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
  • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
  • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
  • G03C1/42—Developers or their precursors
• • 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
  • G03C7/407—Development processes or agents therefor
  • G03C7/413—Developers
  • G03C7/4136—Developers p-Phenylenediamine or derivatives thereof

Definitions

• This invention relates to photographic materials and more particularly to light-sensitive photographic materials containing developers.
• the photographic materials are passed through a tank containing the developer insolution.
• the concentration of the developer falls so that the processing conditions vary and it is eventually necessary to add new developer to the tank.
• the developer solution has to ditluse through the upper layers of the photographic materials before it can reach the lower layers so that an' even development of the various layers cannot'be achieved.
• correct development of the bottom layer can only be obtained by having a high concentration of developer in the developer solution, but under these conditions there is a tendency forthe top layer to be over-developed.
• a light sensitive gelatino-silver halide emulsion layer which contains a substituted phthalimide of the formula R1 C i 1 RI ⁇ C O J wherein R and R are substituted or unsubstituted alkyl radicals or R and R may be joined together or each or both joined to the benzene ring to form with the nitrogen atom a heterocyclic ring, X is hydrogen, an alkyl, substituted alkyl, alkyloxy, substituted alkyloxy, amino or substituted amino radical, and Y is a solubilising group, and wherein the benzene nuclei may carry substituents.
• the solubilising group may be for example a carboxylic or sulphonic acid group or a salt of one of these, for example an alkali metal or ammonium salt.
• the substitutedphthalimidea may- :be made-iby.1-.-heating.-.
• R R and X have the meaning given above and thephenyl nucleus may carry further.substituents,,with1: phthalic anhydride or a substituted phthalic anhydrideg.. and, where both the amine and; phthalicranhydride-are groups, further treatingthe free from water solubilising product to introduce a water solubilisinggroupr
• the gelatinosilver halideiemulsion nlayer also contains a ,colour coupler.
• the emulsions vused .for forming -the-layers ofounirb; vention may be made by simply.,mixing;an- .aqueousisolu tion or dispersion of the substituted phthalim de with a normal gelatino-silver halide emulsiqn prepared in thre known manner and if desiredadding one. onmore sen-1:
• halide emulsion layer containing a substituted phthalimide as hereinbefore-- defined forms a further feature of our invention.
• Photographic materials containing the light-sensitive emulsion layers of our invention may be exposed to light in the normal way and then developed with an alkaline solution containing hydroxylamine or hydrazine and this process of development forms a further feature of our invention. If desired other adjuvants for example sodium sulphite and potassium bromide may be added to the developer solution. The material may then be fixed and, when the emulsion layer contains a colour coupler, the developed silver may be bleached.
• Example parts of a gelatin-silver iodo-bromide emulsion containing 7.25% of gelatine, 3.35% of silver bromide and 0.05 of silver iodide are stirred and there are added 3 parts of a 0.05% solution in methanol of bis (3 ethyl 5 phenyl benzoxazole 2-) 9-ethy1trimethineyanine iodide (the iodide of the green sensitising dyestuit Rl340 described in B.I.O.S. Final Report No. 1355, page 86).
• the mixture is stirred at 40 C.
• the paper is washed and then transferred to a stop bath of the following composition:
• the paper is washed and the developed silver is bleached and fixed in a solution of the following composition:
• the paper is finally washed and dried.
• a light sensitive gelatino-silver halide emulsion which contains a substituted phthalimide of the formula:
• R and R are alkyl radicals
• X is selected from the group consisting of alkyl, alkoxy and amino
• Y is a solubilising group selected from the class consisting of sulphonic and carboxylic acid groups.
• a light sensitive gelatino-silver halide emulsion ac cording to claim 1 which contains, in addition to the substituted phthalimide as defined in claim 1, a colour coupler capable of coupling with the oxidation product of a primary aromatic amino developer to form a dye.
• a photographic material comprising a plurality of layers coated on a support, at least one of said layers being a light sensitive gelatino-silver halide emulsion layer which contains a substituted phthalimide of the formula:
• R and R are alkyl radicals
• X is selected from the group consisting of alkyl, alkoxy and amino
• Y is a solubilising group selected from the class consisting of sulphonic and carboxylic acid groups, and which further contains a colour coupler capable of coupling with the oxidation product of a primary aromatic amino developer to form a dye.
• a 'colour photographic process which comprises imagewise exposing to light a light sensitive gelatino-silver halide emulsion which contains a substituted phthalimide of the formula:
• R and R are allcyl radicals
• X is selected from the group consisting of alltyl, alkoxy and amino
• Y is a solubilising group selected from the class consisting of sulphonic and carboxylic acid groups, and subsequently developing with an alkaline solution of a member of the class consisting of hydroxylamine and hydrazine.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=32396010

Family Applications (1)

Country Status (4)

Cited By (3)

Citations (3)

• 0
  • BE BE552264D patent/BE552264A/xx unknown
• 1956
  • 1956-10-30 US US619137A patent/US2930693A/en not_active Expired - Lifetime
  • 1956-11-01 DE DEI12400A patent/DE1019560B/de active Pending
  • 1956-11-02 FR FR1159499D patent/FR1159499A/fr not_active Expired

Patent Citations (3)

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