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
  • G03C1/00—Photosensitive materials
  • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
  • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
  • G03C1/835—Macromolecular substances therefor, e.g. mordants

Definitions

• This invention relates to a photographic silver halide light-sensitive material having a layer containing a dyestuflf resistant to difiusion for preventing the formation of halation.
• the material for absorbing the eflfective light has been diffused from the intermediate layer into the light-sensitive layer. This reduces the sensitivity and gradation of the lightsensitive layer. Also, if the material has not been diffused out of the intermediate layer, it remains in the layer after developing fixing and water-washing have been completed. This results in darkening of the formed image. Further, the second method can be used for only a limited use since the absorbing material remains, in general, in the support after processing.
• the absorbing material is not present in the light-sensitive layer by diffusion before exposure and the material will be removed from the intermediate layer by diffusion or decolored by a chemical action at development after exposure.
• the use of a colloidal silver particle has been proposed but while it is used effectively for color photographic materials, it cannot be effectively used for black and white photo- 3,445,231 Patented May 20, 1969 "ice graphic materials.
• the use of dyestuffs instead of the use of colloidal silver is desirable.
• a silver halide photographic emulsion layer can be used and particularly a photographic silver halide emulsion sensitized optically and having a high resolving power can be profitably used.
• the anti-halation layer of this invention is applied to thus treated film and on the anti-halation layer is applied a silver halide photographic emulsion layer and, if necessary, a protective layer.
• a paper may be used as the support.
• the anti-halation layer may contain various surface active agents, such as sap'onin, sodium alkylbenzene sulfonate, polyoxyethylene alkylphenyl ether and the like.
• a stabilizer for photographic emulsion such as 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene, etc., may be added in the anti-halation layer of this invention to increase the photographic properties of the emulsion layer.
• a low-sensitive photographic silver halide emulsion may be dispersed in the anti-halation layer of this invention to improve the gradation of the lightsensitive material.
• the anti-halation layer in this invention may be used as the intermediate layers for each light-sensitive layer of a multi-layer color photographic material to prevent the formation of halation in the upper layers and at the same time to suppress undesirable optically sensitive areas in the lower layers.
• a suitable amount of dyestuff used in this invention is 1 to 20 g. per g. of dried gelatin and that of the polymer is 2 to 40 g. per 100g. of dried gelatin.
• Typical examples of the dyestufis used in this invention are as follows:
• dyes of this invention shall not be limited to these compounds, but may be ones containing acid groups, such as a' sulfonate group and carboxylate group, which are decolored during processing.
• Synthesis 2 Into 700 ml. of water were dissolved 200 g. of 2-methyl-1-vinylimidazole and 1 g. of sodium bisulfate and then a solution of l g. of potassium persulfate in 100 ml. of water was added into the solution with stirring in a nitrogen stream. The mixture was stirred for 4 hours at 35 C., subjected to dialysis in a water stream for one night, and dried by freezing to provide 190 g. of poly-2- methyl-l-vinylimidazole.
• Synthesis 3 Into 70 ml. of water were dissolved 31 g. of 2-methyl-l-vinylimidazole, 9 g. of acrylamide and 0.2 g. of potassium persulfate, and after adding a solution of 0.2 g. of sodium bisulfate in 10 ml. of water, the mixture was stirred from 3 hours at 40 C. in a nitrogen stream. The solution was subjected to dialysis in a water stream for one night and then to drying by freezing to provide 35 g. of the copolymer.
• Synthesis 4 Into an aqueous solution of 35% isopropyl alcohol were dissolved 66.2 g. of 2-methyl-lvinylimidazole and 33.8 g. of N-ethoxymethyl acrylamide to make the whole volume 500 ml. and after the addition of 2 ml. of 30% hydrogen peroxide solution and 0.5 g. of L-ascorbic acid, the mixture was stirred for 5 hours at 40 C. in a nitrogen stream. The solution was subjected to dialysis in a water stream for one night and dried by freezing to provide 85 g. of the copolymer.
• Synthesis 5 Into ml. of water were dissolved 25.5 g. of 2-methyl-l-vinylimidazole, 14.5 g. of acryloylmorpholine, and 0.2 g. of potassium persulfate and, after the addition of a solution of 0.2 g. of sodium persulfate in 10 ml. of water, the mixture 'was stirred for 4 hours at 40 C. in a nitrogen stream. The solution was subjected to dialysis for one night in a water stream and dried by freezing to give 27 g. of the copolymer.
• Synthesis 6 Into 150 ml. of water were dissolved 28 g. of 2-methyl-1-vinylimidazole, 12 g. of l-vinylpyrrolidone and 0.2 g. of potassium persulfate and, after the addition of a solution of 0.2 g. of sodium bisulfate in ml. of water, the mixture was stirred for 4 hours at 40 C. in a nitrogen stream. The solution was subjected to dialysis for one night and dried by freezing to provide 30 g. of the copolymer.
• Synthesis 7 Into 150 ml. of water were dissolved 29 g. of 2-methyl-l-vinylimidazole, 11 g. of N-methylol acrylamide, and 0.2 g. of ammonium persulfate and after the addition of a solution of 0.2 g. of sodium bisulfate in 10 ml. of water, the mixture was stirred for 2 hours at 40 C. in a nitrogen stream. The solution was subjected to dialysis for one night in a water stream and dried by freezing to provide 30 g. of the copolymer.
• Example 1 Into 50 ml. of an aqueous solution containing 5 g. of gelatin, 0.1 g. of saponin, and 0.1 g. of mucochloric acid was added 8 ml. of a 5% aqueous solution of the polymer obtained in Synthesis 1 and then were added the 2% aqueous solutions of Dyestufis 1, 4, and 6 in an amount of 10 ml. each. After adjusting the pH of the solution to 6.5 with the addition of sodium carbonate, the solution was added with water up to 100 ml. (Sample A.)
• Each of the above-prepared solutions was applied to a film base of triacetyl cellulose having a colorless under coating in a dried thickness of 2 microns.
• a fine silver bromo-chloride particle emulsion containing 40 mol percent of silver chloride optically sensitized into panchromatic state and gelatin in an amount of 120 g. per 1 mol of the silver halide was applied onto the layer in a dried thickness of 2 microns, and on thus formed layer was further applied a protective layer consisting of gelatin and a hardening agent in a dried thickness of 1 micron.
• Example 2 The same procedure was repeated using 11 ml. of a 5% aqueous solution of the polymer prepared in Synthesis 3 instead of the polymer in Example 1 and using 10 ml. each of the 2% aqueous solutions of Dyestuffs 2, 4, and 8. Almost in the same results as in Example 1 were obtained.
• Example 3 The same procedure as in Example 1 was repeated using 15 ml. of a 5% aqueous solution of the polymer prepared in Synthesis 6 instead of using the polymer in Example 1 and using 10 ml., 8 ml., and 10 ml. each of the 2% aqueous solutions of Dyestuffs 2, 5, and 8 respectively. Almost the same results as in Example 1 were obtained.
• Example 4 A coating solution was prepared as in Example 1 using 3 ml. of an 0.1% aqueous solution of Dyestuif 9 instead of the aqueous solutions of Dyestuffs l, 4, and 6 in Example l and the coating solution was applied to a redsensitive layer of a multi-layer type color photographic element in a dried thickness of 1 micron. On the thus formed layer were applied a green-sensitive layer, a yellow colloidal silver layer, blue-sensitive layer and then a protective layer.
• a Sample A and a Sample B were prepared respectively by applying a coating solution Dyestutf 9 but containing no polymer on the red-sensitive layer of the color photographic element and by applying a coating solution containing neither Dyestutf 9 nor polymer on the red-sensitive layer.
• these samples and the above prepared light-sensitive material of this invention were treated by a standard color-reversal treatment, the color residue of the dyestulf was not observed in each sample.
• the undesirable green-sensitivity of the red-sensitive layer of the light-sensitive material of this invention was reduced to 50% as compared with that of Sample B while the green-sensitivity of the red-sensitive layer of the lightsensitive material was reduced to only 20%. Further, it was found that the red-sensitive layer and the greensensitive layer of Sample A were reduced into 50% in green-sensitivity as compared with Sample B.
• a silver halide light-sensitive material comprising a support, at least one silver halide emulsion layer and an anti-halation layer, said anti-halation layer consisting of a hydrophilic colloid layer having incorporated therein (1) a polymer containing more than 50% of 2-methyl-1- vinylimidazole polymerized therein and (2) a dyestuif having a salt of an acid group.
• said dyestufi is one having the formula:
• the silver halide light-sensitive material as claimed figg i IS an mtermedlate layer for each hght sensmve claim 1 Wherem Sald dyesmfi Is one havmg the 14.

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• Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• General Physics & Mathematics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

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Cited By (10)

Citations (1)

• 1966
  • 1966-03-17 BE BE677997D patent/BE677997A/xx unknown
  • 1966-03-18 US US535315A patent/US3445231A/en not_active Expired - Lifetime
  • 1966-03-23 DE DE1966F0048745 patent/DE1547836B2/de active Granted

Patent Citations (1)

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