JPS61176931A - Formation of image - Google Patents

Abstract

PURPOSE:To prevent uneven transfer of a dye by giving a specified surface characteristic to at least one of the 2 supports of a photosensitive element and a dye fixing element. CONSTITUTION:The surface smoothness characteristic of at least one of the 2 supports of the photosensitive element and the dye fixing element of a heat developable color photosensitive material is controlled so as to have <=10, preferable, 5 points having >=4mum in the max. waviness magnitude when the max. waviness magnitudes of a filtered wave are measured in 100 optionally selected points in the standard length of 2.5mm in the filtered wave waviness curve introduced under the conditions of 0.8mm cutoff value from the section curve obtained in the test performed in accordance with JIS BO610. As the support having such a surface characteristic, coated paper is embodied, and the photosensitive material using this support is good in the adhesion when it is overlaid with the dye fixing material, and uneven transfer can be prevented, and a preferable thickness of the coated paper is a basis weight of 20-200g/m<2>.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process in which an imagewise mobile dye is formed and the transfer of said dye from a friend-sensitive element to a dye-fixing element, and in particular is directed to a process in which a mobile dye is formed in an imagewise manner and is transferred from a photosensitive element to a dye-fixing element. Evenly transferring the mobile dye from a heat-developable color photosensitive material containing a dye-providing substance that reacts with photosensitive silver halide to generate or release a mobile dye by heating to a dye-fixing material in a state free of It also concerns the method.

Prior art and its problems Photography using silver halide has traditionally been the most widely used method because it has superior photographic properties such as sensitivity and gradation control compared to other photographic methods such as electrophotography and diazo photography. It is used in In recent years, it has become possible to easily and quickly obtain images by changing the image forming processing method for photosensitive materials using silver halide from the conventional wet processing using a developing solution to a dry processing using heating, etc. technology is being developed.

Heat-developable photosensitive materials are well known in this technical field, and for information about heat-developable photosensitive materials and their processes, see, for example, Fundamentals of Photographic Engineering (Published by Corona Publishing Co., Ltd., 1999), pages 113-jJJ.
R page, /ri 7 published in January 2017, Eiji Information go page, Nable
tts Handbook of Photo, Ograp
hy and neprography7th E
d, (Van No5trand Reinhol
dCompany), pages 32-32, U.S. Pat.
j co, 20≠ issue, J, 30/, 671, 3゜3y
x, oxo issue, j, 4cj7,07! No. 1, British Patent No. 1. /J/, No. 101, No. 1. /47゜777 issue and Research Disclosure magazine /ri7 wo month issue 2
~/j page (RD-7y.

2).

Regarding how to obtain color images by heat development,
Many proposals have been made. U.S. Patent No. 3! 31,2
No. 16, No. j, No. 741,270, Hiroshi No. 1, Oλl,
A method for forming a color image by combining an oxidized form of a developer with a coupler, etc. and various developing agents used for its removal are described.

In addition, the illegal method of introducing a nitrogen-containing heterocyclic group into a dye, forming silver kIi, and liberating the dye through heat development was published in Research Disclosure magazine 7th issue! ≠～yo 2 pages (R
It is described in D-ibri 47).

Further, regarding the method of forming a positive color image by the heat-sensitive silver dye bleaching method, for example, Research Disclosure magazine, 1976, Hirotsuki issue, pages 3Q to 32 (RD-HA#JJ)
, 1274/λ month issue of the same magazine, pages 1-1J' (RD-tz
27), U.S. Patent No. μ, 23! , No. 217, etc., describe useful methods for bleaching dyes.

Further, regarding the method of forming color images using leuco dyes, for example, US Patent @3.2rj.

It is described in No. 145, No. 02λ, No. 617, etc.

However, in these color image forming methods, during long-term storage of the formed color image, discoloration and coloring of the white background occur due to coexisting silver rhodanide, silver complexes, developing agents, etc. A new color image forming method using heat development that has improved these drawbacks has been published in JP-A-Sho! 7-/7rit≠θ No. 17-/147744, No. 17-IPl#l1, No. 7-207210,
Same J! -41jrlfi3, 1l-7F2!7,
same! r-//6! No. 37, same! r-/≠20 Hiro No. 6, same! Tahiro 17t4c, same! Tar No. 41132, same! Turf 1DIAL, same! ? -171410, same! 11730, etc.

When photosensitive silver halide and/or organic silver salts are reduced to silver by heat development, a mobile dye is produced or released in response to or inversely to this reaction. This is a method in which all dyes are transferred to a dye-fixing element.

These methods give excellent color images without fading or coloring of the white background, but in the areas of the dye-fixing material where the dye should originally be transferred, the transferred dye concentration is extremely low in the diameter of about IOμ to about l. This may cause the inconvenience of scattered irregular circular portions (hereinafter, this development is referred to as transfer unevenness). Such inconveniences do not occur in color image forming methods (for example, color diffusion transfer methods) in which wet processing is performed using conventional developers, and the amount of water present when transferring mobile dyes to dye-fixing materials is This is a problem that occurs specifically in the dye image forming method of the present invention, which is very rare.Additionally, this transfer unevenness is caused by the thickness of the support of the photosensitive material and/or dye fixing material used.
It was found that the extent of this phenomenon depends on the situation, and the thinner the support, the more pronounced the occurrence. This makes it possible to make the support thinner so that a large amount of dye-fixing material after transfer can be stored in a small space, to increase the amount that can be rolled into a roll of light-sensitive material or dye-fixing material, and to make it easier to cut. It also becomes a serious hindrance when trying to reduce product costs.

(2) Purpose of the Invention Accordingly, an object of the present invention is to provide a dye transfer method that does not cause the above-mentioned transfer unevenness.

■Structure of the Invention The purpose of the present invention is to transfer the mobile dye onto a photographic material having a mobile dye distributed in an imagewise manner on the support by overlaying a dye-fixing material having a dye-receiving layer on the support. In the image forming method, at least one of the above-mentioned λ supports has a filtered ridge curve derived from a cross-sectional curve measured in accordance with JIS standard Bog 10 with respect to the smoothness of the support under the condition of a cutoff value O1rm. When the maximum filtering undulation is measured with reference length C and j■,
≠ μ of the maximum swell among the 100 arbitrary measurement points
This is achieved by an image forming method characterized in that the surface has a characteristic in which the number of points having a diameter of m or more is within 70, particularly preferably within 5.

■Specific Disclosure of the Invention Here, the cross-sectional curve is the curve that appears at the cut surface when the surface to be measured is cut by a plane perpendicular to the average surface of the surface. This is a curve obtained by removing surface roughness components with short wavelengths from the curve using a low-pass filter. In addition, the cutoff value is the wavelength corresponding to the frequency at which the gain is 70% when a low-pass filter with an attenuation rate of -/-2dB10ct is used to obtain the filtering ridge curve a, and the cutoff value is the wavelength corresponding to the frequency at which the gain is 70%. is the maximum wave height (Wc
ig) expressed in μm.

The reason why we used the filtered ridge polygon curve using a high cutoff value as a method to represent the unevenness of the surface of the support as described above is because
This is because the above-mentioned transfer unevenness is hardly affected by irregularities shorter than a certain wavelength. Also, the reference length t-2,! This is because the transfer unevenness is not easily affected by surface irregularities with long wavelengths.

This tendency is particularly remarkable when the length of the support is 100 μm or less.

The effects of the present invention are particularly noticeable when paper supports are used. The effect is also remarkable when natural or chemical fibers such as rainbow cloth are used as the support.

A detailed explanation will be given below according to the drawings.

FIG. 1 shows an example of a cross-sectional curve obtained by measuring the surface smoothness of the support using the stylus method according to the JISBO410 standard. From now on, the cutoff value is 0. What is obtained using the rW low-pass filter is the filter waviness curve shown in FIG. FIG. 3 shows how to determine the value of the maximum filtering undulation when the reference length L is used. That is, a portion of length L is arbitrarily extracted from the filtering ridge polygon curve and an average line is obtained. The average line is determined by setting the line so that the sum of squares of deviations from the line to the filtering ridge polycurve is minimized. The filter maximum ridge 6w is the sum of the deviations from the average line of the wave with the maximum wave height and the wave with the minimum wave height.
cM.

In this way, in the present invention, 10
The feature is that when 0 WcMt- is found, the number of WcM having a value above ≠μmDA is 70 or less.

In the present invention, the support having the above-mentioned characteristics includes, for example, coachite burnout. Coachite paint is a paint that is a mixture of mineral pigments such as white clay and adhesives (e.g. casein, starch, latex, polyvinyl alcohol, or a combination thereof) on one side or one side of base paper (e.g., wood-free paper, medium-quality paper, etc.). Refers to paper coated on both sides, and depending on the amount of paint applied, art paper (1m2 coated amount)
(or around), coated paper (approximately 10 f), lightweight coated paper (approximately 1 m2 per bit), and a dryer that gives a mirror finish while the plasticity still remains after coating the paint. Contains cast-coated paper that has been crimped onto paper and dried to provide strong optical properties (for details, refer to the 1912 edition of the Paper and Pulp Technology Handbook, edited and published by the Paper and Pulp Technology Association).
page, page j3j to page j3≦ etc.).

This coated paper has a high surface smoothness even if the base paper is thin (cast coated paper in particular has a very high surface smoothness), so the surface of the coating film such as the photosensitive layer or dye fixing layer coated on top of the coated paper has a high surface smoothness. It also becomes smoother. Therefore, when the photosensitive material and the dye fixing material are superimposed, the layering properties are very high, and the occurrence of uneven transfer can be prevented.

The thickness of the coachite paper used in the present invention ranges from 2Of7m2 to 2009/m in terms of basis weight, especially jOf
7m2~/00t 7m2 A relatively thin (light) material is preferable.

In the present invention, a coating layer for a photosensitive material or a dye fixing layer 1, which will be described later, is applied directly onto the coated wiper.
Alternatively, one or both sides of the coachite paper may be coated or laminated with a polymer such as polyethylene, and if necessary, an undercoat layer may be further provided.
The coating layer for photosensitive materials or the dye fixing layer described above may be applied. If necessary, a white pigment such as titanium dioxide may be mixed into the polymer such as polyethylene to form a white reflective layer. Further, the preferable range of coating or laminating thickness of this polymer such as polyethylene is jμ to jθμ, and the effect of the support of the present invention is particularly noticeable when the film thickness is relatively thin, ≠θμ or less.

Although the present invention is equally effective in preventing transfer unevenness when transferring mobile dyes from one material to another, it particularly provides at least (1) a photosensitive halogenated trowel, (
2) a binder; (3) correspondingly or inversely when the photosensitive halogenated scissors are reduced to silver under high temperature conditions;
imparting an imagewise exposure to a light-sensitive material having a dye-donating substance on its support that produces or releases a mobile dye;
Alternatively, in a dye transfer method, the mobile dye is then heated to form an image, and then the mobile dye is transferred to the dye fixing layer by overlaying the dye fixing material having a dye fixing layer on the support. Demonstrates excellent effects. In this case, as a support for at least one of the light-sensitive material and the dye-fixing material, particularly as a support for the dye-fixing material, a support having the characteristics of the present invention is used.

Further, the effects of the present invention are particularly remarkable in heat-developable photosensitive materials.

Preferred heat-developable photosensitive materials include those described in European Patent No. 76≠2 and European Patent No. 76, that is, at least a photosensitive silver halide, an inder, and a material that releases or emits a mobile dye by heating on a support. It contains a dye-donating substance that forms.

In this case, the dye-donating substance may function as a reducing agent.

Another embodiment of the heat-developable photosensitive material used in the present invention is one having at least one layer of photographic JIt comprising a photosensitive diazo compound, a binder, and a coupling component with the diazo compound on a support.

In the method using a heat-developable diazo copying material, the photosensitive layer contains a photosensitive diazo compound, a coupling component with the diazo compound, and a substance that generates salt at-on heating, that is, a base precursor. When heated, a shivering reaction occurs to form an azo dye.

The method using heat-developable diazo copying material was developed by Akira Mochikai! 0-
//22 issue, 12-10 Taha issue, same j7-Mairi 0
9≠ No. 31-/33033, jJ-/j00/
Hirogo, special public Shoj6-/ri No. 420, same $j-24172
1. Same issue! r/-4c0111! Moon, same! r-1t/
No. 202, No. 1717-21643, etc.

Diazonium salts, coupler compounds with diazo compounds, stabilizers, etc. used in these materials are described in the above-mentioned patent publications.

In the present invention, the light-sensitive material is used together with a dye-fixing element that fixes one dye, if necessary.

The silver I-rodanide that can be used in the light-sensitive material in the present invention is silver chloride, silver iodide, silver iodide, silver chloroiodide, silver chloroiodide, silver iodobromide, or silver chloroiodobromide. But that's fine. Further, these silver 10 decagenides may be spectrally sensitized with methine dyes or the like, and furthermore, an organic metal salt relatively stable to light may be used together with the photosensitive silver halide as an oxidizing agent. You can also do it. For more information on these, please visit Tokugansho! λ13ri7 is described on pages 23-3j of the issue.

In the present invention, a photosensitive material is a compound that, when photosensitive silver halide is reduced to silver under high temperature conditions, generates or releases a mobile dye in response to or inversely to this reaction. That is, it is preferable to contain a dye-donating substance.

Next, the dye-donating substance will be explained.

Examples of dye-donating substances that can be used in the present invention include couplers that can react with a developer. This method using a coupler, in which an oxidized product of the developer produced by an oxidation-reduction reaction between a silver salt and a developer reacts with the coupler to form a dye, is described in numerous documents. Specific examples of developers and couplers include:
For example, The th
theory of thephotographic
process"4'th, Ed.

λri l~331I-page, and 3j≠~3bl is-
Ji, Makoto Kikuchi-author, 1 Photochemistry 1st edition (Kyoritsu Publishing) 21
≠～λ It is described in detail on the Tata page etc.

Further, a dye silver compound in which an organic silver salt and a dye are combined can also be cited as an example of the dye-donating substance. Specific examples of dye silver compounds can be found in Research Disclosure magazine, 1971.
The monthly number, j≠~sr, is written in -ji, (RD-/ArijA), etc.

Furthermore, azo dyes used in heat-developable silver dye bleaching methods can also be cited as examples of dye-donating substances.

Specific examples of azo dyes and bleaching methods can be found in U.S. Pat.
1974 μ month issue, 30-32 (RD-/$4s3)
It is described in etc.

Also, U.S. Pat.

Leuco dyes described in No. 622.417 and the like can also be cited as examples of dye-donating substances.

In addition, examples of other dye-donating substances include, for example, European Patent No. 7 No. 4#2, European Patent No. 7F, 0! Compounds that are useful in the method described in No. TT and have the function of releasing or diffusing a diffusible dye in an imagewise manner can be mentioned. These 2
The effects of the present invention are particularly remarkable in two systems.

Any of the nine various dye-providing substances described above can be used in the light-sensitive material in the present invention.

Specific examples of imaging materials for use in the present invention are described in the patent documents cited above.

In the present invention, the dye-donating substance can be introduced into the layer of the light-sensitive material by a known method such as the method described in US Pat. No. 2.3 Co., 027.

In that case, the following high boiling point organic solvents and low boiling point organic solvents can be used.

For example, phthalic acid alkyl esters (dibutyl phthalate, dioctyl heptathalate, etc.), phosphoric acid esters (diphenyl phosphate, triphenyl phosphate, tricresyl phosphate, dioctyl butyl phosphate), citric acid esters (e.g. acetyl tributyl citrate), benzoic acid esters (octyl benzoate), alkylamides (e.g. diethyl laurylamide), fatty acid esters (e.g. dibutoxyethyl succinate,
high boiling point organic solvents such as dioctyl azelate), trimesic acid esters (e.g. tributyl trimesate),
or an organic solvent with a boiling point of about JO'C to /lO'c, such as lower alkyl acetate such as ethyl acetate, butyl acetate, ethyl propionate, secondary butyl alcohol,
After being dissolved in methyl isobutyl ketone, β-ethoxyethyl acetate, methylseron rubacetate, cyclohexanone, etc., it is dispersed in a hydrophilic colloid. The above-mentioned high boiling point organic solvent and low boiling point organic solvent may be mixed and used.

Tokko Akira again! /-Jri No. 113, Tokukai Sho↓l-! The dispersion method using a polymer described in Tatapi No. 3 can also be used. Also, a variety of surfactants may be used in dispersing the dye-donating substance in the hydrophilic colloid, including those listed as surfactants elsewhere in this specification. You can use it.

In the present invention, it is desirable to include a reducing substance in the light-sensitive material. The reducing substance includes, in addition to those commonly known as reducing agents, the above-mentioned dye-donating substances having reducing properties. Also included are reducing agent precursors that do not themselves have reducing properties but develop reducing properties through the action of nucleophiles and heat during the development process.

Specific examples of reducing agents and reducing agent precursors and documents describing them can be found in Japanese Patent Application Shoj Turco No. 13-71 t! ~ztk
- Described in page 1.

In the present invention, an image formation accelerator can be used in the light-sensitive material. Image formation promoters include promoting redox reactions between silver salt oxidizing agents and reducing agents, promoting reactions such as formation of dyes from dye-donating substances, decomposition of dyes, or release of mobile dyes, and photosensitization. It has functions such as promoting the movement of dye from the material layer to the dye fixed layer, and from a physicochemical function, it has a function of promoting the movement of dye from the material layer to the dye fixing layer. It is classified as a compound that has interactions. However, these substance groups generally have multiple functions and usually have some of the above-mentioned promoting effects.

Details of these are described in Japanese Patent Application Shoyo Turco/3"?7, Nos. t7-71k-page.

In the present invention, various development stoppers can be used in the photosensitive material in order to always obtain a constant image despite fluctuations in processing temperature and processing time during thermal development.

The development stopper referred to here is a compound that neutralizes the base immediately after proper development or reacts with the base to lower the base concentration in the film and stop development, or a compound that inhibits development by interacting with silver and silver salts. It is a compound that

Specifically, Akira Tokgan! 2/J 7 is described in issue No. 7λ-73.

Further, in the present invention, a compound that activates the development and stabilizes the image can be used in the photosensitive material.

For the compounds that are preferably used among them, please contact us!
It is described on pages 73-7 of Turco 1 Jyyr.

In the present invention, the photosensitive material may contain an image toning agent if necessary.

For specific effective examples, see the patent application Shoj Turco 13y7.
It is described in r No. 74C to 7jk-di.

The binders used in the material of the present invention can be contained alone or in combination.

A hydrophilic binder can be used for this binder. Typical hydrophilic binders are transparent or translucent hydrophilic binders, such as tangy grains such as gelatin, gelatin derivatives, and cellulose derivatives, and natural substances such as polysaccharides such as starch and gum arabic. , polyvinylpyrrolidone, acrylamide polymers, and other water-soluble polyvinylated metals. Other synthetic polymeric substances include dispersed vinyl compounds in the form of latexes, which increase the dimensional stability of photographic materials, among others.

In the present invention, the coating amount of the binder is 10 or less per m2, preferably 10 or less, more preferably 7 or less.

The ratio of the high boiling point organic solvent dispersed in the binder together with a hydrophobic compound such as a dye-donating substance and the binder is binder/? less than or equal to solvent/CC, preferably o,
A value of zcc or less, more preferably 0 or jcc or less is appropriate.

The materials of the present invention may contain inorganic or organic hardeners in the photographic emulsion layer and other binder layers.

For example, chromium salts (chromium alum, chromium acetate, etc.),
Aldehydes (formaldehyde, glyoxal, geltaraldehyde, etc.), N-methylol compounds (dimethylol urea, methylol dimethylhydantoin, etc.)%
Dioxane derivatives (λ.

3-dihydroxydioxane, etc.), activated vinylated metals (
/, j, j-) lyacryloyl-hexahydro-8-)
9 Azine, /, 3-vinylsulfonyl-coprobanol, /, Corbis (hinyl sulfonylacetamide)
Ethane, etc.), active halogen compounds (J, Hiro-dichloro-t-hydroxy-ts-)') azine, etc.), mucohalogen acids (mucochloric acid, mucophenoxychloroic acid, etc.), etc. can be used alone or in combination. can.

In the present invention, when using a dye donor 'Jit which releases an imagewise mobile dye, a dye transfer aid can be used to transfer the dye from the photosensitive layer to the dye fixing layer.

For a specific example of this, please refer to Tokugansho! ? -λ1327j No. 7
1 to 72 on the same page.

When the light-sensitive material used in the present invention contains a colored dye-donating substance, an anti-irradiation or anti-halation substance i, 6, or various dyes may be further contained in the light-sensitive material. Although it is not necessary to do so, in order to improve the sharpness of the image, filter dyes and absorbers described in some of the literatures exemplified in Sho Tatar 2/J 7 and No. 7P to It is possible to contain a sexual substance or the like.

In the present invention, the photosensitive material may contain various additives used as a heat-developable photosensitive material, layers below the photosensitive layer, such as an antistatic layer, a conductive layer, a protective layer, an intermediate layer, an AH layer, It can contain a release layer and the like. Various additives include Research Dictionary Magazine Vol. 1,
/ 70. / ? 71st layer year 116/702 of month
Examples of the additives described in No. 2 include plasticizers, sharpness-improving dyes, AH dyes, sensitizing dyes, matting agents, surfactants, fluorescent whitening agents, and antifading agents.

The photographic material of the present invention preferably contains a light-sensitive material that forms or releases a dye upon heat development and, if necessary, a dye-fixing material that fixes one dye. In particular, in systems that form images by diffusion transfer of dyes, a photosensitive element and a dye fixing element are essential, and in a typical form, the photosensitive element and dye fixing element are separately coated on a single support. It is broadly divided into two types: one in which it is coated on the same support, and one in which it is coated on the same support.

There are two types of forms in which a photosensitive element and a dye-fixing element are formed on separate supports: one is a peelable type and the other is a non-peelable 4J type. In the case of both peel-off types, after image exposure or heat development, the coated surface of the photosensitive element and the coated surface of the dye-fixing element are overlapped, and after the transfer image is formed, the photosensitive element is immediately peeled off from the dye-fixing element. Depending on whether the final image is of a reflection type or a transmission type, the support of the dye fixing element can be selected as an opaque support or a transparent support.

Further, a white reflective layer may be coated if necessary.

In the case of the latter type that does not require peeling, it is necessary to interpose a white reflective layer between the photosensitive layer in the photosensitive element and the dye fixing layer in the dye fixing element. It may be coated on any of the fixing elements. The support of the dye fixing element needs to be a transparent support.

A typical configuration in which the photosensitive element and the dye-fixing element are coated on the same support is a configuration in which there is no need to peel off the photosensitive element from the image-receiving element after the transfer image is formed. In this case, a photosensitive layer, a dye fixing layer and a white reflective layer are provided on a transparent or opaque support. Preferred embodiments include, for example, transparent or opaque support/photosensitive layer/white reflective layer/dye fixing layer/transparent support/dye fixing layer/white reflective layer/photosensitive layer.

Another typical form in which the light-sensitive element and the dye-fixing element are coated on the same support includes 1, for example, JP-A-Sho! A-671, Canadian Patent No. 474! , No. 012, U.S. Patent No. 3,7
As described in No. 30,7II, there is a form in which part or all of the photosensitive element is peeled off from the dye-fixing element;
Examples include those having a release layer coated at an appropriate position.

The photosensitive element or the dye-fixing element includes an electrically conductive heating element I as a heating means for thermal development or diffusion transfer of the dye.
- may be in the form.

In order to obtain a wide range of colors in the chromaticity diagram using the three primary colors yellow, magenta and cyan, the photosensitive element used in the present invention has at least three layers each! A must have a photosensitive silver halide emulsion layer in the vector region.

Typical combinations of at least three light-sensitive silver halide emulsion layers sensitive to different spectral regions include a combination of a blue-sensitive emulsion layer, a green-sensitive emulsion layer and a red-sensitive emulsion layer, a green-sensitive emulsion layer, and a red-sensitive emulsion layer. A combination of a sensitive emulsion layer and an infrared sensitive emulsion layer, a combination of a blue sensitive emulsion layer, a green sensitive emulsion layer and an infrared sensitive emulsion layer, a blue sensitive emulsion layer, a red sensitive emulsion layer and an infrared sensitive emulsion. There are combinations of layers, etc.

In addition, an infrared light-sensitive emulsion layer is 700 nm or more, especially 700 nm or more.
≠ 2 emulsions that are sensitive to light of onm or higher.

In the present invention, the photosensitive material 114 may have an emulsion layer sensitive to the same spectral region divided into two or more layers depending on the sensitivity of the emulsion, if necessary.

Each of the above emulsion layers and/or the non-photosensitive hydrophilic colloid layer adjacent to each emulsion layer is a dye-donor that releases or forms a yellow hydrophilic dye, and a dye-donor that releases or forms a magenta hydrophilic dye. It is necessary to contain any seven types of dye-providing substances that release or form cyan hydrophilic dyes. In other words, for each emulsion layer and/or non-photosensitive hydrophilic colloid layer adjacent to each emulsion layer.

It is necessary to contain a dye-donating substance that releases or forms hydrophilic dyes of different hues.

If desired, λ or more dye-providing substances having the same hue may be mixed and used. If the dye-providing substance is initially colored, it is advantageous to contain the dye-providing substance in a separate layer from this emulsion layer. In addition to the above-mentioned layers, the photosensitive material used in the present invention may be provided with auxiliary layers such as a protective layer, an intermediate layer, an antistatic layer, an anti-curl layer, a release layer, and a matting agent layer, if necessary.

In particular, the protective layer (PC) usually contains an organic or inorganic matting agent to prevent adhesion.

Friend, this protective layer may contain mordants, UV absorbers, etc. Each of the protective layer and the intermediate layer may be composed of two or more layers.

Further, the intermediate layer may contain a reducing agent, a UV absorber, and a white pigment such as TiO2 to prevent color mixing. A white pigment may be added not only to the intermediate layer but also to the emulsion layer for the purpose of increasing sensitivity.

In order to impart each of the above-mentioned color sensitivities to a silver halide emulsion, each silver halide emulsion may be dye-sensitized using a known sensitizing dye to obtain the desired spectral sensitivity.

In the present invention, the dye-fixing material has at least one layer containing a mordant, and when the dye-fixing layer is located on the surface, a protective layer can be further provided if necessary.

Further, a sufficient amount of a dye transfer aid may be included as required, and a water absorbing layer or a dye transfer aid containing layer may be provided to control the dye transfer aid. These 1 may be adjacent to the dye fixing layer or may be applied via an intermediate layer.

The dye fixing layer may be composed of two or more layers using mordants having different mordant powers, if necessary.

In the present invention, the dye fixing material may be provided with auxiliary layers such as a release layer, a matting agent layer, and an anti-curl layer, if necessary, in addition to the above-mentioned layers.

Seven or more of the above layers include a base and/or Fi base precursor to promote dye transfer, a hydrophilic heat solvent, an anti-fade agent to prevent color mixing of dyes, a UV absorber, and a dimensional stabilizer. A dispersed vinyl compound, a fluorescent brightener, etc. may be included to increase the properties.

The binder in the above layer is preferably hydrophilic, and transparent or translucent hydrophilic colloids are typical. For example, proteins such as gelatin, gelatin derivatives, polyvinyl alcohol, cellulose derivatives, natural substances such as starch, polysaccharides such as gum arabic, water-soluble polyvinyl compounds such as dextrin, pullulan, polyvinyl alcohol, polyvinylpyrrolidone, and acrylamide polymers. Synthetic polymeric substances etc. are used. Among these books, especially gelatin.

Polyvinyl alcohol is effective.

In addition to the above, the dye fixing material may have a reflective layer containing a white pigment such as titanium oxide, a neutralization layer, a neutralization timing layer, etc. depending on the purpose. These layers may be coated not only in the dye-fixing element but also in the photosensitive element. The configurations of the above-mentioned reflective layer, neutralization layer, and neutralization timing layer are described in US Patent No. 2, for example. rit'3. tot No. J, jjJ, II
No. W, No. j, jj, 2. I co No. 1, I co No. J, air,
a4c≠ issue, Canadian patent number λr,! ! It is written in the number etc.

Furthermore, it is advantageous for the dye fixing material of the present invention to contain a transfer aid as described below. The transfer aid may be included in the dye fixing layer, or may be included in a separate layer.

In the present invention, when electrical heating is employed as the developing means, a transparent or opaque heating element can be provided on the support, and in this case, the resistance heating element can be manufactured using conventionally known techniques.

As a resistance heating element, there are two methods: a method using a thin film of an inorganic material exhibiting semiconductivity, and a method using a thin film of an organic material in which conductive fine particles are dispersed in a binder.

Materials that can be used in the former method include silicon carbide, molybdenum silicide, lanthanum chromate, barium titanate ceramics used as PTC thermistors, tin oxide, and zinc oxide, and transparent or opaque thin films are made using known methods. be able to. In the latter method, conductive particles such as metal particles, carbon black, and graphite are dispersed in rubber, synthetic polymers, and gelatin to create a resistor with desired temperature characteristics. These resistors may be in direct contact with the photosensitive element or may be separated by a support, intermediate layer, or the like.

In the present invention, the image-receiving layer includes a dye fixing layer used in heat-developable color light-sensitive materials, and can be arbitrarily selected from commonly used mordants, among which polymer mordants are particularly preferred. Here, the polymer mordant includes a polymer containing a tertiary amino group, a polymer having a nitrogen-containing heterocyclic moiety, a polymer containing these cationic groups, and the like.

Regarding this specific example, please refer to the patent application Shoj Turco 13ri 7-layer No.
It is described in the literature exemplified on the 1st page.

In the present invention, as well as the heat-developable photosensitive layer, coating solutions for the protective layer, intermediate layer, undercoat layer, backing layer, and other layers are prepared for each layer using the dipping method, air knife method, curtain coating method, or U.S. Patent No. 3 and 4? A photosensitive material can be prepared by sequentially coating a support onto a support using various coating methods such as hot coating and e-coating described in the reference specification, and drying.

Furthermore, two or more layers can be applied simultaneously if desired by the methods described in US Pat. No. 741.75'/ and British Patent No. 137,091.

As a light source for image exposure for recording an image on a heat-developable photosensitive material, radiation including visible light can be used. In general, various light sources such as tungsten lamps, halogen lamps such as mercury lamps and iodine lamps, xenon lamps, laser light sources, CRT light sources, fluorescent tubes, and light emitting diodes (LEDs) are used in addition to the light sources used for normal color printing. be able to.

In the present invention, the heating temperature in the heat treatment step is approximately ro
It can be developed at 0c to about 2ro 0c, but especially about 71
00C to about /Ir00C are useful; within this range,
/4LO0c or more is preferred, and /yo'C or more is particularly preferred. The heat treatment process includes a heat development process and a transfer process, and the heating temperature in the transfer process ranges from the temperature in the heat development process to room temperature. Temperatures up to about 1°C lower are more preferred. As a heating means in the development and/or transfer process, a simple hot plate, iron, hot roller, heating element using carbon, titanium white, etc. can be used.

A dye transfer aid (for example, water) is added between the photosensitive layer of a heat-developable photosensitive material and the dye fixing layer of a dye fixing material to promote image transfer. It is also possible to apply a dye transfer aid to one or both of the layers before superimposing them.

The heating means in the transfer process includes heating that passes between hot plates or in contact with the hot plates (for example, Japanese Patent Application Laid-Open No. 12433-1
No.), heating by contacting a heated drum or heated roller while rotating (V/8, equity 111B≠3-1
07? / issue), heating by passing through hot air (for example, JP-A No. 3-32737), heating by passing through an inert liquid kept at a constant temperature, and other methods such as heating by passing through an inert liquid kept at a constant temperature, and other methods such as heating along a heat source with a roller, belt, or guide member. Heating by heating (for example, Tokko Sho≠≠−2jμ) can be used.

In addition, a layer of 411L material such as graphite, carbon black, metal, etc. is applied to the dye fixing material,
This conductive layer may be heated directly by passing an electric current through it.

The pressure when overlapping the heat-developable photosensitive material and the dye-fixing material and bringing them into close contact varies depending on the embodiment and the materials used.
0. /-/ 00W4/cm2 preferably /-j O
Kg/crn2 is appropriate (for example, with special application!r-
(Listed in Jij Otori No. 1).

The method for applying pressure to the photothermographic material and the dye-fixing material is to pass it between a pair of rollers.

Various methods can be used, such as a method of pressing using a plate with good smoothness. Further, the roller and plate used when applying pressure can be heated in a range from room temperature to warm temperature in a heat development process.

■　Example Example 1 The method for preparing benzo) 177 sol silver emulsion will be described.

21g of gelatin and 13.2g of benzotriazole in J water
Dissolves in OO1d. The solution is kept at ≠o'C and stirred. A solution of 17 g of silver nitrate dissolved in 100 yd of water was added to this solution over 2 minutes.

The benzotriazole silver emulsion is pH-adjusted, precipitated, and excess salt is removed. Thereafter, the DH was adjusted to 6.30 to obtain a benzotriazole silver emulsion with a yield of 00 g.

This article describes how to make silver halide emulsions for the 5th and 1st layers.

A well-stirred gelatin aqueous solution (water ioo.

Contains 20g of gelatin and 3g of sodium chloride in d, 7
An aqueous solution 4ooyJ containing sodium chloride and potassium bromide and an aqueous silver nitrate solution (a solution containing ooyVc silver nitrate o, r tamol) were simultaneously added at equal flow rates over a period of ≠O minutes. did. In this way, a monodisperse cubic silver chlorobromide emulsion (bromine jO mol) having an average grain size of O8≠θμm was prepared.

After washing with water and desalting, sodium thiosulfate vcum 189 and 20 mg of hydroxy-6-methyl/, J, Ja, 7-chitrazaindene were added, and chemical sensitization was carried out to'c. The yield of emulsion was 600 g.

Next, we will explain how to prepare a silver halide emulsion for the third layer.

A well-stirred gelatin aqueous solution (containing 20 g of gelatin and 3 g of sodium chloride in 1000 d of water, at 71'C
An aqueous solution containing sodium chloride and potassium bromide (K kept warm) and a silver nitrate aqueous solution (water ≦00p)
Silver nitrate 0. (2 moles dissolved) were simultaneously added at equal flow rates over 4 AO minutes. In this way, the average particle size is 0.3! A μm monodisperse stereoscopic silver chlorobromide emulsion (bromine to molten) was prepared vI4.

After washing with water and desalting, sodium thiosulfate! Da and≠-Hydroxy-6-methyl-/,! , 3a,7-chitrasainthene-20W9 was added to perform chemical sensitization to 0c. The yield of emulsion was 600 g.

Next, how to make a gelatin dispersion of a dye-donating substance will be described.

The yellow dye-donating substance (A) was used as a surfactant, and succinic acid-λ-ethylhexyA/ester sulfonic acid was used as a surfactant. Weigh Jg, triinnonyl phosphate/Og, add ethyl acetate JOyLl, and make approximately ≦
Dissolve 0'CIC by heating to make a homogeneous solution. After stirring and mixing this solution and 100 g of IQ% solution of lime-treated gelatin, 100 OQr was added using a homogenizer for 10 minutes.
Disperse at p. This dispersion is called a yellow dye-providing substance dispersion.

A dispersion of a magenta dye-providing substance was prepared using the same method as described above, except that the magenta dye-providing substance (B) was used and 7 g of tricresyl phosphate was used as a high boiling point solvent.

A cyan dye-providing substance (C) was used in the same manner as the yellow dye dispersion.

Using these materials, a color photosensitive material having a multilayer structure as shown in the following table was prepared.

Dye-donating substance (A) (B) (C) i-/) (D-λ) (D-j) [t Next, a method for producing a dye-fixing material having a dye-fixing layer will be described.

First, gelatin hardener (H-/)0.7 to 1, (l(-
2) 0. Coj P % water/AOynl and IO lime treated gelatin 100f were mixed uniformly. This mixed solution was applied to each of the paper supports (a), (b), and (C) shown in the table below, which were laminated with polyethylene in which titanium oxide was dispersed.
It was applied uniformly to a wet film thickness of μ and then dried.

Next, a polymer having the following structure was dissolved in 2 oml of water, mixed uniformly with 100f of lime-treated gelatin, and this mixed solution was uniformly applied onto the above coating material to a wet film thickness of rzμ. Dried, dye fixing material (1
), (It), and (III) were obtained.

A tungsten light bulb is used in the multilayered color photosensitive material described above, and a GlR, IR three-color separation filter with continuously changing density (G is zoo~4°Onm, R is 600~
700nm band, 4 filters, IR is 700n
(constructed using a filter that transmits more than m),
Exposure was performed for 7 seconds at 00 Lux.

After that, on a heat block heated to 14L00C,
Heated uniformly for 0 seconds.

Next, water was supplied to the film surface side of the dye-fixing material at an amount of 2/pitd per wind, and then the heat-treated photosensitive coatings were superimposed on the fixing material so that the film surfaces were in contact with each other.

After heating on a heat block at RO 0C for 6 seconds, the dye fixing material is peeled off from the light-sensitive material, and the dye is deposited on the fixing material.
Yellow, magenta, and cyan color images were obtained corresponding to the three color separation filters of G, R, and IR, respectively.

The maximum density (Dmax) of each color is measured using a Macbeth reflection type densitometer (
RD-Yo/Yori), and the degree of generation of transfer marks 2 of each dye-fixing material was visually evaluated.

The results are shown in Table 2.

From the table above, it can be seen that when coated paper or gearst coated paper of the present invention is used, the occurrence of transfer unevenness is significantly reduced even when the basis weight is small (thin).In particular, when cast coated paper is used, the occurrence of transfer unevenness is significantly reduced. It can be seen that it can be almost completely eliminated.

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional curve of the support. FIG. 2 is the filtering waviness curve of FIG. 1. FIG. 3 shows how to find the filtering maximum ridge value. a is the filter waviness curve and b is the average line. L is the reference length. Patent applicant: Fuji Photo Film Co., Ltd. Figure 1, Figure 2, Figure 3

Claims (1)

[Claims] In an image forming method in which a dye-fixing material having a dye-receiving layer is superimposed on a support to transfer the mobile dye to a photographic material having a mobile dye distributed in an imagewise manner on the support, the above-mentioned two supports are used. At least one support of the body has a reference length of 2.5 mm for a filtering waviness curve derived from a cross-sectional curve measured according to JIS standard BO610 with a cutoff value of 0.8 mm for the smoothness of the support.
An image forming method characterized by having a surface characteristic such that when the maximum filtered waviness is measured as mm, there are 10 or less points where the maximum waviness is 4 μm or more among 100 arbitrary measurement points.