CN1331005C - Silver halide type color photographic paper - Google Patents

Abstract

The present invention relates to a silver halide photographic material, particularly to a silver halide colourized photographic paper which comprises a supporter and emulsion layers. The material is characterized in that in a blue sensitive emulsion layer existing on the supporter, fine particles whose average particle diameter is 0.55 mum are adopted; in a green sensitive emulsion layer existing on the supporter, the composition of pyrazolo triazole magenta coupler whose structure is showed in formula 3, a discolouration preventing agent whose structure is showed in formula 4 and an ultraviolet radiation absorbing agent whose structure is showed in formula 5 is adopted; in formula 3, R1 refers to a hydrogen atom, a methyl radical or a butyl, R2 refers to a C1 to C5 alkyl, and R3 refers to a C10 to C20 long-chain radical comprising an aryl group or a five-membered or six-membered heterocycle containing sulfur and nitrogen; in formula 4, R4 refers to a hydroxy, a phenoxy group or a six-membered ring containing a sulfonic group and a nitrogen atom, and R5 refers to a hydrogen atom, a C10 to C20 alkyl, a hydroxy or an aryl group; in formula 5, R6, R7 and R8 refer to phenolic groups. The silver halide colourized photographic paper has the advantages of favorable colour rendition performance, light stability of images and liquid medicine quality of fatigue resistance.

Description

A kind of silver halide color photographic paper

technical field

The invention relates to a silver halide photographic material, in particular to a silver halide color photographic paper.

Background technique

Nowadays, in the silver halide photographic system, a technology called high particle sensitivity is tended to be adopted, that is, while ensuring a considerable sensitivity, the size of the silver halide emulsion grains is reduced as much as possible to make the picture clearer and clearer. Delicate, however, after the silver halide grain size is reduced, one of the biggest problems is how to improve its sensitivity. As described in US Pat. Reduce the recombination opportunities of photogenerated electrons and holes, thereby increasing the sensitivity.

In the silver halide photographic material, the primary aromatic amine developer is used for color development after exposure, and the formed developer oxide is coupled with the coupler to form a dye to obtain an image, in which the magenta image is composed of pyrazolone, pyrazolobenzimidazole Formed with pyrazolozole and other color couplers, among which pyrazolone type is the most widely used magenta color coupler in the early stage; compared with pyrazolone type main magenta The dye formed by the coupler has a better spectral absorption curve, no miscellaneous absorption in the blue-sensing region of 430nm to 450nm, and the absorption peak on the long-wave side is steeper, so it has better color reproduction, and has high color development rate and formaldehyde resistance. Strong and other advantages, so since the 1990s, most foreign color photographic paper products use pyrazoloazole-type magenta couplers.

Chinese patent CN1258021 discloses a photographic material using a novel pyrazolo[5,1-c]-1,2,4-triazole-type magenta coupler, which has good color reproduction and light stability .

Chinese patent CN1023217 discloses a method using 1H-pyrazolo[1,5-b]-1,2,4-triazole fuchsin coupler or pyrazolo[5,1-c]-1,2,4 - A photographic material of a triazole magenta coupler, which has good color reproducibility and exhibits excellent photographic properties in terms of sensitivity, gradation and color density.

Chinese patent CN1258860 discloses a photographic material in which a cyclic azole coupler dye and a stabilizer composition comprising the following compounds are combined in the emulsion layer: (1) The general formula of the first compound molecule is: (R ₄ ) _m (C ₆ H _5-m )NHSO ₂ R ₃ ; (2) The molecular formula of the second compound is: (R ₆ ) _n (C ₆ H _4-n )(OR ₅ ) ₂ . The use of these stabilizer combinations above in combination with cyclic azole couplers can provide a highly stable dye image.

Chinese patent CN1260513 discloses a photographic material in which a pyrazolotriazole coupler is used in the emulsion layer. The coupler has a known pyrazolotriazole configuration, but the substituents introduced are different, and the obtained Coupler properties change. The novel coupler compound of the invention reacts with the oxidized color developing agent during processing, and exhibits relatively good coupler efficiency.

Today, practically used pyrazolotriazole couplers in photographic materials are basically of the following configuration:

Formula 1

Formula 2

In Formula 1 and Formula 2, X is a substituent that falls off when reacting with the developer oxide, such as H or Cl; R ₉ is a C ₁ -C ₅ alkyl group; R ₁₀ can adopt various types of substituents, different Substituents have a great influence on photographic performance. U.S. Patent US4942117, Japanese Patents JP4-204645, JP10-161284, and JP6-250357 all disclose the use of substituents as pyrazoloazole couplers of aryl groups. Heat resistance and moisture resistance are greatly improved, and the absorption peak is narrower; the pyrazoloazole magenta coupler used in US Patent US4822730 and US5234805 contains sulfonamide; The azole coupler contains carboxyl groups, the coupler has a higher color density, and its dyestuff also has strong stability, and is not too sensitive to the pH value of the developer; Azoloazole coupler α-C has -N-substituting alkyl group, which red shifts the absorption of the dye by 5-12 nanometers.

When the image formed by the coupling of the coupler and the developer is exposed to light, heat or moisture, the dye molecules are easily intensified and in an unstable state, and become a colorless compound after oxidation or hydrolysis, resulting in fading of the image. This is more pronounced for dyes formed from magenta couplers, especially pyrazoloazole magenta couplers. The measures to prevent or eliminate this light fading mainly include: adopting more stable color formers (introducing anti-fading groups into color formers), using anti-fading agents, ultraviolet absorbers, etc.

Japanese patents JP5-241288 _and JP11-109577 disclose color couplers containing six- _membered nitrogen-containing heterocyclic structures such as substituted piperazines; Azolozazole magenta couplers, these couplers improve the lightfastness of dyes.

The most effective measure to eliminate light fading is the combination of couplers with anti-fading agents and UV absorbers. The anti-fading agent can capture the singlet oxygen or free radical anion of oxygen generated under light irradiation, prevent the dye from being oxidized, and play an anti-fading effect; the ultraviolet absorber can prevent the oxidative decomposition reaction of the dye under ultraviolet irradiation. The anti-fading agents used mainly include phenols, chromans, bispirinedenes, aromatic ethers, phosphoramides, etc. UV absorbers mainly include benzotriazole type, acrolein type, s-triazine type and so on. U.S. Patent US5236819, US5082766, German Patent DE4307194 disclose the use of specific stabilizers combined with pyrazoloazole couplers to improve the stability of dyes, but the effect is not satisfactory; U.S. Patent US5561037 discloses the comprehensive use of aromatic sulfonamides And cyclic sulfonamide stabilizer as the anti-fading stabilizer of pyrazoloazole coupler, play better effect, but this kind of aromatic sulfonamide is difficult to prepare, and the cost is higher; Chinese patent CN1258860 discloses the use of stabilizer combination Phenylflavinamide and aryl ether have achieved better anti-fading effects.

Contents of the invention

The object of the present invention is to provide a silver halide color photographic paper, which has good color rendition, image light stability and resistance to fatigue liquid.

Technical scheme of the present invention is:

A silver halide color photographic paper, comprising a support and an emulsion layer, characterized in that:

(1) The blue-sensing layer emulsion on the support adopts fine particles with an average particle diameter of 0.55 μm;

(2) The green-sensing layer on the support adopts the combination of pyrazolotriazole magenta coupler (formula 3) and anti-fading agent (formula 4) and ultraviolet absorber (formula 5) of the following structure:

Formula 3

Formula 4

Formula 5

In Formula 3, R ₁ is a hydrogen atom, methyl or butyl; R ₂ is a C ₁ -C ₅ alkyl group; R ₃ is a C ₁₀ containing an aryl group or a five-membered or six-membered heterocyclic ring containing sulfur and nitrogen. ~ _C20 long chain group;

In formula 4, R ₄ is hydroxyl, phenoxy or a six-membered ring containing sulfonic acid group and nitrogen atom; R ₅ is hydrogen atom, C ₁₀ ~ C ₂₀ alkyl, hydroxyl or aryl;

In Formula 5, R ₆ , R ₇ , and R ₈ are phenolic groups.

A preferred solution, wherein said emulsion is silver chlorobromide emulsion, wherein the chlorine content is 98% or higher.

A preferred solution, wherein the emulsion is monodisperse cubic particles.

A preferred solution, wherein the weight ratio of the anti-fading agent to the pyrazolotriazole magenta coupler is 0.5-1.5:1.

A preferred solution, wherein the amount of the ultraviolet absorber in the silver halide color photographic paper is 5.0×10 ^-4 mol/m ² to 1.0×10 ^-3 mol/m ² .

The silver halide color photographic paper comprises a support and an emulsion layer. In the silver halide color photographic paper provided by the invention, the blue-sensing layer emulsion on the support adopts fine particles with an average particle diameter of 0.55 μm; the green-sensing layer on the support adopts the following Combination of pyrazolotriazole magenta coupler (formula 3) and anti-fading agent (formula 4) and ultraviolet absorber (formula 5) of structure:

Formula 3

Formula 4

Formula 5

In formula 3: R ₁ is a hydrogen atom, methyl or butyl; R ₂ is a C ₁ ~ C ₅ alkyl group; R ₃ is a C ₁₀ ~ _C20 long chain group;

In formula 4: R ₄ is hydroxyl, phenoxy or a six-membered ring containing sulfonic acid group and nitrogen atom; R ₅ is hydrogen atom, C ₁₀ ~ C ₂₀ alkyl, hydroxyl or aryl;

In Formula 5: R ₆ , R ₇ , and R ₈ are phenolic groups.

Specific examples of pyrazolotriazole magenta couplers, anti-fading agents and UV absorbers suitable for the present invention are respectively:

The pyrazolotriazole magenta coupler in the present invention has the advantages of the pyrazoloazole coupler and has excellent color reducibility. As mentioned above, this type of coupler has poor stability under light, so the pyrazolotriazole coupler in the present invention needs to be used in combination with an anti-fading agent and an ultraviolet absorber. The anti-fading agent and ultraviolet absorber used in the present invention are used in combination with the pyrazolotriazole coupler in the present invention to obtain a highly stable dye image.

The pyrazolotriazole coupler, anti-fading agent and ultraviolet absorber in the present invention are known compounds, and their preparation methods are disclosed in US Pat.

The pyrazolotriazole color coupler, anti-fading agent and ultraviolet absorber in the present invention are dispersed in the gelatin aqueous solution by a method known in the art. As the dispersant, sodium triisopropylsulfonate, sodium dodecylsulfate, sodium dodecylbenzenesulfonate or sodium diisooctylsulfonate can be used. The high boiling point solvent should be alkyl phthalate, phosphate, citrate or benzoate, preferably dibutyl phthalate and tributyl phthalate in combination. The amount of dispersant and high boiling point solvent is the conventional amount.

In the present invention, the coating amount of the pyrazolotriazole coupler on the support is generally 4.0×10 ^-4 mol/m ² to 6.0×10 ^-4 mol/m ² .

In the present invention, the ratio of the anti-fading agent to the pyrazolotriazole coupler is in the range of 0.5-1.5:1.0 (weight ratio).

The dosage range of the ultraviolet absorber in the present invention is 5.0×10 ^-4 ~ 1.0×10 ^-3 mol/m ² .

The emulsion used in the present invention is a monodisperse AgBrCl cubic grain emulsion, and the chlorine content is 98% or higher, preferably more than 99%. Its preparation method is a double injection emulsification method known in the art, as described in Research Disclosure, vol.531, 1988, Item 40928 and Research Disclosure, vol.365, 1994, Item36544 and James, The Theory of Photographic Process.

The emulsion used in the present invention can be chemically sensitized and spectrally sensitized by known sensitization methods in the art. Emulsions can be chemically sensitized with sulfur and noble metal gold, as described in Research Disclosure, vol.531, 1988, Item40928 and Research Disclosure, vol.365, 1994, Item36544; spectral sensitization uses polymethine carbocyanine dyes, such as Research Disclosure, vol.365, 1994, described in Item36544.

During the preparation of the emulsion, transition metal ions of group VIII in the periodic table can be doped to improve the photographic properties of the emulsion. As shallow electron trap dopants, metal ions such as Ir ³⁺ , Ru ³⁺ , Rh ³⁺ , Os ³⁺ can be used, such as BH Carroll, Photographic Science and Engineering, vol.24, No.6, 265-267 (1980 ) and Research Disclosure, vol.531, 1988, Item 40928 and Research Disclosure, vol.365, 1994, Item 36544.

During emulsion preparation, stabilizers, antifoggants and other additives should be added to the emulsion layer to improve the stability of photographic materials, as described in Research Disclosure, vol.365, 1994, Item 36544, Section VII.

In the present invention, the average grain size of the blue-sensing layer emulsion particles is a fine particle of 0.55 μm, which can be obtained by one of the following methods: reducing the emulsification temperature, increasing the feeding rate in the nucleation stage, using a crystal growth regulator, etc., preferably increasing the emulsification temperature. feed rate.

After the emulsion particle size is reduced, it will lead to the reduction of emulsion sensitivity. It can be compensated by doping noble metal ions such as Ru ²⁺ , Pt ²⁺ or other methods. The present invention adopts a simple and effective method. After reducing the particle size of the emulsion, the surface area of the particles is greatly increased, which can absorb more effective and more spectral sensitizing dyes. In the present invention, sensitizing dyes are respectively added in the physical maturity and chemical maturity stages of preparing the emulsion, and the chemical sensitization and spectrum sensitization are carried out crosswise, thereby preparing the emulsion with high particle sensitivity.

In the present invention, the used spectral sensitizing dye of the blue-sensing layer emulsion has the following structure:

Formula 6

In Formula 6: R ₁₁ and R ₁₂ are C ₁ -C ₅ alkanesulfonic acid groups; R ₁₃ is a hydrogen atom, a halogen atom or an aryl group; X- is Cl ^- , Br ^- , or CH ₃ (C ₆ H ₄ ) SO ₃ ^- .

The silver halide color photographic paper of the present invention has the structure and components shown in Research Disclosure, 1995, Item 37038. Wherein, the photosensitive layer of the yellow layer uses the microemulsion of the present invention; the photosensitive layer of the yellow layer uses the combination of the pyrazoloazole coupler and the anti-fading agent of the present invention.

The silver halide color photographic papers of the present invention can be imaged by exposure to various techniques, as described in Research Disclosure, vol. 365, 1994, Item 36544.

Silver halide color photographic papers comprising the compositions of the present invention can be processed using any known processing method, such as Research Disclosure, vol. 365, 1994, Item 36544 and The Theory of Photographic Process (T.H. James, 4th edition, Macmillan, New York , 1977) described in.

The silver halide color photographic paper of the present invention has good color reproduction, image light stability and fatigue drug solution resistance.

Detailed ways

The present invention will be described in more detail below in conjunction with specific examples, but the present invention is not limited thereto.

Comparative example 1

Preparation of Sensitive Blue Emulsion A:

In a reaction vessel with high-speed stirring, add 5% gelatin aqueous solution, adjust the pH value to 6.0, adjust the pCl value to 1.3, and keep the temperature at 65°C, add 5ml of 1,8-dihydroxy-3,6 -Dithiooctane (20% alcohol solution), in the resulting aqueous solution, use a metering pump to add the aqueous solution M-1 containing 0.90mol silver nitrate and the aqueous solution M-1 containing 0.90mol chlorinated Aqueous sodium solution N-1 and stirred vigorously for 5 minutes. Then add the aqueous solution M-2 comprising 0.10mol silver nitrate and the aqueous solution N-2 comprising 0.10mol halide (halogen ratio: Cl/Br=95/5), and vigorously stir for 10 minutes to obtain a particle size of 0.80 μm, A silver halide emulsion with a silver chloride content of 99.5%. Then at 30°C, the above-mentioned mixture is washed by sedimentation and water to achieve the purpose of desalination, and chemical sensitization and spectral sensitization are carried out according to conventional methods. The spectral sensitization dye adopts the blue-sensitive dye in the present invention. is 0.30mol.

Comparative example 2

Preparation of color coupler oil emulsion A:

1.0 Azolone-type product coupler is dissolved in the mixture consisting of dibutyl phthalate, tributyl phthalate and ethyl acetate in a ratio of 1:3:10 (volume ratio), and the mixture is heated to A solution was formed at 70°C, and 18 ml of 10% gelatin aqueous solution and 0.75 ml of 10% sodium dodecylbenzenesulfonate were added under high-speed stirring. Stop stirring after 45 minutes, add deionized water to the dispersed mixture to a total amount of 20 g, set aside. The structure of the oxazolone type coupler is as follows:

Comparative example 3

Preparation of UV absorber oil emulsion A:

1.0g benzotriazole type ultraviolet absorber is dissolved in the mixture that is formed by dibutyl phthalate, tributyl phthalate and ethyl acetate in the ratio of 2: 1: 9 (volume ratio), The mixture was heated to 70° C. to form a solution, and 8 ml of 10% gelatin aqueous solution and 0.4 ml of 10% sodium lauryl sulfate were added under high-speed stirring. After 45 minutes, the stirring was stopped, and the dispersed mixture was added to deionized water until the total amount was 20 g. ,spare. The structure of benzotriazole type ultraviolet absorber is as follows:

Example 1

Preparation of Sensitive Blue Emulsion B:

In a reaction vessel with high-speed stirring, add 5% gelatin aqueous solution, adjust the pH value to 5.50, adjust the pCl value to 1.4, and keep the temperature at 65°C, add 5ml of 1,8-dihydroxy-3,6 - Dithiooctane (20% solution in alcohol). Add aqueous solution M-1 containing 0.90mol silver nitrate and aqueous solution N-1 containing 0.90mol sodium chloride with a metering pump at an initial velocity of 0.012mol/min (in terms of Ag), and stir vigorously for 5 minutes. Then add the aqueous solution M-2 comprising 0.10mol silver nitrate and the aqueous solution N-2 comprising 0.10mol halide (halogen ratio: Cl/Br=95/5), and vigorously stir for 5 minutes to obtain a particle size of 0.55 μm, Monodisperse cubic silver halide emulsion with 99.5% silver chloride content. Then add 0.35mol of blue-sensitizing layer spectral sensitization dye, and stir vigorously for 5 minutes, then settle and wash the above mixture at 30°C to achieve the purpose of desalination, and then carry out chemical sensitization and secondary spectrum sensitization, the amount of dye is 0.10mol. The specific structure of the spectral sensitizing dye is as follows:

Example 2

Preparation of color coupler oil emulsion B:

1.0g pyrazolotriazole coupler and 1.0g anti-fading agent are dissolved in the ratio of 1:3:10 (volume ratio) by dibutyl phthalate, tributyl phthalate and ethyl acetate In the formed mixture, the mixture was heated to 70° C. to form a solution, and 18 ml of 10% aqueous gelatin solution and 0.75 ml of 10% sodium dodecylbenzenesulfonate were added under high-speed stirring. Stop stirring after 45 minutes, add deionized water to the dispersed mixture to a total amount of 20 g, set aside. The specific structure of pyrazolotriazole coupler and anti-fading agent is as follows:

Example 3

Preparation of color coupler oil emulsion C:

With embodiment 2, just anti-fading agent is 0g.

Example 4

Preparation of color coupler oil emulsion D:

With embodiment 2, just anti-fading agent is 0.5g.

Example 5

Preparation of color coupler oil emulsion E:

With embodiment 2, just anti-fading agent is 1.5g.

Example 6

Preparation of UV absorber oil emulsion B:

1.0g of UV absorber was dissolved in a mixture composed of dibutyl phthalate, tributyl phthalate and ethyl acetate in a ratio of 2:1:9 (volume ratio), and the mixture was heated to 70°C To form a solution, add 8 ml of 10% gelatin aqueous solution and 0.4 ml of 10% sodium lauryl sulfate under high-speed stirring. Stop stirring after 45 minutes, add deionized water to the dispersed mixture to a total amount of 20 g, set aside. The specific structure of the UV absorber is as follows:

Preparation process of silver halide color photographic paper:

The arrangement structure of each layer of silver halide color photographic paper is described in detail in Research Disclosure, vol.365, 1994, Item36544, Section XI. Apply the following layers:

surface protection layer

UV absorbing layer②

red layer

UV absorbing layer①

green layer

Compartment

blue layer

Support (paper base)

In the preparation process of silver halide color photographic paper, the oil emulsions of the above layers are prepared first, and then the oil emulsions of each layer are coated on the paper support coated with polyethylene in the gel sublayer, and dried to obtain color photographic paper. .

Comparative example 4

Preparation of color photographic paper 1:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion A in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion B, SB anti-pollution agent (produced by Lucky Film Company) oil emulsion 10g and ultraviolet Absorbent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 7×10 ^-4 mol/m ² , In a dark room state, the above 7 layers were coated on a plastic-coated polyethylene-coated support with a gel sublayer, and dried to obtain color photographic paper 1, which was processed according to the RA-4 process, and its performance was measured.

Comparative Example 5

Preparation of color photographic paper 2:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion A, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of the green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 7×10 ^-4 mol/m ² , In the dark room state, the above 7 layers were coated on the plastic-coated polyethylene support of the gel bottom layer, and dried to obtain color photographic paper 2, which was processed according to the RA-4 process, and its performance was measured.

Comparative Example 6

Preparation of color photographic paper 3:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion C, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of the green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 7×10 ^-4 mol/m ² , In the dark room state, the above 7 layers were coated on the plastic-coated polyethylene support of the gel bottom layer, and dried to obtain color photographic paper 3, which was processed according to the RA-4 process, and its performance was measured.

Comparative Example 7

Preparation of color photographic paper 4:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion B, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion A, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of the green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion A, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorption layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion and UV absorber oil emulsion A, place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion A in the coating is the conventional amount in the color photographic paper. In the dark room state, the above 7 The layer was coated on the plastic-coated polyethylene support of the gel bottom layer, and dried to obtain color photographic paper 4, which was processed according to the RA-4 process, and its performance was measured.

Example 7

Preparation of color photographic paper 5:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion B, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 7×10 ^-4 mol/m ² , In the dark room state, the above 7 layers were coated on the plastic-coated polyethylene support of the gel sublayer, and dried to obtain color photographic paper 5, which was processed according to the RA-4 process, and its performance was measured.

Example 8

Preparation of color photographic paper 6:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of the green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 7×10 ^-4 mol/m ² , In the dark room state, the above 7 layers were coated on the plastic-coated polyethylene support of the gel sublayer, and dried to obtain color photographic paper 6, which was processed according to the RA-4 process, and its performance was measured.

Example 9

Preparation of color photographic paper 7:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion E, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of the green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 7×10 ^-4 mol/m ² , In the dark room state, the above 7 layers were coated on the plastic-coated polyethylene support of the gel sublayer, and dried to obtain color photographic paper 7, which was processed according to the RA-4 process, and its performance was measured.

Example 10

Preparation of color photographic paper 8:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion B, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of the green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 5×10 ^-4 mol/m ² , In the dark room state, the above 7 layers were coated on the plastic-coated polyethylene support of the gel bottom layer, and dried to obtain color photographic paper 8, which was processed according to the RA-4 process, and its performance was measured.

Example 11

Preparation of color photographic paper 8:

1. Blue-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of oil emulsion of H-118 yellow coupler (produced by Beijing Chemical Factory) and DB anti-pollution agent (Lucky Film Company Production) 10g of oil emulsion, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of blue-sensing layer emulsion B in a dark room, and set aside;

2. Interlayer: Add 45g of gelatin to 500ml of deionized water, soak the gelatin at room temperature until it swells, then add 25g of SB anti-pollution agent (manufactured by Lucky Film Company) oil emulsion, place in a constant temperature water bath at 40°C and stir until fully dissolved ,spare;

3. Green-sensing layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add 250g of magenta coupler oil emulsion B, 10g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorption Agent oil emulsion B, placed in a 40°C constant temperature water bath and stirred until fully dissolved, added 50g of the green-sensing layer emulsion in a dark room, and set aside;

4. Ultraviolet absorbing layer ①: Add 30g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

5. Red-sensitive layer: Add 15g of gelatin to 200ml of deionized water, soak the gelatin at room temperature until it swells, then add Q-399 cyan coupler (produced by Shenyang Photosensitive Research Institute) oil emulsion and SB anti-pollution agent (Lucky Film Company Production) oil emulsion 10g, placed in a constant temperature water bath at 40°C and stirred until fully dissolved, added 50g of red-sensing layer emulsion in a dark room, and set aside;

6. Ultraviolet absorbing layer ②: Add 20g of gelatin to 300ml of deionized water, soak the gelatin at room temperature until it swells, then add 30g of SB anti-pollution agent (produced by Lucky Film Company) oil emulsion and UV absorber oil emulsion B, and place in Stir in a constant temperature water bath at 40°C until fully dissolved, and set aside;

7. Surface protection layer: Add 30g of gelatin to 400ml of deionized water, soak the gelatin at room temperature until it swells, then place it in a constant temperature water bath at 40°C and stir until fully dissolved, and set aside;

Add 1292 surfactant and H-11 film hardening agent before coating, and apply by extrusion. The amount of UV absorber oil emulsion B in the color photographic paper is 1×10 ^-3 mol/m ² , In the dark room state, the above 7 layers were coated on the plastic-coated polyethylene support of the gel bottom layer, and dried to obtain color photographic paper 9, which was processed according to the RA-4 process, and its performance was measured.

Table 1: Photo performance test data table

Performance Items Comparative example 4 (color photographic paper 1) Embodiment 7 (color photographic paper 5) Min Density 0.09 0.09 Sensitivity 100 100 Contrast 40 38 Maximum Density 2.00 2.05 Emulsion particle size 0.80μm 0.55μm

in FIG. 1:

The minimum density is the color density when the exposure amount is 0; the sensitivity is the reciprocal of the exposure amount necessary to make the color density 0.6 higher than the minimum color density, and it is displayed as a relative value. Take the sensitivity of photographic material 02 as 100; contrast The difference between the logarithm of the exposure required to make the color density 0.7 and the logarithm of the exposure required to make the color density 1.7; the maximum density is the differential value of the color density and the logarithm of the required exposure at this time is less than Or the color density at 0.05.

Table 2: Performance test data table of anti-fatigue liquid

series Example   After developing a certain amount of color photographic paper, the density of the blue layer of the sample senses attenuation 10m ² 20m ² 30m ² 40m ² 50m ² Level 1 Comparative example 4 (photo paper 1) 19.0% 42.2% 59.5% 70.0% 76.3% Embodiment 7 (photo paper 5) 4.7% 8.1% 16.1% 34.7% 50.8% level 4 Comparative example 4 (photo paper 1) 17.2% 40.0% 57.7% 69.8% 75.9% Embodiment 7 (photo paper 5) 3.8% 4.5% 13.1% 31.8% 43.3% Level 7 Comparative example 4 (photo paper 1) 13.2% 16.2% 30.9% 33.5% 61.8% Embodiment 7 (photo paper 5) 0.4% 3.8% 9.5% 14.8% 30.4%

In Table 2:

In the performance table of anti-fatigue liquid, the density attenuation of the blue-sensitive layer is the absolute value and the initial density value of the differences between the color density values of all levels and the initial density values of the exposed spare samples washed after a certain area of general-purpose color photographic paper is washed. The smaller the percentage is, the smaller the density attenuation of the blue layer is, indicating that the photographic material is more resistant to fatigue liquid.

Table 3: Color Balance Performance Test Data Sheet

series photographic paper          After developing a certain amount of general-purpose color photographic paper, the color balance performance of the sample Density of red-sensing layer - density of blue-sensing layer           Density of the green-sensing layer - Density of the blue-sensing layer 10m ² 20m ² 30m ² 40m ² 50m ² 10m ² 20m ² 30m ² 40m ² 50m ² Level 1 1 0.40 0.94 1.30 1.49 1.56 0.38 0.52 0.88 0.97 1.18 5 0.04 0.16 0.28 0.57 0.83 0.03 0.14 0.22 0.42 0.65 level 4 1 0.28 0.71 1.01 1.18 1.15 0.21 0.57 0.82 0.92 1.05 5 0.04 0.09 0.18 0.39 0.56 0.02 0.05 0.10 0.25 0.45 Level 7 1 0.02 0.02 0.07 0.09 0.19 0.03 0.04 0.06 0.09 0.18 5 0.02 0.02 0.03 0.05 0.07 0 0 0.01 0.03 0.04

In Table 3:

The difference between the density of the red-sensing layer and the density of the blue-sensing layer and the difference between the density of the green-sensing layer and the density of the blue-sensing layer at the initial time (when the color photographic paper is not developed) are both 0, and the general-purpose color photographic paper of a certain area is washed and washed. The greater the relative value of the difference between the density of the red-sensing layer and the density of the blue-sensing layer and the difference between the density of the green-sensing layer and the density of the blue-sensing layer of the exposed spare sample, the worse the color balance is.

Table 4: Test data table of density attenuation amplitude of green-sensing layer

Example Sensitive blue emulsion Product coupler oil emulsion coupler: anti-fading agent UV absorber and dosage Green layer density value attenuation 1.0 Density 2.0 density Comparative Example 5 B Pyrazolone type B7×10 ^-4 mol/m ² 39.0% 33.5% Comparative Example 6 B B1:0 B7×10 ^-4 mol/m ² 55.0% 46.0% Comparative example 7 B B1:1 Benzotriazole type 21.0% 15.5% Example 7 B B1:1 B7×10 ^-4 mol/m ² 12.0% 9.0% Example 8 B B1:0.5 B7×10 ^-4 mol/m ² 35.0% 30.5% Example 9 B B1: 1.5 B7×10 ^-4 mol/m ² 7.0% 6.5% Example 10 B B1:1 B5×10 ^-4 mol/m ² 18.0% 10.0% Example 11 B B1:1 B1×10 ^-3 mol/m ² 8.0% 7.5%

In Table 4:

Color photographic papers 2, 3, 4, 6, 7, 8, and 9 were subjected to graded exposure with a sensitometer, processed, and the density values of the green-sensing layers at all levels were measured, and then the measured photographic materials were exposed to strong sunlight for 60 days and then re- Measure the densities at all levels and compare them with the density values before strong light irradiation to obtain the density attenuation range of the green-sensitive layer. The smaller the attenuation range, the better the image photostability of the photographic material.

Table 5: Formaldehyde resistance performance test data table

Example Fumigation conditions Performance of green layer minimum density Sensitivity Maximum Density Comparative example 5 (photo paper 2) Before fumigation 0.08 100 1.83 Fumigation 1 0.07 64 1.25 Fumigation 2 0.08 27 0.48 Embodiment 7 (photo paper 5) Before fumigation 0.08 100 1.92 Fumigation 1 0.08 93 1.85 Fumigation 2 0.09 89 1.76

In Table 5:

Put photographic paper 2 and photographic paper 5 in a closed stainless steel cylinder containing formaldehyde gas, and then fumigate them in a 40°C incubator for 16 hours, then expose, process, and measure properties according to the aforementioned method.

Fumigation 1: add 0.1ml formaldehyde to 50ml water;

Fumigation 2: Add 0.5ml formaldehyde to 50ml water.

Beneficial effect

It can be seen from the data in Tables 1 to 5 that the color photographic paper obtained by adopting the technical solution of the present invention has good color reproduction, image light stability and fatigue resistance to liquid medicine.

Claims (3)

1. a silver halides colourful photographic paper comprises support and emulsion layer, it is characterized in that:

(1) the blue layer of sense emulsion employing mean grain size is the fine particle of 0.55 μ m on its support;

(2) green layer adopts the combination of Pyrazolotriazole magenta colour coupler (formula 3) and the anti-fading agent (formula 4) and the ultraviolet absorber (formula 5) of following structure on its support:

Formula 3

Formula 4

Formula 5

In the formula 3, R ₁Be hydrogen atom, methyl or butyl; R ₂Be C ₁～C ₅Alkyl;

In the formula 4, R ₃Be hydrogen atom, C ₁₀～C ₂₀Alkyl, hydroxyl or aryl;

In the formula 5, R ₄, R ₅, R ₆Be phenolic group;

The weight ratio of wherein said anti-fading agent and Pyrazolotriazole magenta colour coupler is 0.5～1.5: 1; The consumption of described ultraviolet absorber in silver halides colourful photographic paper is 5.0 * 10 ^-4Mol/m ²～1.0 * 10 ^-3Mol/m ²

2. silver halides colourful photographic paper according to claim 1 is characterized in that, wherein said emulsion is chlorine silver bromide emulsion, and wherein chlorinity is 98% or higher.

3. silver halides colourful photographic paper according to claim 1 is characterized in that, wherein said emulsion is the monodispersion cubic particle.