emulsion for 15 minutes or longer. The sensitizing dye may be added and the emulsion may be stirred at a temperature of 50 ° C. or higher and 85 ° C. or lower. In the addition of sensitizing dye at the time of silver halide grain formation, if the sensitizing dye is added all at once, the amount of sensitizing dye added is close to the saturated coating amount. Since it may cause a problem, the sensitizing dye may be added continuously or in several times.

In the desalting step, a gelatin flocculating and precipitating agent (for example, those described in JP-A-58-140322) is used, and examples thereof include those shown in Chemical formula 19. Chemical 1
In order to prevent the inhibition of the adsorption of the sensitizing dye, P-2 of 9 is particularly preferably added to the silver halide grain formation before the desalting step and after the formation. When the sensitizing dye is added after the desalting step (including the chemical sensitization), P-1 of Chemical formula 19 with less inhibition of adsorption of the sensitizing dye is preferably used. Alternatively, a desalting step using an ultrafiltration device described in U.S. Pat. No. 4,758,505 is also preferable in terms of adsorption of the sensitizing dye.

[0077]

[Chemical 19]

Further, in the present invention, a nitrogen-containing heterocyclic compound, particularly a tetraazaindene compound (preferably 4-hydroxy-6-methyl-), which is used for stabilization of raw storage, control of chemical sensitization and suppression of fogging is used. (1, 3, 3
It is preferable to stir at a temperature of 50 ° C. or higher and 85 ° C. or lower for 15 minutes or longer (preferably 30 minutes or longer) with the a, 7) -tetraazaindene) and the sensitizing dye present in the emulsion. By doing so, it is possible to enhance the adsorption of the sensitizing dye.

Among them, in the chemical sensitization method in the presence of a nitrogen-containing heterocyclic compound, especially a tetraazaindene compound (JP-A-62-255159), the sensitizing dye is added at the time of silver halide grain formation. In the present invention, the preferred chemical sensitization method may be used at the beginning, in the middle and after the end, or at the beginning, the middle and the end of the desalting step, during the gelatin redispersion, during the chemical sensitization or before and after the chemical sensitization. is there.

In particular, in the emulsion of the present invention which is spectrally sensitized with a thiadicarbocyanine dye, it is preferable to carry out chemical sensitization in the presence of the thiadicarbocyanine dye and the tetraazaindene compound.

In this case, the addition timing of the thiadicarbocyanine dye and the tetraazaindene compound is not particularly limited as long as both compounds are present at one time during the chemical sensitization.
It is preferred to add both compounds together.

Further, when the sensitizing dye is added in a step other than the chemical sensitization, it is preferable to add the tetraazindene compound together, but basically, the sensitizing dye and the tetraazaindene compound are added together. Emulsion in the presence of 50 ° C or higher 8
If stirring at 5 ° C. or lower for 15 minutes or longer (preferably 30 minutes or longer), the tetraazaindene compound may be added in the subsequent step or the step before that.

In the above, when the sensitizing dye and the tetraazaindene compound are added together, there may be a difference of about 10 seconds to 10 minutes in the timing of addition of both compounds, and the order of addition may be any. It may be. Also, a mixture of a sensitizing dye and a tetrazaindene compound may be added.

In addition, before and after the addition of the sensitizing dye,
Soluble calcium compounds, soluble iodides, soluble bromides, soluble chlorides, soluble thiocyanates may be added together. Preferably, KI, CaCl ₂ ,
It is preferable to use KCl, KBr, KSCN, or the like.

(3) Basic Structure of Silver Halide Grain and Preparation Method Silver halide which can be used in the present invention includes silver chloride, silver bromide,
Any of silver iodobromide, silver chlorobromide, silver iodochloride, and silver chloroiodobromide may be used, but silver iodobromide, silver chloride, silver bromide containing 10 mol% or less of silver iodide is preferred. It is silver chlorobromide.

The silver halide emulsion used in the present invention may be either a surface latent image type or an internal latent image type. The internal latent image type emulsion is used as a direct reversal emulsion in combination with a nucleating agent or a light fogging. Further, it may be a so-called multi-structured grain having different halogen compositions inside the grain and on the grain surface. Of the multi-structure grains, those having a double structure are sometimes called a core-shell emulsion.

The silver halide emulsion used in the present invention is preferably a monodisperse emulsion and is disclosed in JP-A-3-110555.
The coefficient of variation described in No. 20 is preferably 20% or less.
More preferably 16% or less, further preferably 10%
It is below. However, the present invention is not limited to this monodisperse emulsion.

The average grain size of the silver halide grains used in the present invention is 0.1 μm to 2.2 μm, preferably 0.1 μm to 1.2 μm. More preferably,
It is 0.1 μm to 0.8 μm.

The crystal habit of the silver halide grains may be cubic, octahedral, tabular with a high aspect ratio, potato-like or the like.

Specifically, US Pat. No. 4,500,626, column 50, US Pat. No. 4,628,012, Research Disclosure (hereinafter abbreviated as RD) 17029 (197).
8 years) and any of the silver halide emulsions described in JP-A No. 62-25159 can be used.

In the process of preparing the silver halide emulsion of the present invention, when a so-called desalting step for removing excess salt is carried out, as a means for this purpose, gel washing of gelatin which has been known for a long time is carried out by gel washing with Nudel. The method may also be used, and inorganic salts consisting of polyvalent anions such as sodium sulfate, anionic surfactants, anionic polymers (such as polystyrene sulfonic acid), or gelatin derivatives (such as aliphatic acylated gelatin, aromatic acyl). The precipitation method (flocculation) using denatured gelatin, aromatic carbamoylated gelatin, etc. may be used. Preferably, the precipitation method using a compound represented by Chemical formula 19 is used, but the present invention is not limited thereto. The removal of excess salt may be omitted. Alternatively, U.S. Pat. No. 4,758,505, JP-A-62-11
No. 3137, Japanese Patent Publication No. 59-43727, US Patent No. 4
Excess salt may be removed using the ultrafiltration system shown in 334012.

The silver halide emulsion used in the present invention may contain heavy metals such as iridium, rhodium, platinum, cadmium, zinc, thallium, lead, iron, chromium, ruthenium and rhenium for various purposes. These compounds are
They may be used alone or in combination of two or more. The addition amount depends on the purpose of use, but is generally about 10 ^-9 to 10 ^-3 mol per mol of silver halide. When it is contained, it may be uniformly added to the particles, or may be localized on the surface or inside of the particles.

In the present invention, in the step of forming silver halide grains, as a silver halide solvent, rhodan salt, NH ₃ ,
And compounds such as those shown in Chemical Formula 20 and Japanese Patent Publication No.
The organic thioether derivative described in 1386 or the sulfur-containing compound described in JP-A-53-144319 can be used.

[0094]

[Chemical 20]

A nitrogen-containing compound as described in JP-B-46-7781, JP-A-60-222842, JP-A-60-122935 and the like can be added in the step of forming silver halide grains. ..

Gelatin is advantageously used as the protective colloid used in the preparation of the emulsion of the present invention and as the binder for other hydrophilic colloids, but other hydrophilic colloids can also be used.

For example, gelatin derivatives, graft polymers of gelatin and other polymers, proteins such as albumin and casein; cellulose derivatives such as hydroxyethyl cellulose and cellulose sulfates, sodium alginate, starch derivatives; polyvinyl alcohol, polyvinyl alcohol moieties. Various synthetic hydrophilic polymer substances such as acetal, poly-N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole, polyvinylpyrazole, and other single or copolymers can be used.

Examples of gelatin include lime-processed gelatin, acid-processed gelatin, bulletin and society of gelatin.
The Scientific, Photography of Japan (Bull.Soc.Sci.Phot., Japan), Number (No.) 1
6, an enzyme-treated gelatin as described in P. 30 (1966) may be used, and a hydrolyzed product or an enzymatically decomposed product of gelatin may also be used.

For other conditions, see the graph
(P.Glafkides), Chemieet Physique Photographique (Paul Montel, 1967), GFD Duffin, Photographic Emulsion Chemistry (Photographic Emulsi)
on Chemistry) [The Focal P
ress), 1966], VL Zelikman et al, Making and Coating Photographic Emulsion (Making
and Coating Photographic Emulsion [The Focal Press, 1964]. That is, any of an acidic method, a neutral method and an ammonia method may be used, and as a method of reacting a soluble silver salt and a soluble halogen salt, any of a one-sided mixing method, a simultaneous mixing method and a combination thereof may be used.

It is also possible to use a method of forming grains in the presence of excess silver ions (so-called reverse mixing method). As one form of the simultaneous mixing method, a method of keeping pAg constant in a liquid phase in which silver halide is produced, that is, a so-called controlled or double jet method can be used.

Further, in order to accelerate the grain growth, the addition concentration, the addition amount or the addition rate of the silver salt and the halogen salt to be added may be increased (JP-A-55-142329, JP-A-55-158124, US Pat. No. 3650757).

During or after grain formation, the surface of the silver halide grain may be replaced with halogen which forms a hardly soluble silver halide grain.

The reaction solution may be stirred by any known stirring method. The temperature and pH of the reaction solution during the formation of silver halide grains may be set arbitrarily.

(4) Chemical Sensitization The silver halide emulsion used in the present invention may be used in a non-post-ripening (unchemical sensitized) state, but a method in which chemical sensitization is performed to increase the sensitivity. Is preferred.

The chemical sensitization may be any of sulfur sensitization, gold sensitization, reduction sensitization, or a combination thereof.

In addition, chemical sensitization with a compound containing a chalcogen element other than sulfur such as selenium and tellurium, or chemical sensitization with a noble metal such as palladium or iridium may be combined with the above chemical sensitization.

Also, 4-hydroxy-6-methyl-
A method in which an inhibitor such as (1,3,3a, 7) -tetrazaindene is added at the beginning, in the middle, or after the chemical sensitization is also preferably used.

Particularly, in the emulsion of the present invention, as described above,
Chemical sensitization is preferably carried out in the presence of a thiadicarbocyanine dye and a tetraazaindene compound.

The sulfur sensitizer is a compound containing sulfur capable of reacting with active gelatin or silver, and examples thereof include thiosulfate, allylthiocarbamide, thiourea, allylisothiacyanate, cystine and p-toluenethiosulfone. Acid salts, rhodanes, mercapto compounds and the like are used.

In addition, US Pat. Nos. 1,574,944, 2,410,689, 22,789,47 and 27,286.
Those described in No. 68, No. 3656955 and the like can also be used.

[0111] The coating amount of the photosensitive silver halide used in the present invention, to terms of silver 1 g / m ² not in the range of 10 g / m ^2.

In the present invention, an organic metal salt may be used as an oxidizing agent together with the photosensitive silver halide. Among such organic metal salts, organic silver salts are particularly preferably used.

Organic compounds that can be used to form the above organic silver salt oxidizing agent include US Pat. No. 4,500,626.
There are benzotriazoles, fatty acids and other compounds described in Nos. 52 to 53 and the like. In addition, JP-A-60-1132
No. 35, a silver salt of a carboxylic acid having an alkynyl group such as silver phenylpropiolate, and JP-A-61-249.
The acetylene silver described in No. 044 is also useful. Two or more kinds of organic silver salts may be used in combination.

The above organic silver salts are photosensitive silver halides.
0.01 to 10 moles per mole, preferably 0.1.
01 to 1 mol can be used in combination. The total coating amount of photosensitive silver halide and organic silver salt is 50 mg / m ^{2 in} terms of silver.
Approximately 10 g / m ² is suitable.

Various antifoggants or photographic stabilizers can be used in the invention. Examples thereof include azoles and azaindenes described on pages 24 to 25 of RD17643 (1978), JP-A-59-1684.
42-containing nitrogen-containing carboxylic acids and phosphoric acids,
Alternatively, mercapto compounds and metal salts thereof described in JP-A-59-111636, acetylene compounds described in JP-A-62-87957 and the like can be used.

A hydrophilic binder is preferably used as the binder of the constituent layers of the light-sensitive material and the dye-fixing element. As an example thereof, pages (26) to (2) of JP-A-62-253159.
8) The thing described in page is mentioned. Specifically, a transparent or translucent hydrophilic binder is preferable, and for example, gelatin, proteins such as gelatin derivatives or cellulose derivatives, natural compounds such as polysaccharides such as starch, gum arabic, dextran and pullulan, and polyvinyl alcohol, Examples thereof include polyvinylpyrrolidone, acrylamide polymer, and other synthetic polymer compounds. Furthermore, superabsorbent polymers described in JP-A-62-245260, i.e. -COOM or -SO ₃ M (M is a hydrogen atom or an alkali metal) homopolymer or a vinyl monomer together or with other vinyl monomers with A copolymer with a vinyl monomer (for example, sodium methacrylate, ammonium methacrylate, Sumika Gel L-5H manufactured by Sumitomo Chemical Co., Ltd.) is also used. These binders can be used in combination of two or more.

When a system in which a small amount of water is supplied for thermal development is adopted, it is possible to quickly absorb water by using the above superabsorbent polymer.
Also, the use of superabsorbent polymers in the dye-fixing layer or its protective layer can prevent the dye from retransferring from the dye-fixing element to another after transfer.

In the present invention, the coating amount of the binder is 1
It is preferably 20 g or less per m ² , particularly 10 g or less, and more preferably 7 g or less.

A constituent layer (including a back layer) of a light-sensitive material or a dye-fixing element is used for the purpose of improving physical properties of a film such as dimensional stability, curl prevention, adhesion prevention, film cracking prevention, and pressure increase / decrease prevention. Various polymer latices can be included. Specifically, any of the polymer latexes described in JP-A Nos. 62-245258, 62-136648, 62-110066 and the like can be used. In particular,
When a polymer latex having a low glass transition point (40 ° C. or less) is used in the mordant layer, cracking of the mordant layer can be prevented, and when a polymer latex having a high glass transition point is used in the back layer, a curl preventing effect can be obtained. ..

As the reducing agent used in the present invention, those known in the field of photothermographic materials can be used. Further, a dye-donor compound having a reducing property described later is also included (in this case, other reducing agents can be used together). Further, a reducing agent precursor which has no reducing property by itself but exhibits a reducing property by the action of a nucleophile or heat during the development process can also be used.

Examples of the reducing agent used in the present invention include:
U.S. Pat. No. 4,500,626, columns 49-50, 44
No. 83, col. 30, columns 31-43617;
No. 4,590,152, JP-A No. 60-140335, pages (17) to (18), Nos. 57-40245, 56.
-138736, 59-178458, 59-
No. 53831, No. 59-182449, No. 59-18
No. 2450, No. 60-119555, No. 60-128
436 to 60-128439, 60-1
No. 98540, No. 60-181742, No. 61-25.
9253, 624244044, 62-131
From 253 to 62-131256, there are reducing agents and reducing agent precursors described in EP 220746A2, pages 78 to 96, and the like.

Combinations of various reducing agents such as those disclosed in US Pat. No. 3,039,869 can also be used.

When a diffusion resistant reducing agent is used, if necessary, an electron transfer agent and / or an electron transfer agent may be added in order to promote electron transfer between the diffusion resistant reducing agent and the developable silver halide.
Alternatively, an electron transfer agent precursor can be used in combination.

The electron transfer agent or its precursor can be selected from the above-mentioned reducing agents or its precursors. It is desirable that the electron transfer agent or the precursor thereof has a mobility higher than that of the diffusion resistant reducing agent (electron donor). A particularly useful electron transfer agent is 1-phenyl-3-
It is a pyrazolidone or an aminophenol.

The diffusion-resistant reducing agent (electron donor) used in combination with the electron transfer agent may be any one of the above reducing agents which does not substantially move in the layer of the light-sensitive material.
Hydroquinones, sulfonamide phenols, sulfonamide naphthols, JP-A-53-11 are preferred.
Examples thereof include compounds described as electron donors in No. 0827, and dye-donating compounds having diffusion resistance and reducing properties described later.

In the present invention, the reducing agent is added in an amount of 0.01 to 20 moles, and particularly preferably 0.1 to 1 mole of silver.
10 to 10 mol.

The dye-providing compound (also referred to as a dye-providing substance) used in the present invention is diffusible (corresponding to this reaction, or vice versa) when reduced to silver ion under high temperature conditions. A compound that produces or releases a (mobile) dye.

As an example of the dye-donating compound that can be used in the present invention, first, a compound (coupler) which forms a dye by an oxidative coupling reaction can be mentioned. The coupler may be a 4-equivalent coupler or a 2-equivalent coupler. A 2-equivalent coupler having a diffusion resistant group as a leaving group and forming a diffusible dye by an oxidative coupling reaction is also preferable. This nondiffusible group may form a polymer chain. Specific examples of color developers and couplers are TH James
"The Theory of the Photographic Process" Fourth Edition 2
91-334 pages, and 354-361 pages, JP-A-58.
-123533, 58-149046, 58-
149047, 59-11148, and 59-1
24399, 59-174835, 59-23.
1539, 59-231540, 60-295.
No. 0, No. 60-2951, No. 60-14242, No. 60-23474, No. 60-66249 and the like.

In addition, as another example of the dye-donating compound,
Examples thereof include compounds having a function of releasing or diffusing a diffusible dye imagewise. This type of compound can be represented by the following general formula [LI].

(Dye-Y) n-Z [LI]

Dye represents a dye group, a temporarily shortened dye group or a dye precursor group, Y represents a simple bond or linking group, and Z corresponds to a photosensitive silver salt having an imagewise latent image. Or, conversely, a difference is caused in the diffusivity of the compound represented by (Dye-Y) n-Z, or Dye is released and the released Dye and (Dye-Y) n-Z Represents a group having a property of causing a difference in diffusibility between them, n represents 1 or 2, and when n is 2, two Dye-Y may be the same or different.

Specific examples of the dye-donating compound represented by the general formula [LI] include the following compounds (1) to (3). The following items (1) to (5) are for forming a diffusible dye image (positive dye image) in the opposite manner to the development of silver halide, and "and" are the diffusible dye image (corresponding to the development of silver halide). To form a negative dye image).

US Pat. Nos. 3,134,764 and 336.
2819, 3597200, and 3544545.
No. 3,482,972 and the like. A dye developer in which a hydroquinone-based developer and a dye component are linked. This dye developing agent is diffusible in an alkaline environment, but becomes non-diffusible when it reacts with silver halide.

As described in US Pat. No. 4,053,137, a non-diffusible compound which releases a diffusible dye in an alkaline environment but loses its ability when reacted with silver halide can be used. For example, US Pat.
Compounds releasing a diffusible dye by an intramolecular nucleophilic substitution reaction described in 980479 and the like, US Pat. No. 4,1993.
No. 54 and the like, compounds that release a diffusible dye by an intramolecular rewinding reaction of the isoxazolone ring can be mentioned.

US Pat. No. 4,559,290, European Patent 220720A2, US Pat. No. 4,783,396,
As described in Published Technical Report 87-6199, a non-diffusible compound which reacts with a reducing agent remaining without being oxidized by development to release a diffusible dye can also be used.

As an example thereof, US Pat. No. 4,133,938.
No. 9, 4139379, JP-A-59-185333.
Nos. 57-84453 and the like, which release a diffusible dye by a nucleophilic substitution reaction in the molecule after reduction, US Pat. No. 4,232,107, JP-A-59
No. 101649, No. 61-88257, RD240
25 (1984) and the like, which release a diffusible dye by an intramolecular electron transfer reaction after reduction, West German Patent No. 3008588A, JP-A-56-14.
2530, US Pat. Nos. 4,343,893 and 4619.
Compounds which release a diffusible dye by cleavage of a single bond after reduction as described in US Pat.
Examples thereof include nitro compounds described in U.S. Pat. No. 223 and the like that release a diffusible dye after electron acceptance, compounds described in U.S. Pat. No. 4,609,610 and the like that release a diffusible dye after electron acceptance.

Further, more preferable ones are European Patent No. 220746A2, Open Technical Report 87-6199, US Pat. No. 4,783,396, and Japanese Patent Laid-Open No. 63-201653.
No. 63, 2016-654, etc.
A compound having an -X bond (X represents an oxygen, sulfur or nitrogen atom) and an electron-withdrawing group, Japanese Patent Application No. 62-106885.
No. ₂ within one molecule of SO ₂ -X (X is as defined above)
And a compound having an electron-withdrawing group, JP-A-63-2713
A compound having a PO-X bond (X has the same meaning as described above) and an electron-withdrawing group in one molecule described in JP-A-44-
The compound having a C—X ′ bond (X ′ has the same meaning as X or represents —SO ₂ —) and an electron-withdrawing group in one molecule described in No. 271341. Also, Japanese Patent Application Sho 62
Compounds described in JP-A-319989 and JP-A-62-320771, in which a single bond is cleaved after reduction by a π bond conjugated with an electron-accepting group to release a diffusible dye, can also be used.

Of these, a compound having an N—X bond and an electron-withdrawing group in one molecule is particularly preferable. Specific examples thereof include European Patent No. 220746A2 or US Patent No. 47833.
96-compounds (1)-(3), (7)-
(10), (12), (13), (15), (23)-
(26), (31), (32), (35), (40),
(41), (44), (53) to (59), (64),
(70), Compound (11) to Open Technical Report 87-6199
(23) and so on.

A compound (DDR coupler) which is a coupler having a diffusible dye as a leaving group and releases the diffusible dye by a reaction with an oxidized form of a reducing agent. Specifically, British Patent No. 1330524, Japanese Patent Publication No. 48-39165, US Patent Nos. 3443940, 4474867, and 448.
3914 and the like.

A compound (DRR compound) which is reducible to a silver halide or an organic silver salt and releases a diffusible dye when its partner is reduced. Since this compound does not need to use any other reducing agent, it is preferable because there is no problem of image contamination due to oxidative decomposition products of the reducing agent. Typical examples thereof are U.S. Pat. Nos. 3,928,312, 40,53312, and 405.
No. 5428, No. 4336322, JP-A-59-658.
No. 39, No. 59-69839, No. 53-3819,
51-104343, RD17465, U.S. Pat. Nos. 3,725,062, 3,728,113, and 3,443.
939, JP-A-58-116537, and JP-A-57-17.
9840, U.S. Pat. No. 4,500,626 and the like. Specific examples of the DRR compound include the compounds described in the above-mentioned U.S. Pat. No. 4,500,626, columns 22 to 44. Among them, the compounds (1) to (3) described in the above-mentioned U.S. Pat. (10) to (13), (1
6) to (19), (28) to (30), (33) to (3
5), (38) to (40) and (42) to (64) are preferable. The compounds described in US Pat. No. 4,639,408, columns 37 to 39 are also useful.

Other than the above-mentioned couplers and dye-providing compounds other than the general formula [LI], dye silver compounds in which an organic silver salt and a dye are bonded (Research Disclosure, May 1978, pp. 54-58). , Etc., azo dyes used in the heat-development silver dye bleaching method (US Pat.
957, Research Disclosure, 1976.
April issue, pages 30 to 32), leuco dyes (US Pat. Nos. 3,985,565 and 4,022,617), and the like can be used.

Hydrophobic additives such as dye-providing compounds and diffusion-resistant reducing agents can be incorporated into the layers of the photographic material by known methods such as the method described in US Pat. No. 2,322,027. In this case, JP-A-59-83154,
59-178451, 59-178452, 59-178453, 59-178454, 5
9-178455, 59-178457 and the like, a high boiling point organic solvent, if necessary, a boiling point of 50 ° C.
It can be used in combination with an organic solvent having a low boiling point of up to 160 ° C.

The amount of the high boiling point organic solvent is 10 g or less, preferably 5 g or less, relative to 1 g of the dye-donor compound used. Also, 1 cc or less, more preferably 0.5 cc or less, especially 0.3 cc or less is suitable for 1 g of the binder.

JP-B-51-39853, JP-A-51-
A dispersion method using a polymer described in 59943 can also be used.

In the case of a compound which is substantially insoluble in water, fine particles can be dispersed and contained in a binder in addition to the above method.

When dispersing the hydrophobic compound in the hydrophilic colloid, various surfactants can be used. For example, JP-A-59-157636, (37) to (38)
The surfactants listed on the page can be used.

In the present invention, a compound capable of activating development and stabilizing an image at the same time can be used in the light-sensitive material. The specific compounds preferably used are described in US Pat. No. 4,500,626, columns 51 to 52.

In a system for forming an image by diffusion transfer of a dye, a dye fixing element is used together with a light-sensitive material. The dye fixing element may be applied separately on a support different from the light-sensitive material, or may be applied on the same support as the light-sensitive material. Regarding the relationship between the light-sensitive material and the dye fixing element, the relationship with the support, and the relationship with the white reflective layer, the relationship described in column 57 of US Pat. No. 4,500,626 can be applied to the present application.

The dye fixing element preferably used in the present invention has at least one layer containing a mordant and a binder. As the mordant, those known in the photographic field can be used, and specific examples thereof include US Pat. No. 4,500,626, columns 58 to 59 and JP-A No. 61-88256 (32).
The mordant described on page (41), JP-A-62-244043.
No. 62-244036 and the like. Further, a dye-receptive polymer compound as described in US Pat. No. 4,463,079 may be used. If necessary, the dye-fixing element may have a protective layer, a release layer,
An auxiliary layer such as an anti-curl layer can be provided. In particular, it is useful to provide a protective layer.

In the constituent layers of the light-sensitive material and the dye-fixing element, a plasticizer, a slipping agent, or a high boiling point organic solvent can be used as an agent for improving the releasability of the light-sensitive material and the dye-fixing element. A specific example is (2) in JP-A-62-253159.
5), No. 62-245253 and the like.

Further, various silicone oils (all silicone oils from dimethylsilicone oil to modified silicone oils obtained by introducing various organic groups into dimethylsiloxane) can be used for the above purpose. As examples thereof, various modified silicone oils described in “Modified Silicone Oil” technical data P6-18B issued by Shin-Etsu Silicone Co., Ltd., particularly carboxy-modified silicone (trade name X-22-3710) are effective.

Further, JP-A-62-215953 and 63
The silicone oil described in JP-A-46449 is also effective.

An anti-fading agent may be used in the light-sensitive material and the dye fixing element. As the anti-fading agent, there are, for example, an antioxidant, an ultraviolet absorber, or a metal complex of some kind.

Examples of antioxidants include chroman compounds, coumarane compounds, phenol compounds (eg hindered phenols), hydroquinone derivatives, hindered amine derivatives and spiroindane compounds. The compounds described in JP-A-61-159644 are also effective.

As the ultraviolet absorber, benzotriazole compounds (US Pat. No. 3,533,794, etc.), 4-
Thiazolidone compounds (US Pat. No. 3,352,681, etc.), benzophenone compounds (JP-A-46-2784)
Etc.) and others, JP-A-54-48535 and JP-A-62-
There are compounds described in Nos. 136641 and 61-88256. Further, the ultraviolet absorbing polymer described in JP-A-62-260152 is also effective.

Examples of the metal complex include US Pat.
55, 42425018, columns 3 to 36, 4254.
195, columns 3 to 8, JP-A-62-174741, JP-A-61-88256, pages (27) to (29), and JP-A-63-1.
99248, JP-A-1-75568, and JP-A-1-742.
72, etc. are available.

Examples of useful anti-fading agents are disclosed in JP-A-62-21.
5272 (125)-(137). The anti-fading agent for preventing the fading of the dye transferred to the dye-fixing element may be contained in the dye-fixing element in advance, or may be supplied to the dye-fixing element from the outside such as a light-sensitive material. ..

The above-mentioned antioxidant, ultraviolet absorber and metal complex may be used in combination.

A fluorescent whitening agent may be used in the light-sensitive material and the dye fixing element. In particular, it is preferable that the dye fixing element contains a fluorescent whitening agent or is supplied from the outside such as a light-sensitive material. For example, see “The Chemis” edited by K. Veenkataraman.
Try of Synthetic Dyes ", Volume V, Chapter 8, JP-A-61-
The compound described in 143752 etc. can be mentioned. More specifically, stilbene compounds, coumarin compounds, biphenyl compounds, benzoxazolyl compounds, naphthalimide compounds, pyrazoline compounds, carbostyryl compounds and the like can be mentioned. The fluorescent whitening agent can be used in combination with an anti-fading agent.

As the hardener used for the constituent layers of the light-sensitive material and the dye fixing element, US Pat. No. 4,678,739, No. 41 is used.
Column, JP-A-59-116655 and JP-A-62-24526.
No. 1, No. 61-18942 and the like. More specifically, aldehyde hardeners (formaldehyde etc.), aziridine hardeners, epoxy hardeners, vinyl sulfone hardeners (N, N'-ethylene-bis (vinylsulfonylacetamide)) Ethane), N-
Examples thereof include methylol type hardeners (such as dimethylol urea) and polymer hardeners (compounds described in JP-A-62-234157).

In the constituent layers of the light-sensitive material and the dye-fixing element, various surfactants can be used for the purpose of coating aid, improvement of releasability, improvement of slipperiness, prevention of electrification, acceleration of development and the like. Specific examples of the surfactant are disclosed in JP-A-62-173463.
No. 62-183457 and the like.

The constituent layers of the light-sensitive material and the dye-fixing element may contain an organic fluoro compound for the purpose of improving slipperiness, preventing electrification, improving releasability and the like. Typical examples of the organic fluoro compounds include Japanese Examined Patent Publication No. 57-9053, columns 8 to 17,
Fluorine-based surfactants described in JP-A Nos. 61-20944 and 62-135826, oil-based fluorine-based compounds such as fluorine oil, and solid fluorine-containing compound resins such as tetrafluoroethylene resin. Hydrophobic fluorine compounds may be mentioned.

A matting agent can be used in the light-sensitive material and the dye fixing element. Matting agents such as silicon dioxide, polyolefins, polymethacrylates, etc.
In addition to the compounds described on page 1-88256 (29), benzoguanamine resin beads, polycarbonate resin beads, AS resin beads and the like are disclosed in JP-A-63-274944.
No. 63-274952.

In addition, the constituent layers of the light-sensitive material and the dye-fixing element may contain a thermal solvent, a defoaming agent, an antibacterial / antifungal agent, colloidal silica and the like. Specific examples of these additives are described in JP-A No. 61-88256, pages (26) to (32).

In the present invention, an image formation accelerator can be used in the light-sensitive material and / or the dye fixing element.
The image forming accelerator includes a redox reaction between a silver salt oxidizing agent and a reducing agent, a reaction such as generation of a dye from a dye-donor substance, decomposition of the dye or release of a diffusible dye, and a light-sensitive material layer. From the physicochemical functions, such as bases or base precursors, nucleophilic compounds, high boiling organic solvents (oils), thermal solvents, surfactants, silver Alternatively, they are classified into compounds that interact with silver ions. However, these substance groups generally have a composite function, and usually have some of the above-mentioned promoting effects together. These details are described in US Pat. No. 4,678,739, columns 38 to 40.

Examples of the base precursor include salts of an organic acid and a base that are decarboxylated by heat, compounds that release amines by intramolecular nucleophilic substitution reaction, Rossen rearrangement or Beckmann rearrangement. A specific example is US Pat. No. 45114.
93, JP-A-62-65038 and the like.

In a system in which heat development and dye transfer are carried out simultaneously in the presence of a small amount of water, it is preferable to add a base and / or a base precursor to the dye-fixing element in order to enhance the storability of the light-sensitive material.

In addition to the above, European Patent Publication 210660
And US Pat. No. 4,740,445, a combination of a sparingly soluble metal compound and a compound capable of complex-forming reaction with a metal ion constituting the sparingly soluble metal compound (referred to as a complex-forming compound), and JP-A-61-232451. Compounds that generate a base by electrolysis as described in No. 1 can also be used as the base precursor. The former method is particularly effective. It is advantageous to add the sparingly soluble metal compound and the complex-forming compound separately to the light-sensitive material and the dye fixing element.

In the present invention, various development stoppers can be used in the light-sensitive material and / or the dye-fixing element for the purpose of always obtaining a constant image against variations in processing temperature and processing time during development.

The term "development terminator" as used herein means, after proper development,
A compound that rapidly neutralizes or reacts with a base to lower the concentration of the base in the film to stop development, or a compound that interacts with silver and a silver salt to suppress development. In particular,
Examples thereof include acid precursors that release an acid upon heating, electrophilic compounds that undergo a substitution reaction with a coexisting base upon heating, or nitrogen-containing heterocyclic compounds, mercapto compounds and precursors thereof. For more details, see JP-A-62-2531.
No. 59 (31) to (32).

In the present invention, as the support for the light-sensitive material and the dye fixing element, those which can withstand the processing temperature are used. Generally, paper, synthetic polymer (film)
Is mentioned. Specifically, polyethylene terephthalate, polycarbonate, polyvinyl chloride, polystyrene, polypropylene, polyimide, celluloses (for example, triacetyl cellulose) or those films containing a pigment such as titanium oxide, and polypropylene are used. Film-processed synthetic paper, mixed paper made from synthetic resin pulp such as polyethylene and natural pulp, Yankee paper, baryta paper, coated paper (particularly cast coated paper), metal, cloth, glass and the like are used.

These can be used alone or
It can also be used as a support having one or both sides laminated with a synthetic polymer such as polyethylene.

In addition, the supports described in JP-A No. 62-253159, pages (29) to (31) can be used.

On the surface of these supports, a hydrophilic binder and a semiconductive metal oxide such as alumina sol or tin oxide,
You may apply carbon black and other antistatic agents.

As a method for exposing and recording an image on a light-sensitive material, for example, a method of directly photographing a landscape or a person by using a camera, a method of exposing through a reversal film or a negative film by using a printer or an enlarger, A method of scanning and exposing an original image through a slit or the like using an exposure device of a copying machine, a method of exposing image information by emitting light from a light emitting diode or various lasers through an electric signal, a CRT, a liquid crystal display, There is a method of outputting to an image display device such as an electroluminescence display and a plasma display, and exposing directly or through an optical system.

As a light source for recording an image on a photosensitive material,
As described above, US Patent No. 4 of natural light, tungsten lamp, light emitting diode, laser light source, CRT light source, etc.
The light source described in 500626, column 56 can be used.

Image exposure can also be performed using a wavelength conversion element in which a nonlinear optical material and a coherent light source such as a laser beam are combined. Here, the non-linear optical material is a material capable of exhibiting non-linearity between polarization and an electric field that appears when a strong optical electric field such as laser light is applied, and includes lithium niobate and potassium dihydrogen phosphate (KD).
P), inorganic compounds represented by lithium iodate, BaB ₂ O _4, etc., urea derivatives, nitroaniline derivatives, for example, nitropyridine-N such as 3-methyl-4-nitropyridine-N-oxide (POM). -Oxide derivatives, JP-A-61-53462 and JP-A-62-210432
The compounds described in No. 10 are preferably used. As a form of the wavelength conversion element, a single crystal optical waveguide type, a fiber type and the like are known, and any of them is useful.

Further, the image information is a video camera,
An image signal obtained from an electronic still camera or the like, a television signal represented by Nippon Television Signal Standard (NTSC),
An image signal obtained by dividing an original image into a large number of pixels such as a scanner, or an image signal created by using a computer represented by CG and CAD can be used.

The light-sensitive material and / or the dye fixing element are
It may have a form having a conductive heating element layer as a heating means for heat development or dye diffusion transfer. In this case, the transparent or opaque heating element is disclosed in JP-A-61
Those described in, for example, the specification of 145544 can be used.
Note that these conductive layers also function as antistatic layers.

The heating temperature in the heat development step is about 50 ° C to about 2 ° C.
It can be developed at 50 ° C, but especially from about 80 ° C to about 180 ° C.
Is useful. The dye diffusion transfer process may be performed simultaneously with the heat development, or may be performed after the end of the heat development process.
In the latter case, the heating temperature in the transfer step can be set within the range from the temperature in the heat development step to room temperature, but especially 50 ° C.
Above all, it is more preferable that the temperature is lower by about 10 ° C. than the temperature in the heat development step.

Although the migration of the dye occurs only by heat,
Solvents may be used to facilitate dye transfer. Also,
As described in detail in JP-A-59-218443 and JP-A-61-238056, a method of performing development and transfer simultaneously or continuously by heating in the presence of a small amount of solvent (particularly water) is also useful. is there. In this method, the heating temperature is 50 ° C.
As described above, the boiling point of the solvent or less is preferable, and for example, when the solvent is water, the temperature is preferably 50 ° C or higher and 100 ° C or lower.

Examples of the solvent used for accelerating the development and / or transferring the diffusible dye to the dye fixing layer include water or a basic aqueous solution containing an inorganic alkali metal salt or an organic base (these bases). Examples thereof include those described in the section of the image formation accelerator). Further, a low boiling point solvent, or a mixed solution of a low boiling point solvent and water or a basic aqueous solution can be used. Further, a surfactant, an antifoggant, a sparingly soluble metal salt and a complex-forming compound, etc. may be contained in the solvent.

These solvents can be used by a method of applying them to the dye fixing element, the light-sensitive material or both.
The amount used may be as small as the weight of the solvent corresponding to the maximum swelling volume of the entire coating film or less (particularly the amount of the solvent corresponding to the maximum swelling volume of the entire coating film less the weight of the total coating film).

As a method of applying a solvent to the photosensitive layer or the dye fixing layer, for example, there is a method described in JP-A-61-147244, page (26). Alternatively, the solvent may be contained in a microcapsule, and may be incorporated in the light-sensitive material or the dye-fixing element or both in advance.

Further, in order to promote dye transfer, a system in which a hydrophilic thermal solvent which is solid at room temperature and dissolves at high temperature is incorporated in the light-sensitive material or the dye-fixing element can also be adopted. The hydrophilic thermal solvent may be incorporated in either the light-sensitive material or the dye fixing element, or may be incorporated in both. The layer to be incorporated may be any of an emulsion layer, an intermediate layer, a protective layer and a dye fixing layer, but it is preferably incorporated in the dye fixing layer and / or its adjacent layer. Examples of hydrophilic thermal solvents include ureas, pyridines, amides, sulfonamides, imides, alcohols, oximes, and other heterocycles.

Further, a high-boiling organic solvent may be contained in the light-sensitive material and / or the dye fixing element in order to promote dye transfer.

As a heating method in the developing and / or transferring step, a heated block or plate is brought into contact, or a hot plate, a hot presser, a heat roller, a halogen lamp heater, an infrared or far infrared lamp heater or the like is contacted. Or passing through a high temperature atmosphere.

Superimposing the light-sensitive element and the dye-fixing element,
For the pressure condition and the method of applying the pressure for the close contact, see Japanese Patent Laid-Open No.
The method described in page 1-147244 (27) can be applied.

Any of a variety of heat developing apparatus can be used in processing the photographic elements of this invention. For example, JP-A-59-7
No. 5247, No. 59-177547, No. 59-181.
No. 353, No. 60-18951, No. 62-259
The device described in No. 44 etc. is preferably used.

[0190]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 A method for preparing the emulsion (1) will be described. Solution I and solution II shown in Table 2 were simultaneously added to a well-stirred aqueous gelatin solution (composition shown in Table 1) over 18 minutes. Five minutes after the addition of the solution I, solutions III and IV shown in Table 2 were simultaneously added over 42 minutes. After washing with water (pH = 4.1) using the precipitating agent (P-1) shown in Chemical formula 19, 22 g of gelatin was added, an aqueous solution of NaCl and NaOH was added, and pH = 6.
1, adjusted to pAg = 7.6 (measured at 40 ° C.) and redispersed. Then triethylthiourea and 4-hydroxy-
Optimal chemical sensitization was performed at 60 ° C. using 6-methyl- (1,3,3a, 7) -tetrazaindene. Optimum is the condition where the sensitivity is maximized in the range where fog does not occur.
The obtained emulsion was a cubic emulsion having an average grain size of 0.26 μm and the yield was 635 g. Further, this emulsion was a monodisperse emulsion having a variation coefficient of 8.5%.

[0192]

[Table 1]

[0193]

[Table 2]

Compound A in Table 1 is shown in Chemical formula 21.

[0195]

[Chemical 21]

Next, a method for preparing a gelatin dispersion of a dye-donor substance will be described.

14.64 g of the magenta dye-donating substance (A) shown in Chemical formula 22 and 0.81 of the reducing agent shown in Chemical formula 26 were used.
0.20 g of the mercapto compound (1) shown in Chemical formula 27
0.38 g of the surfactant (3) shown in Chemical formula 28 and 5.1 g of the high boiling point organic solvent (2) were weighed, and 70 ml of ethyl acetate was added.
Was added and dissolved by heating at about 60 ° C. to obtain a uniform solution.
This solution, 100 g of a 10% solution of lime-processed gelatin and 60 ml of water were mixed by stirring, and then dispersed by a homogenizer at 10,000 rpm for 10 minutes. This dispersion is called a dispersion of a magenta dye-donor substance.

The cyan dye-donating substance (B)
₁ ) 7.3 g, the cyan dye-donor substance (B ₂ ) shown in Chemical formula 24 is 10.6 g, and the reducing agent shown in Chemical formula 26 is 1.0 g.
0.3 g of the mercapto compound (1) shown in Chemical formula 27:
0.38 g of the surfactant (3) shown in Chemical formula 28 and 9.8 g of the high boiling point organic solvent (1) were weighed, 50 ml of ethyl acetate was added, and the mixture was heated and dissolved at about 60 ° C. to obtain a uniform solution. 100 g of this solution and a 10% solution of lime-processed gelatin and 60 parts of water
After stirring and mixing with ml, use a homogenizer for 10 minutes, 1
Dispersed at 0000 rpm. This dispersion is called a cyan dye-donor substance dispersion.

18.75 g of the yellow dye-donor substance (C) shown in Chemical formula 25 and 1.0 g of the reducing agent shown in Chemical formula 26
0.12 g of the mercapto compound (1) shown in Chemical formula 27
, 1.5 g of the surfactant (3) shown in Chemical formula 28, 7.5 g of the high-boiling organic solvent (1) and 2.1 g of the dye (F) shown in Chemical formula 29 were added, and 45 ml of ethyl acetate was added. About 60 ℃
It was dissolved by heating into a uniform solution. This solution, 100 g of a 10% solution of lime-processed gelatin and 60 ml of water were mixed by stirring, and then a homogenizer was used for 10 minutes at 10,000 rpm.
Dispersed in. This dispersion is called a yellow dye-donor substance dispersion.

[0200]

[Chemical formula 22]

[0201]

[Chemical formula 23]

[0202]

[Chemical formula 24]

[0203]

[Chemical 25]

[0204]

[Chemical formula 26]

[0205]

[Chemical 27]

[0206]

[Chemical 28]

[0207]

[Chemical 29]

The high boiling point organic solvents (1) and (2) are as follows. High boiling organic solvent (1): triisononyl phosphate High boiling organic solvent (2): trihexyl phosphate

With these, the heat-developable color photosensitive materials 100 shown in Tables 3 and 4 can be constructed. The sensitizing dye was added when the coating solution was prepared. This sensitizing dye amount is
Optimized for maximum sensitivity.

[0210]

[Table 3]

[0211]

[Table 4]

The surfactants (1), (2) and (4) in Tables 3 and 4 are those represented by Chemical Formula 28,
The mercapto compound (2) is shown in Chemical formula 30. Further, the hardening agent is shown in Chemical formula 31, the stabilizer (1) is shown in Chemical formula 32, and the sensitizing dyes (1), (2), and (3) are shown in Chemical formula 33, Chemical formula 34, and Chemical formula 35, respectively. 1) is shown in Chemical formula 36, respectively. The antifoggant (1) is benzotriazole.

[0213]

[Chemical 30]

[0214]

[Chemical 31]

[0215]

[Chemical 32]

[0216]

[Chemical 33]

[0217]

[Chemical 34]

[0218]

[Chemical 35]

[0219]

[Chemical 36]

Emulsion (1) for the third layer of the light-sensitive material 100
In, triethylthiourea and 4-hydroxy-6-
After the addition of methyl- (1,3,3a, 7) -tetrazaindene, the sensitizing dye (A) shown in Chemical formula 37 was added, and the mixture was sensitized at 70 ° C. for 30 minutes. The sensitizing dye (2) was removed at the time of application to prepare a photosensitive material 101 of a comparative example. The amount of the sensitizing dye (A) added is 5.0 × 10 ⁻⁴ g / m ^{2 in} terms of the coating amount.
Met.

[0221]

[Chemical 37]

Preparation of Light-Sensitive Material of the Invention The light -sensitive material 101 is the same as the light-sensitive material 101 except that the sensitizing dye (A) is changed to the sensitizing dye D-38 shown in Chemical formula 10 in the emulsion of the third layer. Then, the photosensitive material 10
Created 2. The amount of the sensitizing dye added is a coating amount of 7.
It was 0 × 10 ⁻⁴ g / m ² .

In the emulsion of the third layer of the light-sensitive material 102,
Photosensitive Material 1 except that sensitizing dye D-38 of Chemical formula 10 was added and stirred for 30 minutes and then triethylthiourea was added
Photosensitive material 103 was prepared in exactly the same manner as 02.

In the emulsion (1) of the third layer, solutions III and IV
After the completion of addition to the liquid, the temperature was raised to 75 ° C., and 4-hydroxy-6
-Methyl- (1,3,3a, 7) -tetraazaindene was added, and then 0.270 g of sensitizing dye D-
Emulsion (2) was prepared in exactly the same manner as emulsion (1) except that 38 was added and stirred for 30 minutes. A light-sensitive material 104 was prepared in the same manner as the light-sensitive material 101 except that the emulsion (2) was used as the emulsion for the third layer.

In the emulsion of the third layer of the light-sensitive material 102,
A photographic material 105 was prepared in exactly the same manner as the photographic material 102 except that the sensitizing dye D-38 of the chemical formula 10 was changed to the sensitizing dye D-17 of the chemical formula 7. The amount of the sensitizing dye added was 8.50 × 10 ⁻⁴ g / m ² in terms of coating amount.

Photosensitive material 106 was prepared in exactly the same manner as photosensitive material 105 except that sensitizing dye D-17 of Chemical formula 7 was changed to D-21 of Chemical formula 7. The amount of sensitizing dye added is
The coating amount was 8.50 × 10 ⁻⁴ g / m ² .

In the emulsion of the third layer of the light-sensitive material 102,
The sensitizing dye D-38 of Chemical formula 10 is converted to the sensitizing dye D-60 of Chemical formula 17
A light-sensitive material 107 was prepared in the same manner as the light-sensitive material 102 except that the light-sensitive material 107 was changed to. The amount of sensitizing dye added was 8.5 × 10 ⁻⁴ g / m ² in terms of coating amount.

A light-sensitive material 108 was prepared in the same manner as in the light-sensitive material 102 except that the sensitizing dye D-38 of Chemical formula 10 was added at the time of coating. The amount of sensitizing dye added is 7 × 10 ^-3 g / m ^{2 in} terms of coating amount.
Met.

In the emulsion of the third layer of the light-sensitive material 101,
A photographic material 109 of Comparative Example was prepared in exactly the same manner as the photographic material 101 except that the sensitizing dye (A) was changed to the sensitizing dye (B) shown in Chemical Formula 37. The amount of the sensitizing dye added was 8.50 × 10 ⁻⁴ g / m ² in terms of coating amount.

In the emulsion of the third layer of the light-sensitive material 109,
A light-sensitive material 110 was prepared in exactly the same manner as the light-sensitive material 109 except that the sensitizing dye (B) was changed to the sensitizing dye D-5 of Chemical formula 6.

In the emulsion of the third layer of the light-sensitive material 110,
Photosensitive Material 1 in exactly the same manner as Photosensitive Material 110 except that Sensitizing Dye D-5 of Chemical Formula 6 was changed to Sensitizing Dye D-13 of Chemical Formula 7.
11 was created.

In the photosensitive materials 101 to 111,
The amount of sensitizing dye added is 50% to 100% of the saturated adsorption coverage.
The range is.

Next, a method for producing the dye fixing material will be described.

A dye-fixing material was prepared by coating the composition on Table 5 on a polyethylene-laminated paper support.

[0235]

[Table 5]

The compounds used in Table 5 are those represented by Chemical Formula 38 as silicone oils and those represented by Chemical Formula 3 as surfactants.
9 is a mordant shown in Chemical formula 40, and a hardening agent is shown in Chemical formula 41.

[0237]

[Chemical 38]

[0238]

[Chemical Formula 39]

[0239]

[Chemical 40]

[0240]

[Chemical 41]

Polymers * 5, * 7, high boiling point organic solvent * 8, and matting agent * 10 are shown below. Polymer * 5 Vinyl alcohol-sodium acrylate copolymer (75/25 molar ratio) Polymer * 7 Dextran (molecular weight 70,000) High boiling point organic solvent * 8 Reofos 95 (Ajinomoto Co., Inc.)
Matting agent * 10 Benzoguanamine resin (the proportion of particles exceeding 10μ is 18vol%)

Next, evaluation was performed by the following exposure and processing. Using the laser exposure device described in Japanese Patent Application No. 2-129625, exposure was carried out under the conditions shown in Table 6, and 12 cc / m ² of water was supplied to the emulsion surface of the exposed light-sensitive material with a wire bar.
Then, they were superposed so that the dye fixing material and the film surface were in contact with each other. Using a heat drum whose temperature was adjusted so that the water-absorbed film had a temperature of 90 ° C., after heating for 20 seconds, the dye fixing material was peeled off from the photosensitive material to obtain an image on the dye fixing material. Spectral sensitivity was measured by exposing each light-sensitive material to a series of monochrome light for 5 seconds through a wedge and performing the same processing as above.

[0243]

[Table 6]

The transfer density was measured by a self-recording densitometer to determine fog and sensitivity (reciprocal of reversal of exposure amount giving fog + 1.0).

The raw storage stability was evaluated by comparing the photographic performances immediately after coating with those after storage for 3 days at 60 ° C. and 60% RH after coating.

The degree of color separation is the amount of exposure that gives a yellow (Dmax-0.1) density by exposure at 810 nm.
(Dmin + of log E1 and cyan mixed in yellow)
The difference from the exposure dose log E2 that gives the density of 0.1), log E
= Log E1-log E2. The smaller the value (negative value), the better the color separation property.

By the above method, the light-sensitive materials 100 to 11
1, the spectral sensitivity of the cyan color developing layer, sensitivity, fog,
The degree of color separation was measured and summarized in Table 7.

In Table 7, the wavelength (λ max) at which the third layer gives the maximum spectral sensitivity, and the ratio (S ₀ ) of the spectral sensitivity (S ₁ ) to the maximum spectral sensitivity (S ₀ ) for light having a wavelength of 20 nm longer than this λ max. ₁ / S ₀ ). Further, the sensitivity is shown as a relative sensitivity with the sensitivity of the light-sensitive material 100 immediately after coating as 100, which is used as a reference.

[0249]

[Table 7]

From the results shown in Table 7, it is understood that the light-sensitive material of the present invention has high sensitivity, excellent raw storage stability, and excellent color separation property.

In the third layer of the photosensitive material 100,
When the sensitizing dye (2) is added, the photosensitive materials 101, 103,
Each of the light-sensitive materials prepared according to No. 104 was prepared and subjected to the same processing and evaluation, and the same result as that of the light-sensitive material 100 was obtained.

In the third layer of the photosensitive material 101,
Photosensitive materials were prepared by changing the addition timing of the sensitizing dye (A) according to the photosensitive materials 103 and 104, respectively, and subjected to the same processing and evaluation. As a result, the same results as the photosensitive material 101 were obtained.

[0253]

According to the present invention, the color separation property is excellent. Moreover, it has high sensitivity and excellent raw storage stability.

[Procedure amendment]

[Submission date] August 25, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

(1) At least three silver halide emulsion layers having different spectral sensitivities are provided on a support, and when silver ions are reduced to silver under a high temperature condition, this reaction or reverse In a heat-developable color light-sensitive material having at least three layers containing dye-donor compounds that release or generate dyes having correspondingly different hues, at least one of the silver halide emulsion layers comprises thiadicarbocyanine. It contains at least one dye, and the wavelength of maximum spectral sensitivity of this silver halide emulsion layer is 700 nm.
Contains at least one silver halide emulsion spectrally sensitized so that the spectral sensitivity to light having a wavelength of 20 nm longer than the wavelength of the maximum spectral sensitivity is 900 nm or less and 1/3 or less of the maximum spectral sensitivity. A heat-developable color light-sensitive material characterized by being.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

(3) A silver halide emulsion spectrally sensitized so that the spectral sensitivity to light having a wavelength longer by 20 nm than the wavelength of the maximum spectral sensitivity of the silver halide emulsion layer is 1/3 or less of this maximum spectral sensitivity. The above (1) or (2) obtained by chemical sensitization in the presence of at least one of the thiadicarbocyanine dyes represented by the above chemical formulas 3 and 4 and a tetraazaindene compound. The heat-developable color light-sensitive material described in.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

[0051]

[Chemical 8]

[Procedure Amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0062

[Correction method] Change

[Correction content]

Among these, the anionic sensitizing dyes are
Probably used because it is stable in dissolution time of the emulsion coating solution to which the gelatin dispersion containing the dye-donating substance is added, because the spectral sensitivity is likely to be sharpened probably because of good adsorption property, and the oil solubility is low. Be done. Although the reason is not clear, anionic dyes are preferable because they are excellent in raw storage stability as compared with cationic dyes.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0126

[Correction method] Change

[Correction content]

In the present invention, the reducing agent is added in an amount of 0.001 to 20 mol, preferably 0.1 to 20 mol, based on 1 mol of silver.
It is from 01 to 10 mol.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0228

[Correction method] Change

[Correction content]

A light-sensitive material 108 was prepared in the same manner as in the light-sensitive material 102 except that the sensitizing dye D-38 of Chemical formula 10 was added at the time of coating. The amount of sensitizing dye added is 7 × 10 ⁻⁴ g in terms of coating amount.
/ M ² .

Claims (3)

[Claims] 1. When a silver halide emulsion layer having at least three layers having different spectral sensitivities from each other is provided on a support and silver ions are reduced to silver under a high temperature condition, the reaction or the inverse reaction is dealt with. A heat-developable color light-sensitive material having at least three layers containing dye-donor compounds that release or generate dyes having different hues from each other, wherein at least one of the silver halide emulsion layers comprises a thiadicarbocyanine dye. At least one of them is contained, and the wavelength of the maximum spectral sensitivity is 700 nm or more and 900 nm or less, and the spectral sensitivity for light of 20 nm longer wavelength than the wavelength of the maximum spectral sensitivity is 1/3 or less of this maximum spectral sensitivity. 1. A heat-developable color light-sensitive material comprising at least one silver halide emulsion spectrally sensitized with. 2. The heat-developable color photosensitive material according to claim 1, wherein the thiadicarbocyanine dye is represented by Chemical Formula 1 or Chemical Formula 2. [Chemical 1] [Chemical 2] [In Chemical Formula ₁ , Q ₁ and Q ₂ each represent a methylene group, and R ₁ and R ₂ each represent an alkyl group. R ₃ and R ₄ each represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, and R ₃ and R ₄ are not hydrogen atoms at the same time. L ₁ , L ₂ and L ₃ each represent a methine group. A ₁ and A ₂ each represent an atomic group necessary for forming a benzene ring or a naphthalene ring. R ₁ and L ₁ ,
R ₂ and L ₃ may be bonded to each other to form a ring. M ₁ represents a charge balancing counter ion, and m ₁ represents a value required to neutralize the charge. In Chemical formula 2, R ₁ ,
R ₂ , A ₁ , A ₂ , M ₁ and m ₁ have the same meanings as in Chemical formula ₁ , respectively. R ₁ and R ₂ may combine with a methine group to form a ring. R ₅ represents an alkyl group, an aryl group or a heterocyclic group. ] 3. The heat according to claim 1, wherein the silver halide emulsion is obtained by chemical sensitization in the presence of at least one of the thiadicarbocyanine dyes and a tetraazaindene compound. Development color photosensitive material.