JPH0656478B2 - Photographic support - Google Patents

Description

The present invention relates to a photographic support that gives excellent images. More specifically, the present invention relates to a photographic support in which the brightness and saturation of an image image, the gradation reproducibility of dark areas, the sharpness, etc. are remarkably improved.

[Prior Art] Conventionally, as a photographic support, for example, a transparent plastic film such as TAC or PET, or as a reflective material, paper, synthetic paper, or a plastic film containing a white pigment, a glass plate, or a metal. A plate (for example, an aluminum plate whose surface is anodized) is known. In particular, in order to improve the whiteness of the support, fine powder of a metal oxide or an inorganic compound (for example, titanium oxide, barium sulfate, magnesium oxide, etc.) is mixed or contained as a sizing agent on the surface of the support. However, increasing the whiteness of the support usually improves the white reproduction of the photograph, but degrades the image sharpness. For this reason, various attempts have been made to incorporate an anti-irradiation dye in the photosensitive layer containing silver halide provided on the support or to provide an anti-halation layer.

The so-called Dakereotype photography method has been known since the early 19th century. In this method, a well-polished silver plate is sprinkled with iodine gas and chemically reacted to form an AgI layer,
After image exposure, it is developed with mercury gas to make a photographic image. However, instead of using a well-balanced silver plate as a support, various chemical treatments are performed, so that the silver plate surface is contaminated and the initial mirror surface is not retained, and the silver / mercury image directly masks the silver surface. Therefore, it was impossible to obtain the brilliance and the sharpness of the image.

Also, the image obtained from a layered coating of a conventional emulsion on an aluminum support having good light reflection and a metallic glossy surface was slightly brighter than that of the baryta paper. In addition, when a silver halide emulsifier was contained in a microcapsule and applied in a single layer, bright and transparent grains were visible (see, for example, Japanese Patent Publication No. 49).
-33783 No.). Moreover, the light was reflected and it was difficult to see, and the slight scratches on the surface were not good.

It is also known to provide a vapor-deposited metal layer of aluminum or chromium to prevent static (for example,
British Patent No. 1340403, JP-B-59-41573, JP-B-59-1042
0, etc.). However, there is no description which is not related to the present invention and suggests improvement of image reproduction.

[Problems to be solved by the invention]

A first object of the present invention is to improve the brightness and saturation of an image, and in particular to expand the angle at which the image can be observed well. A second object is to improve the image sharpness to the extent that conventional techniques cannot reach. Other purposes will be apparent from the description of the specification.

[Means for solving problems]

The above-mentioned various objects of the present invention include a photograph in which a support having a surface having a second-type diffuse reflectance and a directivity or a solid thin film layer having a surface having a second-type diffuse reflectance and a directivity is provided on a substrate. Achieved by the support.

The support of the present invention will be described below.

Generally, the reflection characteristics of the object surface are roughly classified into specular reflection and diffuse reflection. Furthermore, diffuse reflection can be divided into first-type diffuse reflectance and second-type diffuse reflectance. Specular reflection is the reflection on a smooth surface and is the reflection that follows the normal rule of specular reflection. On the other hand, diffuse reflection means paper, painted surface,
Reflection from wood and walls, which is a reflection of parallel incident rays scattered in all directions as well as in the direction of specular reflection.

The type II diffuse reflectance generally means reflection on a rough surface having a boundary of a small inclined surface such as frosted glass or a polished metal surface. In the present invention, the second-class diffuse reflectivity refers to reflectivity due to a set of smooth surfaces that are specularly reflective and have small boundaries with small irregularities. In this case, the diffusely reflected light can be considered as a set of specularly reflected light by a small reflecting surface.
This is the reason why the type 2 diffuse reflectance is called "small specular reflectance". For example, it is defined by Chapter 18, Section 1 of Color Science Handbook (Japanese Color Society, 5th edition of 1985, published by The University of Tokyo Press).

The first type diffuse reflectance and the second type diffuse reflectance can be distinguished by the difference in reflectance. In the present invention, the second type diffuse reflectance refers to the case where the reflectance R is 0.5 or more. Therefore, the surface of the diffuse reflection of the second kind in the present invention is 0.5.
Above, more preferably, it has a reflectance of 0.7 to 1.0. The reflectance R for light irradiation in the vertical direction on a smooth surface made of the same material can be obtained by a gonio-reflectometer. Further, the type II diffuse reflective support can also be evaluated by the total reflectance by a spectrophotometer having an integrating sphere. The first-class diffuse reflectivity is such a reflectivity that, when a light-transmissive solid is a fine powder, incident light becomes diffused light due to total reflection and partial surface reflection.

Specular reflection and diffuse reflection can be distinguished by the difference in spectral reflectance. Here, the spectral reflectance is measured with monochromatic light of 550 nm which is incident at an incident angle of 7 degrees from the normal direction of the test sample, and the specular reflectance is 10 with the specular reflection direction of the incident light as the center.
The specular reflection component is removed by providing a trap at a degree, and the components diffusely reflected within the 90-degree angle of view from the normal line are integrated by an integrating sphere to obtain the percentage as to the incident light. The diffuse reflectance of the second kind in the present invention has the spectral reflectance (measured with monochromatic light of 550 nm) of 5% or more. Therefore, the surface of diffuse reflection of the second kind of the present invention is one having a spectral reflectance (measured with monochromatic light of 550 nm) of 5% or more, preferably 10%, and more preferably 20% or more. The spectral reflectance can be obtained using, for example, Hitachi Color Analyzer Model 307.

Thus, from the reflectance R of the material used for forming the surface with respect to light irradiation in the vertical direction and the value of the spectral reflectance when a trap of a spectrophotometer such as a Hitachi color analyzer is provided, the second aspect of the present invention can be obtained. Specular diffuse reflection and specular reflection and first
Species diffuse reflection can be distinguished.

Solids, preferably metals, which provide a diffusely reflective surface of the second kind include F.I. F. Benford et al. J. Opt. Soc. Amer,
32, pages 174-184 (1942), such as metals such as silver, aluminum, gold, copper, chrome nickel, platinum, alloys thereof such as aluminum / magnesium alloys, aluminum / copper, aluminum / antimony, Cinti Yu is used.

The surface of the solid thin film layer, preferably the metal thin film layer, which provides the second type diffuse reflectance is obtained as follows. First, the surface of a metal plate having specular reflectivity is patterned at the time of rolling, or mechanically, for example, by a brush having an appropriate strength or by spraying fine particles of an abrasive such as pumice with a jet flow to grain and electrolyze. Etching method by the method can be obtained. The metal thin film layer having the reflective property of the present invention can be laminated or laminated on a substrate to form a support.
Secondly, vacuum deposition method, sputtering method, ion plating method, electrodeposition method, electroless plating method, etc. are known as methods for providing a metal thin film layer, and one or two layers are formed on a predetermined substrate by using this method. As described above, a thin film layer can be provided. In the case of specular reflection, a type II diffuse reflection surface can be formed by the method described above.

The surface irregularities can be determined by embedding and fixing the sample in resin, cutting an ultrathin section, and observing the cross section using an electron microscope. It is possible to directly measure with submicron accuracy using a cross-sectional shape measuring device using electron beam irradiation. The number of irregularities can be measured as a frequency of surface roughness, preferably the average frequency is 0.1 to 2000 pieces / mm, more preferably 1 to 1000.
Ke / mm.

When the support of the present invention is used, the observation viewing angle of an image is enlarged,
It is very easy to see by expanding the light source from a point to a plane, that is, by appropriately expanding the directivity of the reflected light to the observation surface,
Further, the brightness of the highlight of the image, the saturation of the image, and the reproducibility of the gradation of the dark part are significantly improved. Also, surprisingly, the image sharpness was dramatically improved.

As the substrate of the support according to the present invention, those conventionally used can be used as they are without any problem. For example, plastic, film or paper, RC-paper, synthetic paper, metal plate or the like is used. Paper or RC-paper is preferable,
It can be obtained by laminating the pre-textured aluminum foil of the present invention by using low density polyethylene together with the polyethylene layer of RC-paper. The thickness of the support according to the present invention is preferably 50 μ to 300 μ depending on the application.

The support according to the present invention can be provided with a silver halide emulsion layer via an undercoat layer. The undercoat layer is obtained by using a thermoplastic resin such as polyethylene or polypropylene, or an ionomer resin containing an epoxy adhesive. On top of this, a gelatin or gelatin silver halide emulsifier layer can be provided with or without corona discharge treatment.

In some cases, the present invention comprises only an upper layer such as an undercoat layer containing fine particles having a diffuse reflection of the first kind of less than 1 g / m ² for example, and a latex having a diffuse reflection of the first kind and a fine force of a high boiling point organic solvent in the upper layer. It is also possible to include various dispersed particles.

Further, fine powder of titanium oxide or barium sulfate is mixed with the substrate, and fine holes are provided in the metal thin film layer according to the present invention on the surface thereof, and a part of the diffuse reflection of the first kind is mixed with the diffuse reflection of the second kind. You can also let it. As a result, there is little deterioration in sharpness, and the viewing angle can be expanded.

In the present invention, the support having the surface of the second kind diffuse reflection of the present invention can be obtained by patterning the metal film during rolling as described above. Here, as the metal, the above-mentioned silver, aluminum,
Mention may be made of gold, copper, chromium nickel, platinum, and alloys thereof.

The support of the present invention can be widely used as a photographic reflective support. If necessary, a silver halide emulsion layer for black-and-white printing paper may be provided on the support through a subbing layer, and a protective layer may be provided thereon. Similarly, a photosensitive material for color photographic paper can be prepared by providing two or more photosensitive silver halide emulsion layers each having a different spectral sensitivity for ordinary color photographic paper and containing different color couplers. Further, a color reversal light-sensitive material, a direct positive type color photographic paper, or a direct positive type color copy material using an optical fog method can be prepared. A red-sensitive, green-sensitive, and blue-sensitive silver halide emulsion layer containing silver halide grains having different spectral sensitivities and a dye used in the silver die bleach (SDB) method is provided on this support. If provided, a SDB type print photosensitive material can also be manufactured.

It can also be used as a material for forming a color image by providing a mordant layer on the support according to the present invention and diffusing and transferring the color-development type dye. It can also be used as a material for forming a silver diffusion transfer type silver image by providing a physical development nucleus in the undercoat layer on the support of the present invention.

Also, the photographic support of the present invention is the same as US Pat.
No. 60-133449, 59-21844.
It can also be applied to the photothermographic material and / or dye fixing material (image receiving material) described in JP-A No. 3 and Japanese Patent Application No. 60-79709.

Next, examples will be shown to more specifically describe the present invention. However, it is not limited to this.

Example 1 Metallic aluminum was roughly rolled, and further, a central rolling roller was rolled up and down between upper and lower two adjacent rolling rollers. Then, two annealed metallic aluminum layers were rolled and rolled. An aluminum foil having a thickness of 10 μm was obtained. Surprisingly, the contacting surfaces had a diffuse reflectance of the second kind. Low density polyethylene was extrusion coated onto a white photographic base paper and laminated with metallic aluminum. Next, the other surface of the substrate was subjected to corona discharge treatment, and then high density polyethylene was extrusion coated to form a polyethylene resin layer having a thickness of 30 μm. A thin layer of ionomer resin was provided on the aluminum surface to obtain a sample 1 of the support.

On the other hand, according to Example 1 of Japanese Patent Application No. 60-52788, the thickness is 100 μm.
The polyethylene phthalate film of No. 3 was placed in a vacuum vapor deposition apparatus R, and a vapor deposition film having a thickness of 1000 Å was formed on the surface of the substrate of aluminum at a vacuum degree of 10 ^-5 torr. A low-density polyethylene was coated on this to form a polyethylene resin layer having a thickness of 30 μm to obtain a comparative sample a.

Sample 1, which is the support of the present invention, had less reflection of light than Comparative sample a, had a metallic shine, and had a wide viewing angle. The thickness of Samples 1 and a was about 120 μm.

Example 2 After using the support sample 1 obtained in Example 1 and subjecting the surface provided with the aluminum foil to corona discharge treatment, gelatin and a curing agent 1-oxy-3,5-dichloro-S-triazine sodium were used. Is subjected to undercoating treatment, and a silver chlorobromide emulsion layer (halogen composition AgCl67
% Average particle diameter 0.4 μ) was further provided and a protective layer was further provided. The silver coating amount was 2.1 g / m ² . After imagewise exposure, development was carried out using the developer D-72 (diluted 1: 2), and the fixing solution was washed with water. On the other hand, resin coated paper usually used for photographic paper (a white base paper mixed with titanium oxide on one side for whitening to have diffuse reflection of the first kind, white on the other side, polyethylene on the other side coated with extrusion coating) A photographic printing paper was obtained in the same manner using Sample b. After the same image exposure as this, the image was obtained by washing with developing and fixing water. The image obtained from support sample 1 had more highlight brilliance, richer gradation in the dark areas, and sharper than that of support comparative sample b. Surprisingly, the maximum density and the tightness of the sheer dough were not inferior.

Example 3 Using the support sample 1 and comparative samples a and b, Japanese Patent Application No. 61-
A color reversal photographic paper was obtained according to Example 1 of 99122.

After image exposure, normal reversal development, that is, first development, washing with water,
Reverse exposure, color development, washing with water, bleach-fixing, washing with water,
I got an image.

The sample 1 of the present invention was significantly improved in lighting and sharpness as compared with the comparative sample b, and compared with the comparative sample a, the light source was not reflected and the observation viewing angle was widened. In particular, the gradation of dark areas, which is said to be a defect of reversal color photographic paper, became rich, and the macro became soft overall as a whole, but due to the improvement of the sharpness, the micro gradation is hard and an excellent image with a texture is produced. Was obtained.

Example 4 After performing corona discharge treatment on Support Sample 1, an undercoat layer was formed using gelatin and the hardener 1-oxy-3,5-dichloro-S-triazine sodium.

Preparation of Color Emulsion Coating Solution Core / outer shell type internal emulsion B was obtained as follows.

Emulsion B 30 g of gelatin was added to a mixed solution 1 having a concentration of 0.5 mol of KBr, 0.2 mol of NaCl and 0.0015 mol of KI and dissolved at 700C, and 700 cc of a solution of 1 mol of silver nitrate was mixed at 60 ° C. Was added over 20 minutes and physical ripening was performed for 20 minutes. After washing with water to remove the water-soluble halide, 20 g of gelatin was added and the total amount was 1200 cc with water.
Was prepared. A silver halide emulsion having an average grain size of 0.4 μm was obtained. To 300 cc of this emulsion, 500 cc of a 1 mol / silver nitrate aqueous solution and 500 cc of a 2 mol / sodium chloride aqueous solution were simultaneously added at 60 ° C. to precipitate silver chloride shell, followed by washing with water. A silver halide emulsion B having an average grain size of 0.7 μm was obtained.

Preparation of coating solution for the first layer: 10 g of cyan coupler (a), 2.3 g of color image stabilizer (b), 10 ml of ethyl acetate and 4 parts of solvent (c)
ml was added and dissolved, and this solution was emulsified and dispersed in 90 ml of a 10% gelatin aqueous solution containing 5 ml of 10% sodium dodecylbenzenesulfonate. On the other hand, to the above-mentioned silver halide emulsion B (containing 70 g / kg of Ag), the red-sensitive dye shown below was added at 2.0 × 10 ⁻⁴ mol per mol of silver halide to prepare 90 g of a red-sensitive emulsion. The emulsified dispersion and emulsion were mixed and dissolved, and the concentration was adjusted with gelatin so that the composition shown in Table 3 was obtained. Further, a nucleating agent (compound 2) was added in an amount of 3 per mol of Ag.
× 10 ⁻⁴ and 4.7 × 10 ⁻⁴ per Ag / mol of the nucleation accelerator were added to prepare a coating liquid for the first layer.

The coating solutions for the second to seventh layers were also prepared in the same manner as the coating solution for the first layer. 1-oxy- as a gelatin hardening agent for each layer
3,5-Dichloro-S-triazine sodium salt was used.

The following were used as the spectral sensitizer for each emulsion.

Sensitizing dye for blue-sensitive emulsion layer Sensitizing dye for green emulsion Sensitizing dye for red-sensitive emulsion layer Antiaging dye for green sensitive emulsion layer Irradiation prevention dye for red-sensitive emulsion layer The structural formulas of the compounds used in this example such as couplers are as follows.

(a) Cyan coupler (b) Color image stabilizer 1: 1: 3 mixture (molar ratio) (c) Solvent (d) Color mixing inhibitor (e) Magenta coupler (f) 1: 1.5 mixture (weight ratio) (g) 1: 2: 2 mixture (weight ratio) (h) UV absorber 1: 5: 3 mixture (molar ratio) of (i) Color mixture inhibitor (j) Solvent (iso C ₉ H ₁₉ O ₃ P = 0 (k) Yellow coupler (l) Color image stabilizer (m) Solvent (iso C ₉ H ₁₉ O ₃ P = 0 Nucleation accelerator. 10 Treatment process. A The stabilizing bath was replenished into the stabilizing bath, and the overflow liquid of the stabilizing bath was introduced into the stabilizing bath, and the overflow liquid of the stabilizing bath was introduced into the stabilizing bath.

[Color developer]

The pH was adjusted with potassium hydroxide or hydrochloric acid.

[Bleach-fixing solution] Mother liquor Aluminum thiosulfate 110 g Sodium bisulfite 10 g Diethylenetriamine iron (III) pentaacetate 56 g Ammonium monohydrate Ethylenediaminetetraacetic acid disodium 5 g Dihydrate Add water 1000 ml pH 6.5 pH is ammonia water or hydrochloric acid It was adjusted.

[Stabilizer]

The pH is adjusted with potassium hydroxide or hydrochloric acid. Further, a comparative photosensitive material sample was similarly obtained using the comparative support sample b.

The three types of samples were imagewise exposed and passed through the development processing A as follows.

The images obtained in the present invention had a high yield and were extremely excellent in sharpness, as compared with those obtained in the comparative light-sensitive material sample. Especially, the gradation reproducibility in the dark area was improved.

Example 5 Support sample 2 was obtained by appropriately imparting patterning to the cylinder in the rolling process in Example 1. Further, the support sample 3 was obtained by giving less patterning of the cylinder.

In addition, a color reversal printing paper using the support sample 1 was obtained according to Example 3. Sample 4 was obtained through undeveloped elemental development processing.

Next, using a Hitachi Color Analyzer Model 307, a trap of about 10 ° from the light source was provided in the integrating sphere to remove the light, and a sulfuric acid barrier white plate was used as a standard, and the spectral reflection of the support samples 1 to 4 and a was performed. The rate was measured. This is shown in FIG.

Also, the spectral reflectance at 550 nm light is shown.

Example 6 Surface irregularities of Support Samples 1, 2, and 3 (all without an undercoat layer) were measured with an accuracy of 0.1 μm using a cross-sectional shape measuring device (Eluonics). The results are shown in FIGS. 2, 3, and 4, respectively. The number of irregularities (frequency) was 100 ± 50 / mm for the support sample, 180 ± 50 / mm for the support sample b, and 600 ± 100 / mm for the support sample 3.

Example 7 A photothermographic material having a layer structure as shown in Table 4 was produced. Emulsions (I), (VI) and (VII), organic silver salts (1),
Details of the manufacturing method (2) will be described later. Then, a dye fixing material was prepared by applying a mordant or the like on the support according to the present invention, and a test was conducted to form a color image on the fixing material by heat development.

The method for preparing the emulsion for the fifth layer will be described.

Emulsion (I) Well stirred gelatin aqueous solution (20g gelatin, 3g sodium chloride and compound in 800ml water) (Which was kept at 65 ° C by dissolving and) and the following solutions I and II
The solution was added over 70 minutes. Sensitizing dye (A) at the same time when solution I and solution II are added A dye solution prepared by dissolving 0.24 g in a solution of (120 cc of methanol + 120 cc of water) was added, and the solution was added over 60 minutes.

Immediately after the addition of solutions I and II, 2 g of KBr was dissolved in 20 ml of water and added, and the mixture was allowed to stand for 10 minutes.

Wash with water, add 25 g of dehydrochlorinated gelatin and 100 ml of water and adjust the pH.
6.4 and pAg were adjusted to 7.8.

The resulting emulsion was a cubic dispersed emulsion with a grain size of about 0.5μ.

This emulsion was kept at 60 ° C. and triethylthiourea 1.3 mg;
Optimal chemical sensitization was carried out by simultaneously adding 100 mg of 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene. The yield was 650 g.

The method for preparing the emulsion for the third layer will be described.

Emulsion (VI) Well stirred gelatin aqueous solution (20 ml of gelatin, 2 g of sodium chloride and compound in 800 ml of water) Were dissolved and kept at 55 ° C.), and the following solutions I and II were added over 60 minutes.

Sensitizing dye (B) at the same time when solution I and solution II are added A dye solution prepared by dissolving 0.16 g in 80 ml of methanol was added for 40 minutes.

After adding solution I and solution II, the mixture was left for 10 minutes, then the temperature was lowered, washed with water and desalted, and then 25 g of gelatin and 1 part of water were added.
00 ml was added to adjust pH to 6.5 and pAg to 7.8.

After adjusting the pH and pAg, triethylthiourea and 4-hydroxy-6-methyl-1,3,3a-, 7-tetrazaindene were added and optimum chemical sensitization was performed at 60 ° C.

The obtained emulsion was a cubic monodisperse emulsion having a grain size of about 0.35μ and the yield was 650 g.

The method for preparing the emulsion for the first layer will be described.

Emulsion (VII) Well stirred gelatin aqueous solution (20g gelatin and 4g sodium chloride in 1000ml water) 600 m of an aqueous solution containing 49 g of potassium bromide and 10.5 g of sodium chloride)
1 and an aqueous solution of silver nitrate (0.59 mol of silver nitrate dissolved in 600 ml of water) were simultaneously added at the same flow rate over 50 minutes. After washing with water and desalting, 25 g of gelatin and 200 ml of water were added to adjust the pH to 6.4, and an optimum chemical increase was performed using triethylthiourea and 4-hydroxy-6-methyl-1,1,3a-7-tetrazaindene. Sensation was given to obtain 700 g of a cubic monodisperse emulsion (I) having an average particle size of 0.4 μm.

How to make an organic silver salt is described.

Organic Silver Salt (1) A method for preparing a benzotriazole silver emulsion will be described.

Gelatin 28g and benzotriazole 13.2g in water 300
Dissolved in ml. The solution was kept at 40 ° C. and stirred. To this solution, add 2 g of a solution of 17 g of silver nitrate in 100 ml of water.
Added in minutes.

The pH of this benzotriazole silver emulsion was adjusted and allowed to settle to remove excess salt. Then adjust the pH to 6.30,
A yield of 400 g of benzotriazole silver emulsion was obtained.

Organic silver salt (2) 20 g of gelatin and 5.9 of 4-acetylaminophenylpropiolic acid were dissolved in 1000 ml of 0.1 sodium hydroxide aqueous solution and 200 ml of ethanol.

The solution was kept at 40 ° C. and stirred.

A solution prepared by dissolving 4.5 g of silver nitrate in 200 ml of water was added to this solution over 5 minutes.

The pH of this dispersion was adjusted and allowed to settle to remove excess salt. Thereafter, the pH was adjusted to 6.3 to obtain a yield of 300 g of a dispersion of the organic silver salt (2).

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

12 g of yellow dye-donor substance (Y-1), (Y-
2) 3g, high boiling organic solvent (1) 7.5g, reducing agent (1)
0.3 g and 0.3 g of mercapto compound (1) were added and dissolved in 45 ml of ethyl acetate, and 100 g of 10% gelatin solution was added.
And a 2.5% aqueous solution of sodium dodecylbenzene sulfonate 6
After stirring and mixing with 0 ml, the mixture was dispersed at 10,000 rpm for 10 minutes with a homogenizer. This dispersion is called a yellow dye-donor substance dispersion.

15 g of magenta dye-donating substance (M), high-boiling organic solvent (1) 7.5 g, reducing agent (1) 0.3 g and mercapto compound (1) 0.15 g were added and dissolved in 25 ml of ethyl acetate,
100 g of a 10% gelatin solution and 60 ml of a 2.5% aqueous solution of sodium dodecylbenzenesulfonate were mixed by stirring, and then dispersed with a homogenizer at 10,000 rpm for 10 minutes. This dispersion is called a dispersion of a magenta dye-donor substance.

15 g of cyan dye-donating substance (C), 7.5 g of high boiling organic solvent (1), 0.4 g of reducing agent (1), and 0.6 g of mercapto compound (1) were added and dissolved in 40 ml of ethyl acetate,
100 g of a 10% gelatin solution and 60 ml of a 2.5% aqueous solution of sodium dodecylbenzenesulfonate were mixed by stirring, and then dispersed with a homogenizer at 10,000 rpm for 10 minutes. This dispersion is referred to as a dispersion of a cyan dye-donor substance.

Next, how to make the dye fixing material will be described.

A dye-fixing material was prepared by coating on the photographic support of the present invention having the same gelatin subbing layer as used in Examples in the constitution shown in the following table.

The multilayer color light-sensitive material was exposed for 1/10 ^-4 seconds using a xenon flash tube. At that time, it was exposed through a three-color separation filter of G, R, and IR whose densities were continuously changed.

12 cc / m ² of water was supplied to the emulsion surface of the exposed light-sensitive material with a wire bar, and thereafter the layers were superposed so that the dye-fixing material was in contact with the film surface. When the dye-fixing material is peeled from the photosensitive material after heating for 20 seconds using a heat roller whose temperature has been adjusted to 90 ° C, the three color decompositions of G, R, and IR on the dye-fixing material. Images of yellow, magenta and cyan were obtained corresponding to the filters.

By using the support of the present invention, a transfer dye image having a richer gradation and sharper than that obtained by using a conventional paper support laminated on both sides with polyethylene was obtained.

Example 8 The diffuse reflectance of the support of the present invention was measured. The support of the present invention (Sample 1) prepared in Example 1 and the comparative sample b (normal resin coated paper) used in Example 2 were used as samples for measurement. The light source A was irradiated onto the sample at an angle of 5 ° from the normal, and the angular distribution of the scattering holes was measured using a Goniometer (GP-1R type) manufactured by Murakami Color Research Laboratory. Results are shown in FIG. In the figure, the relative reflectance (logarithmic scale) is shown in the region above the straight line between -90 ° and 90 °, and the relative transmittance is shown in the region below the straight line between -90 ° and 90 °. The solid line a and the broken line b are the reflectance of the sample 1, the solid line c and the broken line d are the reflectance of the comparative sample b, and the solid line e and the broken line f are the transmittance of the comparative sample b. The reflectance and transmittance shown by solid lines are measured by irradiating the sample with light at an angle of 5 ° from the normal in the length direction of the support sample when the sample was prepared. The reflectance and transmittance shown by broken lines are measured by irradiating the sample with light at an angle of 5 ° from the normal in the vertical direction when the sample was prepared.

As shown in FIG. 5, the support (Sample 1) of the present invention is within a viewing angle range (± 40 °) which is important for observing a color photograph, as compared with the conventional support (Comparative Sample b). , With stronger reflectivity. Further, with respect to the support of the present invention, no light transmitted through the sample was observed and the anisotropy was relatively small.

[Brief description of drawings]

FIG. 1 shows a spectral reflectance curve. 2 to 4 show the cross-sectional shape measurement results. FIG. 5 shows the angular distribution dependence of diffusely reflected light of Samples 1 and b.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keisuke Shiba, 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture, Fuji Photo Film Co., Ltd. (56) Reference JP 54-106303 (JP, A) JP 60-72794 ( JP, A) JP 54-92804 (JP, A) JP 62-21147 (JP, A) New edition color chemistry handbook, University of Tokyo press conference, (Published February 25, 1980), No. 340 ~ 343, 626 ~ 627

Claims (8)

[Claims] 1. A photographic support having a surface of the second kind having diffuse reflectance and directivity and having a reflectance R of 0.5 or more. 2. A photographic support comprising a substrate and a solid thin film layer having a surface having a diffuse reflectance and a directivity of type 2 and a reflectance R of 0.5 or more. 3. A photographic support according to claim (2), wherein the solid is a metal. 4. The metal is aluminum, silver, gold, nickel,
The photographic support according to claim (3), which is magnesium or an alloy thereof. 5. The photographic support according to any one of claims (2) to (4), wherein a thermoplastic resin layer or an adhesive layer is provided between the solid thin film layer and the substrate. body. 6. The second type diffuse reflective surface of the solid thin film layer comprises:
The photographic support according to any one of claims (2) to (5), wherein the solid thin film layer is provided with irregularities of about 0.1 to 2000 points / mm on the mirror surface. 7. The photographic support according to any one of claims (2) to (6), wherein the substrate is paper. 8. The photographic support according to claim 7, wherein the substrate is provided with a thermoplastic resin layer or a water resistant resin layer on the surface opposite to the surface provided with the solid thin film layer.