Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/392—Additives
  • G03C7/39208—Organic compounds
  • G03C7/3924—Heterocyclic
  • G03C7/39244—Heterocyclic the nucleus containing only nitrogen as hetero atoms
  • G03C7/39256—Heterocyclic the nucleus containing only nitrogen as hetero atoms three nitrogen atoms
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
  • G03C1/815—Photosensitive materials characterised by the base or auxiliary layers characterised by means for filtering or absorbing ultraviolet light, e.g. optical bleaching
  • G03C1/8155—Organic compounds therefor

Definitions

• the present invention relates to a light-sensitive silver halide photographic material containing an UV absorbent.
• Examples of such influence include an undesirable sensitization attributable to static light generated in coating and drying processes or in transit of a photographic material, and deterioration in color reproducibility due to difference in ultraviolet intensities of various light sources in photographing.
• dye images are so susceptible to ultraviolet rays that a large color fading is caused during display by the sunlight containing much ultraviolet rays, losing the aesthetic value.
• UV absorbent In order to reduce the adverse influence of ultraviolet rays, it is widely known and practiced to introduce an UV absorbent to a silver halide emulsion layer or a nonlight-sensitive photographic layer of a photographic product.
• a large number of UV absorbents there are proposed a large number of UV absorbents, and general characteristics required of them are (1) having no absorption in a visible light area, (2) having no influence on a photographic product, (3) being highly soluble in a high boiling organic solvent and (4) being highly light-fast in themselves because they are used to prevent the adverse influence of light irradiation over a long period.
• One method is what is called Fisher type dispersing method in which finely pulverized particles are dispersed.
• Another method is to add a polymer latex and water little by little to a water-miscible organic solvent dissolving an UV absorbent until the UV absorbent becomes insoluble, so that the UV absorbent is incorporated into particles of the polymer latex.
• Japanese Patent O.P.I. Publication Nos. 59942/1976 and 59943/1974 describe in detail such water-miscible organic solvents and polymer lattices capable of being filled with an UV absorbent.
• a third method comprises the steps of dissolving an UV absorbent in a water-insoluble high boiling organic solvent or polymer and then dispersing it finely in a hydrophilic colloid to obtain an oil-in-water type dispersion.
• This dispersing method is described in U.S. Patent Nos. 2,322,027, 2,801,170, 2,801,171, 2,870,012 and 2,991,177.
• the application of this method to an UV absorbent is disclosed in U.S. Patent No. 2,739,888.
• the third method is most widely used for reasons that it is suitable for a large-scaled production because it does not thicken a coating solution in preparation thereof as well as it allows an UV absorbent to exhibit a good adsorbency.
• this method has a disadvantage that dispersed particles tend to become coarse ones or to crystallize owing to a low stability of the dispersion, which may cause a big trouble in a production process.
• UV absorbent is effective to improve the light-fastness (and resistance against static marks), but any of conventional methods could hardly prevent the color fading of a dye image exposed to various light sources.
• Using an UV absorbent in a large amount can improve the light-fastness in various light sources to some extent, but it is not substantial.
• use of an excessive UV absorbent causes a suspensoid to deposit and thereby ultraviolet absorbency decreases rapidly, deteriorating the light-fastness or causing a trouble in the coating process.
• This method is effective in lessening the liability to deposition but not satisfactory, and is less effective to prevent dispersed particles becoming coarse ones as time elapses.
• the light-fastness in various light sources is not improved so much, either.
• a fluorescent brightener is known as an effective means to enhance the whiteness of a light-sensitive material.
• the photographic processing is carried out with a color developer containing a fluorescent brightener as described in Japanese Patent Examined Publication Nos. 35240/1971, 20975/1974 and 25336/1975. This method, however, is insufficient in fluorescent brightening effect and in stability of the developer. Therefore, it cannot meet the recent demand for rapid and diversified processing.
• Another method of using a fluorescent brightener comprises to contain a fluorescent brightener in a light-sensitive material.
• a fluorescent brightener in a light-sensitive material.
• Such a method can be seen in, for example, Japanese Patent Examined Publication Nos. 21189/1971, 27692/1973, 10696/1974, 28225/1976, and 32254/1977.
• This method is more effective than the above method in which a fluorescent brightener is contained in a developer, and provides a larger fluorescent intensity; thereby the whiteness in an unexposed area is much more enhanced.
• the fluorescent brightener is contained in one of photographic structural layers including a support covering layer, emulsion layer and non-emulsion layer, singly or in combination with a compound in addition to the fluorescent brightener to strengthen the brightening effect.
• This method is effective in enhancing the whiteness of an unexposed area, but it has a serious drawback of generating a static trouble such as static marks when a photographic structural layer is coated on a support at a high speed, when a light-sensitive material is conveyed in a color printer for printing, or when a tape sticked on the surface of a light-sensitive material is peeled off.
• UV absorbent is effective in improving the light-fastness and practiced widely; many useful methods are proposed for further improvement.
• UV absorbent absorbs excitation light for a fluorescent brightener and makes the fluorescence function to enhance the whiteness inactive. Therefore, it has been difficult to enhance the whiteness concurrently with the light-fastness of a color image or the static resistance.
• silver halide photographic light-sensitive materials are continuously processed in an automatic developing machine installed in each processing laboratory.
• processing laboratories are demanded to process photographic materials and return them to customers on the very day that the photographic materials are brought in for processing, and even a returning within several hours is demanded in recent years; therefore, the necessity for rapid processing has come to be much stronger.
• a shorter processing time improves the production efficiency and reduces the processing cost. This is another reason why rapid processing and high-speed printing are required.
• the shape, size and composition of silver halide grains in a silver halide emulsion used in a light-sensitive material have a large influence on developing speed.
• the halogen composition has the largest influence, and use of a high-chloride-containing silver halide gives a particularly higher developing speed.
• the present inventors tried various approaches to solve the problems and have found that a light-sensitive material excellent in both whiteness and light-fastness and having an improved resistance to sweating is obtained with specific UV absorbents.
• One object of the present invention is to provide a light-sensitive material improved in both whiteness and light-fastness.
• Another object of the present invention is to provide a light-sensitive material free from sweating and excellent in both whiteness and light-fastness over a long period of storing.
• a third object of the present invention is to provide a photographic element excellent in light-fastness of dye images and whiteness of a white area.
• a fourth object of the present invention is to provide a silver halide photographic light-sensitive material having an excellent resistance to static marks and a high whiteness.
• a fifth object of the present invention is to provide a dispersion capable of imparting a stable and high ultraviolet absorbing effect.
• a sixth object of the present invention is to provide a dispersion capable of imparting an enhanced light-fastness stable enough against various light sources when used in a photographic product.
• a seventh object of the present invention is to provide a silver halide photographic light-sensitive material free from light-fastness deterioration and light stain even when subjected to rapid processing.
• An eighth object of the present invention is to provide a silver halide photographic light-sensitive material having an improved resistance against static light fogging in rapid processing or in printing in a high-speed printer.
• the light-sensitive material of the invention comprises at least one light-sensitive layer, wherein at least one light-sensitive layer and/or at least one nonlight-sensitive layer contains the compound represented by Formula I.
• R1 represents a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group
• R2 represents a substituted or unsubstituted alkyl group having a total number of carbon atoms of eight or more, or a substituted or unsubstituted aryl group
• R3 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group
• n represents an integer of zero to
• R1 is a halogen atom (e.g., fluorine atom, chlorine atom, bromine atom), an alkyl group (e.g., methyl, ethyl) , an aryl group (e.g., phenyl), an alkoxy group (e.g., methoxy) or an aryloxy group (e.g., phenoxy).
• halogen atom e.g., fluorine atom, chlorine atom, bromine atom
• an alkyl group e.g., methyl, ethyl
• an aryl group e.g., phenyl
• an alkoxy group e.g., methoxy
• an aryloxy group e.g., phenoxy
• R2 is a substituted or unsubstituted alkyl group (e.g., 2-ethyl-hexyl, sec-dodecyl, iso-tridecyl, cis-9-octadecenyl, octyloxycarbonylethyl) or an aryl group (e.g., phenyl).
• alkyl group e.g., 2-ethyl-hexyl, sec-dodecyl, iso-tridecyl, cis-9-octadecenyl, octyloxycarbonylethyl
• aryl group e.g., phenyl
• R3 is an alkyl group (e.g., t-amyl, methyl), an aryl group (e.g., phenyl), an alkoxy group (e.g., methoxy, 2-ethyl-hexyloxy) or an aryloxy group (e.g., phenoxy).
• the compound represented by Formula I may be added in either a light-sensitive layer or a nonlight-sensitive layer, but preferably it is added at least in a nonlight-sensitive layer, and more preferably it is added at least in a nonlight-sensitive layer farther from a support than the farthest light-sensitive layer from the support.
• An addition amount is not particularly limited, but preferably 0.05 to 15 g/m2, and more preferably 0.1 to 5 g/m2.
• a dispersion suspending oily droplets containing another UV absorbent than those represented by the Formula I be used, in order to provide a stable and high ultraviolet absorption function and thereby to impart a function of enhancing light-fastness to various light sources.
• Such plural UV absorbents are preferably contained as a mixture of at least one of the compound represented by the foregoing Formula I and at least one of the compound represented by the following Formula II.
• R21, R22 and R23 each represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkenyl group, a nitro group or a hydroxyl group.
• R2 ⁇ represents a branched alkyl group having a number of carbon atoms of eight or more (e.g., iso-tridecyl), and X' represents a hydrogen atom or a chlorine atom.
• X'' represents a hydrogen atom or a chlorine atom, preferably a chlorine atom
• R4 and R5 each represent an alkyl group having total number of carbon atoms of six or more (e.g., ethyl and butyl respectively).
• R21, R22 and R23 each represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkenyl group, a nitro group or a hydroxyl group.
• the preferred ones are a hydrogen atom, an alkyl group, an alkoxy group and an aryl group.
• the particularly preferred ones are a hydrogen atom, an alkyl group and an alkoxy group.
• the particularly preferred ones are a hydrogen atom, a halogen atom, an alkyl group and an alkoxy group.
• At least one is preferably an alkyl group, and more preferably at least two are alkyl groups.
• a dispersion containing the compounds represented by Formulas I and II can be favorably used in a silver halide photographic light-sensitive material.
• the dispersion of the invention When the dispersion of the invention is used in a light-sensitive material, it may be added in either a light-sensitive layer or a nonlight-sensitive layer, but preferably it is added in a nonlight-sensitive layer. More preferably, it is added in a nonlight-sensitive layer farther from a support than the farthest light-sensitive layer from the support.
• Addition amounts of the compounds of Formula I and the compound of Formula II in a light sensitive material are not particularly limited, but preferably 0.05 to 15 g/m2, and more preferably 0.1 to 5 g/m2, respectively.
• An addition ratio of the-compound-of-Formula-I to the-compound-of-Formula-II is preferably 1:99 to 99:1, and more preferably 20:80 to 80:20.
• the photographic light-sensitive material of the invention employs the fluorescent brightener represented by the following Formula III.
• R1, R2, R3 and R4 may be the same or different from one another and each represent a substituted or unsubstituted alkyl group (e.g., 2-ethylamino-ethyl, ethyl), a substituted or unsubstituted alkylamino group (e.g., N,N-diethylamino, N,N-di-hydroxyethylamono), a substituted or unsubstituted arylamino group (e.g., phenylamino) or a substituted or unsubstituted aryloxy group (e.g., phenoxy);
• X1 and X2 each represent a substituted or unsubstituted alkyl group (e.g., 2-ethylamino-eth
• -SO3M group is contained in a number of 1 to 6 including those which may be substituted in each of R1 to R4.
• fluorescent brighteners can be synthesized by a conventional method described, for example, on page 8 of "Fluorescent Brighteners", published by Kaseihin Kogyo Kyokai(Japan Association of Chemical Compound), 1976.
• the fluorescent brightener of the invention may be added in a light-sensitive layer and/or a nonlight-sensitive layer, or in a support of a silver halide photographic light-sensitive material. It can also be added as a supersensitizer to a silver halide emulsion. Further, it can be retained in a finished photographic constituent by being added to a developer bath or a stabilizer bath.
• an addition amount is preferably 0.01 to 2 g/m2, and more preferably 0.02 to 1 g/m2; when it is added to a developer bath, an addition amount is preferably 0.1 to 2 g per liter, more preferably 0.5 to 1.5 g per liter of developer; and when it is added to a stabilizer bath, an addition amount is preferably 0.1 to 2 g per liter, more preferably 1 to 2 g per liter of stabilizer.
• silver halide grains having a silver chloride content of more than 90 mol% are used at least in one silver halide light-sensitive layer.
• Said silver halide grains have preferably a silver chloride content of more than 90 mol%, and a silver bromide content of less than 10 mol%, and a silver iodide content of less than 0.5 mol%. More preferably, said silver halide is a silver chlorobromide containing 0.1 to 2 mol% of silver bromide.
• the silver halide grains employed in the silver halide photographic light-sensitive material of the invention may be used singly or in combination with other silver halide grains of different composition. They may also be used together with silver halide grains having a silver chloride content of less than 10 mol%.
• said silver halide grains with a silver chloride content of more than 90 mol% account for more than 60 wt%, preferably more than 80 wt% of the total silver halide grains contained in said emulsion layer.
• composition of silver halide grains used in the invention may be uniform throughout the grain or different from inner portion to outer portion of the grain. In case of the grains whose composition is different from inner portion to outer portion, the composition may change continuously or discontinuously.
• a grain size of the silver halide grains used in the invention is not particularly limited; but it is preferably 0.2 to 1.6 ⁇ m, and more preferably 0.25 to 1.2 ⁇ m taking photographic properties such as rapid processability and sensitivity into consideration.
• the grain size can be measured by various methods generally known in the photographic art. The typical methods are those described in "Analysis Method of Grain Size” (pp. 94-122, A.S.T.M. Symposium on Light Microscopy, 1955) or Chapter 2 of "The Theory of the Photographic Process” (by Mees and James, 3rd edition, published from Macmillan Company (1966).
• This grain size can be determined using a grain's projected area or directly from an approximate value. When grains have a substantially uniform shape, their grain size distribution can be expressed fairly accurately in diameters or projected areas.
• the grain size distribution of the silver halide grains used in the invention may be either polydispersed or monodispersed; but it is preferred that a variation coefficient be less than 0.22 in the grain size distribution of silver halide grains, and monodispersed silver halide grains having a variation coefficient of less than 0.15 are much more preferred.
• This variation coefficient is a coefficient to indicate an extent of a grain size distribution and defined by the following expression: wherein ri represents a size of each grain and ni represents the number of grains.
• grain size means a diameter for a spherical silver halide grain, or a diameter of a circle converted into the same area from a projected image for a grain of cubic or nonspherical shape.
• the silver halide grains used in an emulsion of the invention may be prepared any of the acid method, neutral method and ammonia method. Said gains may be grown in one step, or may be grown after preparing seed grains. The method of growing grains and that of preparing seed grains may be the same or different from each other.
• a method to react a soluble silver salt with a soluble halogen salt there may be used any of the single jet method, reverse jet method and double jet precipitation method, but the jet precipitation method is preferred.
• the pAg controlled double jet method which is described in Japanese Patent O.P.I. Publication No. 48521/1979 as a version of the jet precipitation method, is also usable.
• a silver halide solvent such as thioether may be used.
• the silver halide grains of the invention may be of any crystal form, but one of the preferred examples is a cube having (100) faces as a crystal face.
• silver halide grains having a crystal form of octahedron, tetradecahedron or dodecahedron which are prepared by methods described in specifications such as U.S. Patent Nos. 4,183,756, 4,225,666, Japanese Patent O.P.I. Publication No. 26589/1880, Japanese Patent Examined Publication No. 42737/1980 and literatures such as The Journal of Photographic Science, 21 , 39 (1973). Further, grains having twin faces may be used, too.
• silver halide grains of the invention there may be added a cadmium salt, zinc salt, lead salt, thallium salt, iridium salt or complex thereof, rhodium salt or complex thereof, iron salt or complex thereof, in a process to form grains and/or in a process to grow grains, so that metal ions can be contained inside of the grains and/or on the surface thereof. Further, reduction sensitized specks can be formed inside of grains or the surface thereof by keeping the grains in an appropriate reducing environment.
• the emulsion containing the silver halide grains of the invention may be subjected to desalting process after the growth of silver halide grains to remove useless soluble salts, or such salts may be left in the emulsion.
• the desalting can be performed according to the method described in Research Disclosure No. 17643.
• the silver halide grains used in the invention may be those in which latent images are mostly formed on the surface of grains, or those in which latent images are mostly formed inside of grains; but, preferred grains are those in which latent images are mostly formed on the surface of grains.
• the emulsion of the invention can be chemically sensitized according to conventional methods; that is, there can be used singly or in combination of various methods such as sulfur sensitization using a sulfur containing compound capable of reacting with silver ions or an active gelatin, selenium sensitization with a selenium compound, reduction sensitization with a reducing compound and precious metal sensitization using a compound of gold or other precious metals.
• a chalcogen sensitizer can be used as a chemical sensitizing agent.
• "Chalcogen sensitizer” is a general term for sulfur sensitizers, selenium sensitizers and tellurium sensitizers; for photographic purpose, sulfur sensitizers and selenium sensitizers are preferred.
• the sulfur sensitizer include thiosulfates, allylthiocarbamide, thiourea, allylisothiocyanate, cystine, p-toluenethiosulfonates and rhodanine.
• Other examples are sulfur sensitizers described in U.S. Patent Nos.
• selenium sensitization can be used.
• Usable selenium sensitizers are aliphatic isoselenocyanates such as allylisoselenocyanate, selenoureas, selenoketones, selenoamides, selenocarboxylates, selenophosphates, diethylselenide, diethyldiselenide; details of which are described in U.S. Patent Nos. 1,574,944, 1,602,592 and 1,623,499.
• reduction sensitizing can be jointly used.
• Usable reducing agents are tin (II) chloride, dioxythiourea, hydrazine and polyamines.
• the silver halide grains used in the invention contain a gold compound.
• the preferred gold compounds are those having a gold's oxidation number of +1 or +3, such as chloroaurates, potassium chloroaurate, auric tricloride, potassium auric thiocyanate, potassium iodoaurate, tetracyanoauric acid, ammonium aurothiocyanate, pyridyltrichloro gold, gold sulfide and gold selenide.
• the gold compound may be used to sensitize silver halide grains, or may be used in a way which does not substantially contribute to sensitizing.
• An addition amount of the gold compound varies depending upon conditions, but it is usually 10 ⁇ 8 to 10 ⁇ 1, preferably 10 ⁇ 7 to 10 ⁇ 2 mol per mol of silver halide.
• the addition may be made during silver halide grain formation, physical ripening or chemical ripening, or after chemical ripening.
• the emulsion of the invention can be spectrally sensitized to a desired wavelength region with a dye known as a sensitizing dye in the photographic art.
• the sensitizing dye may be used singly or in combination.
• the silver halide photograhic light-sensitive material containing the emulsion of the invention can be a negative or positive film, or a color photographic paper, and is best suited to a color photographic paper for appreciation which displays the effect of the invention most conspicuously.
• These light-sensitive materials including a color photographic paper may be for the use of black and white photography or for multicolor application.
• plural silver halide emulsion layers containing magenta, yellow and cyan couplers as photographic couplers and plural nonlight-sensitive layers are usually provided on a support in an appropriate layer order. The number of layers and the layer order may be changed according to a primary performance and use.
• the preferred layer structure of the multicolor photographic light-sensitive material of the invention is that in which a yellow dye image forming layer, intermediate layer, magenta dye image forming layer, intermediate layer, cyan dye image forming layer, intermediate layer and protective layer are sequentially provided on a support in this order.
• dye image forming couplers which react with an oxidation product of an aromatic primary amine developing agent to form dyes.
• Said dye forming couplers are normally selected so as to form dyes which absorb light-sensitive spectral light of respective emulsion layers; that is, a yellow dye forming coupler is used in a blue-sensitive emulsion layer, a magenta dye forming coupler in a green-sensitive emulsion layer, and a cyan dye forming coupler in a red-sensitive emulsion layer.
• the light-sensitive material may be prepared by a combination other than the above when a specific requirement arises.
• the dye forming coupler used in the invention possess in the molecule a group called ballast group which has 8 or more carbon atoms and prevents the coupler to diffuse.
• Preferred yellow dye forming couplers are of acylacetanilide type; benzoylacetanilide compounds and pivaloylacetanilide compounds are particularly preferred.
• Examples of usable yellow couplers are those described in British Patent No. 1,077,874, Japanese Patent Examined Publication No. 40757/1970, Japanese Patent O.P.I. Publication Nos. 1031/1972, 26133/1972, 94432/1973, 87650/1975, 3631/1976, 115219/1977, 99433/1979, 133329/1979, 30127/1981 and U.S. Patent Nos.
• magenta dye forming coupler pyrazolone couplers may be used, but pyrazolotriazole coupler are preferred.
• magenta couplers examples include those described in Japanese Patent Application No. 166895/1988, U.S. Patent No. 3,725,065, and Japanese Patent O.P.I. Publication Nos. 99437/1984, 42045/1983, 162548/1984, 171956/1884, 33552/1985, 43659/1985, 172982/1985, 190779/1985.
• cyan dye forming coupler As the cyan dye forming coupler, cyan dye forming couplers of phenol type or naphthol type are used.
• the above dye forming couplers may be used in a silver halide emulsion layer in an amount of 1 X 10 ⁇ 3 to 1 mol, preferably 1 X 10 ⁇ 2 to 8 X 10 ⁇ 1 mol per mol of silver halide.
• the compound represented by Formula I and the compound represented by Formula II can be made into a dispersion by various dispersing methods such as oil protect dispersing, dispersing with a water-insoluble polymer and dispersing with a latex.
• the useful compounds of the invention including the compound represented by Formula I and the compound represented by Formula II are dissolved in a high boiling organic solvent of 150°C or more, or in a mixture thereof with a low boiling organic solvent and/or a water-soluble organic solvent if necessary, then dispersed with the aid of surfactant in a hydrophilic binder such as aqueous gelatin solution using a dispersing means such as stirrer, homogenizer, colloid mill or supersonic apparatus, and subsequently added in an hydrophilic colloid layer.
• a process to remove the low boiling organic solvent may be provided after or during dispersing.
• High boiling solvents used to disperse the compounds represented by Formula I or II are preferably those having a dielectric constant of 5.5 or less, such as phthalates, phosphates, amides of organic acids, ketones and hydrocarbons each having a dielectric constant of 5.5 or less.
• Much preferred high boiling organic solvents are those having a dielectric constant of 1.9 to 5.0 and a vapor pressure of 0.5 mmHg or less at 100°C.
• phthalates and phosphates are more preferable.
• the most preferable solvent is dialkyl phthalate having alkyl groups of 9 or more carbon atoms.
• the high boiling solvent may be a mixture of two or more types.
• the dielectric constant used here means a dielectric constant at 30°C.
• gelatin As a binder used in the photographic light-sensitive material containing the dispersion of the invention, gelatin is advantageously used.
• Other usable compounds are gelatin derivatives, graft polymers between gelatin and other polymers, proteins, sugar derivatives, cellulose derivatives and hydrophilic colloids such as synthetic hydrophilic homopolymers and copolymers.
• the photographic emulsion layers and other hydrophilic colloid layers containing the dispersion of the invention are hardened by employing, singly or in combination, a hardener which cross-links binder molecules to enhance the layer strength.
• the hardener is preferably added in these layers in an amount large enough to dispense with addition of the hardener to a processing solution, but the addition to a processing solution is also allowed.
• auxiliary layers such as a filter layer, antihalation layer and/or anti-irradiation layer.
• These layers and/or emulsion layers may contain a dye which is washed away from the color light-sensitive material or bleached in the developing process.
• a thickener may be employed in order to improve coating performance.
• Extrusion coating and curtain coating which can coat two or more layers simultaneously, are particularly useful.
• Developing agents used in the color developer of the invention include conventional ones widely employed in various color photographic processes.
• color developing is immediately followed by a processing with a solution having a bleaching capability
• said solution with a bleaching capability may be a processing solution having a fixing capability concurrently (what is called a bleach-fixer).
• a metal complex salt of organic acid is employed as a bleaching agent used in said bleaching process.
• magenta coupler M-A magenta coupler M-A in a mixed solvent of 80 ml of high boiling solvent DNP and 200 ml of ethyl acetate, the solution was added to a 5%-aqueous gelatin solution containing tri-isopropylnaphthalene sulfonic acid as a dispersing aid, and then the mixture was dispersed with a homogenizer. After making up the dispersion prepared to 1,500 ml, it was kept at 35°C.
• This dispersion was then added to 1,000 ml of a 3%-aqueous gelatin solution, and further 400 g of a green-sensitive silver chlorobromide emulsion (a monodispersed emulsion containing 80 mol% of silver bromide, weight of silver 30 g) was added thereto, so that a coating solution for a third layer was prepared. Similarly, coating solutions for other layers were prepared.
• a green-sensitive silver chlorobromide emulsion a monodispersed emulsion containing 80 mol% of silver bromide, weight of silver 30 g
• Coating weights were regulated to 0.8 g/m2 of yellow coupler Y-1, 0.3 g/m2 of antifading agent ST-1, 0.3 g/m2 silver equivalent of a blue-sensitive silver chlorobromide emulsion (containing 20 mol% of silver chloride and 80 mol% of silver bromide), 0.3 g/m2 of high boiling solvent DNP and 1.2 g/m2 of gelatin.
• Coating weights were reguluted to 0.05 g/m2 of hydroquinone derivative HQ-1 and 1.0 g/m2 of gelatin.
• 3rd layer green-sensitive emulsion layer
• Coating weights were regulated to 0.4 g/m2 of magenta coupler M-A, 0.2 g/m2 silver equivalent of a green-sensitive silver chlorobromide emulsion (containing 20 mol% of silver chloride and 80 mol% of silver bromide), 0.4 g/m2 of high boiling solvent DIDP, 0.01 g/m2 of AI-3 and 1.4 g/m2 of gelatin.
• Coating weights were regulated to 0.3 g/m2 of UV absorbent UV-1, 0.3 g/m2 of UV absorbent UV-2, 0.4 g/m2 of DNP, 0.05 g/m2 of hydroquinone derivative HQ-1, 0.02 g/m2 of AI-1, 1.0 g/m2 of gelatin and a trace of an oil-soluble bluing agent.
• Coating weights were regulated to 0.2 g/m2 of cyan coupler C-1, 0.2 g/m2 of cyan coupler C-2, 0.2 g/m2 of antifading agent ST-1, 0.4 g/m2 of DOP, 0.3 g/m2 silver equivalent of a red-sensitive silver chlorogromide emulsion (containing 20 mol% of silver chloride and 80 mol% of silver bromide) and 1.4 g/m2 of gelatin.
• Coating weights were regulated to 0.1 g/m2 of UV absorbent UV-1, 0.1 g/m2 of UV absorbent UV-2, 0.02 g/m2 of HQ-1, 0.1 g/m2 of polyvinylpyrrolidone, 0.2 g/m2 of DNP and 0.4 g/m2 of gelatin.
• Coating weight was regulated to 0.9 g/m2 of gelatin.
• Sample 1 was prepared as the above. Similar samples were prepared in the same manner as the above, except that UV absorbents, cyan couplers and yellow couplers used in the 4th, 5th and 6th layers were varied as shown in Table 1.
• the processing was carried out after running 50 m2 of a light-sensitive material with an automatic processor having a stabilizing unit of multistage counterflow type.
• each sample was subjected to a light-fastness test of cyan and yellow dye images and measurement of whiteness and sweating resistance.
• the unexposed area (white area) of each sample was evaluated with a color analyzer model 607 made by Hitachi, and then a* and b* values were calculated (a larger b* value indicates a higher yellowing).
• Samples were prepared in the same manner as in Example 1, except that the magenta coupler used in the 3rd layer of Example 1 was replaced by M-B and the antifading agent in the 3rd layer was changed as shown in Table 2. Further, samples were also prepared by changing the UV absorbents in the 4th and 6th layers and the magenta coupler and antifading agent in the 3rd layer as shown in Table 2. Each sample was exposed through a green optical wedge to obtain magenta dye images and then subjected to the evaluation in the same manner as that in Example 1.
• the samples of the invention listed in Tables 1 and 2 provided images better than those of the comparative samples in whiteness and light-fastness. Further, these had better sweating resistances and could form sharp images even after storage.
• Sample 29 of multilayered color photographic light-sensitive material was prepared by coating the layers shown in Table 3 on the right side of a paper support laminated with polyethylene containing titanium dioxide and a bluing agent on the right side and with polyethylene on the opposite side.
• the coating solutions were prepared by the following procedure.
• magenta coupler M-A Sixty ml of ethyl acetate was added to 35 g of magenta coupler M-A, 1.0 g of antistain agent HQ-1 and 30 g of high boiling solvent DNP to dissolve them. Next, the solution was dispersed in 200 ml of a 10% aqueous gelatin solution with a homogenizer to prepare a magenta coupler dispersion. This dispersion was then mixed with a green-sensitive silver halide emulsion (containing 27 g of silver) prepared under the following conditions, so that a coating solution for the 3rd layer was obtained.
• a green-sensitive silver halide emulsion containing 27 g of silver
• Coating solutions for other layers were prepared in the similar manner as that for the 3rd layer.
• pAg was controlled according to the method described in Japanese Patent O.P.I. Publication No. 45437/1984, and pH was controlled with addition of sulfuric acid or an aqueous solution of sodium hydroxide.
• Emulsion EMP-1 was then chemically sensitized for 90 minutes at 50°C using the following compounds to obtain a blue-sensitive silver halide emulsion (EmA).
• a monodispersed cubic emulsion (EMP-2) having an average grain size of 0.43 ⁇ m, a variation coefficient ( ⁇ / r ) of 0.08 and a silver chloride content of 99.5 mol% was prepared in the same manner as in emulsion EMP-1, except that the addition time of solutions A and B as well as that of solutions C and D were changed.
• Emulsion EMP-2 was subjected to chemical sensitization for 120 minutes at 55°C with the addition of the following compounds to obtain a green-sensitive silver halide emulsion (EmB).
• a monodispersed cubic emulsion (EMP-3) having an average grain size of 0.50 ⁇ m, a variation coefficient ( ⁇ / r ) of 0.08 and a silver chloride content of 99.5 mol% was prepared in the same manner as in emulsion EMP-1, except that the addition time of solutions A and B as well as the addition time of solutions C and D were changed.
• emulsion EMP-3 was chemically sensitized for 90 minutes at 60°C with the addition of the following compounds to obtain a red-sensitive silver halide emulsion (EmC).
• Reflection densities of green light were measured after and before exposing each sample to the sunlight for 30 days on an under-glass outdoor-exposing stand.
• the degree of color fading caused by exposure to light was determined by the following expression.
• the static mark resistance was rated by the number of static-mark-carrying prints per 100 prints when processed with a high speed printer operating at a speed of 20 million E-sized sheets per minute under a low humidity condition.
• sample 36 which contained an antistain agent in the 3rd layer, exhibited a much higher light fastness and a much lower yellow stain by light.
• Sample 37 exhibited a much higher static mark resistance.
• Samples were prepared by the same procedure as in Example 3, except that the couplers in sample 29 were replaced by the following Y-2, M-B, C-3 and the UV absorbents and antistain agents were used in varied combinations as shown in Table 5. Then, the samples were evaluated as in Example 3.
• the samples of the invention were high in light fastness and static mark resistance and less in yellow stain caused by exposure to light.
• Sample 50 was prepared in the same manner as in sample 29 of Example 3, except that antistain agents ST-3 and ST-4 were further added in the 3rd layer in amounts of 0.2 and 0.1 g/m2, respectively.
• Samples 51 to 70 were prepared in the same manner as in sample 41, except that the UV absorbents used in the 4th and 6th layers were changed and a fluorescent brightener was added in the 2nd layer as shown in Table 6. An addition amount of the fluorescent brightener was 0.1 g/m2.
• Samples prepared as above were processed in the same way as that of Example 3, and were evaluated for whiteness instead of yellow stains caused by exposure to light.
• Spectral reflection densities at an unexposed area were measured on each sample with a color analyzer model 607 made by Hitachi, and the intensity of fluorescence was given by a difference in reflection densities at 440 nm between measurements with and without a UV absorbing filter.
• Sample 71 was prepared in the similar manner as in Example 5, except that the yellow coupler, magenta coupler, cyan coupler and antifading agents ST-3 and ST-4 in the 3rd layer in sample 50 were changed to Y-2, M-B, C-3 and ST-5 and ST-6.
• samples 71 to 85 were prepared by changing the combination of UV absorbents used in the 4th and 6th layers as shown in Table 7.
• the samples prepared as above were processed, as in Example 5, with combinations of developers and stabilizers shown in Table 7, and then evaluated for the light fastness of a magenta image and intensity of fluorescence in a white area.
• the developers and stabilizers shown in Table 7 were as follows:
• samples 82 to 85 could form sharp images high in intensity of fluorescence, light fastness and whiteness.
• dispersions were prepared by varying the combination of two types of UV absorbents as shown in Table 8.
• the dispersions were prepared by the following procedure:
• Containers holding respective dispersion samples 101 to 110 were stoppered and allowed to stand for 48 hours at 40°C. After standing, the degree of crystal deposition in a dispersion was examined. The results are shown in Table 9.
• the degree of crystal deposition was measured by steps of diluting 100 ml of a dispersion with 100 ml of warm water, filtering the diluted dispersion under a reduced pressure with a filter paper No. 5A (product of Toyo Filter Paper), washing, drying and weighing deposits.
• multilayered silver halide photographic light-sensitive materials were prepared by employing each of the foregoing dispersions in the 4th and 6th layers by the procedure described below.
• magenta coupler M-A Sixty ml of ethyl acetate was added to 35 g of magenta coupler M-A, 1.0 g of antistain agent HQ-1 and 30 g of high boiling solvent DNP to dissolve them. The solution was dispersed in 200 ml of a 10% aqueous gelatin solution with a supersonic homogenizer to prepare a magenta coupler dispersion.
• the dispersion was then mixed with a green-sensitive silver halide emulsion (containing 27 g of silver) prepared under the following conditions, so that a coating solution for the 3rd layer was prepared.
• each sample was evaluated for the light fastness of magenta dye images by the following method.
• Reflection densities of green light were measured after and before exposing each sample to the sunlight for 30 days on an under-glass outdoor-exposing stand.
• the degree of color fading caused by exposure to light was determined by the following expression.
• each sample was also exposed to light of a daylight fluorescent lamp (20,000 lux) for 60 days.
• the degree of crystal deposition was measured by weighing deposits obtained through procedure of diluting 100 ml of a dispersion with 100 ml of warm water, filtering it under a reduced pressure with a filter paper No. 5A (product of Toyo Filter Paper), washing and drying.
• the samples of the invention were not only good in dispersibility but also high in light fastness to either of the light sources.
• Example 8 The procedure of Example 8 was repeated, except that the yellow coupler, magenta coupler, cyan coupler of sample 121, dye image stabilizers ST-3 and ST-4 used in the 3rd layer thereof and the UV absorbents in the 4th and 6th layers were varied as shown in Table 11.
• the samples of the invention had a high dispersion stability, besides being capable of forming images with a good light fastness to either of the light sources.
• Color photographic light-sensitive materials were prepared by forming the following 1st to 9th layers on the right side and the 10th layer on the opposite side of a paper support coated with polyethylene on both sides (thickness: 145 ⁇ m).
• the polyethylene on the right side of the support contained titanium white as a white pigment.
• Emulsions used were prepared in the same manner as in emulsion EM-11.
• compositions of the photographic structural layers are shown in the specification below, where the coating weight is mg/dm2, and that of a silver halide emulsion is a value converted into silver.
• SA-1 and SA-2 were used as coating aids, and H-1 and H-3 as hardeners.
• an aqueous solution containing ammonia and silver nitrate and an aqueous solution containing potassium bromide and sodium chloride (molar ratio of KBr to NaCl was 95:5) were simultaneously added thereto by the control double jet method, so that a cubic silver bromide emulsion having an average grain size of 0.45 ⁇ m was prepared.
• pH and pAg were controlled to give a cubic grain shape.
• the grain sizes and core sizes of the silver halide grains used were as follows:
• a sample of the invention was prepared in the same manner as in the foregoing color photographic light-sensitive material, except that exemplified compounds I-1 and II-9 were employed in the 5th and 8th layers instead of UV-5 and UV-6 used in the above 5th and 8th layers.
• Example 8 The two samples processed as above were evaluated as in Example 8.
• the sample with a specific combination of UV absorbents according to the invention did not cause coating troubles and provided images having a light fastness higher than those of the sample using UV-1 and UV-2.

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