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
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
  • G03C5/29—Development processes or agents therefor
  • G03C5/305—Additives other than developers
• • 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

Definitions

• FIELD OF THE INVENTION This invention relates to a color photographic developing method and a developer therefor and, more particularly, it relates to a method for developing a silver halide color photographic material with a developer containing 4-amino-3-methyl-N-ethyl-N-([3- methanesulfonamidoethyl)aniline sesquisulfate monohydrate (hereinafter referred to as a developing agent) and a crystallization preventing agent for an amine base of the developing agent.
• a developing agent 4-amino-3-methyl-N-ethyl-N-([3- methanesulfonamidoethyl)aniline sesquisulfate monohydrate
• An object of the present invention is therefore to provide a color developing method without accompanying with the crystallization of the developing agent.
• Another object of the present invention is to provide a color photographic developer of which the crystallization is prevented.
• crystallization-preventing agents must have an appropriate solubility in photographic developer solution and must not adversely effect the photographic properties of the color photographic materials to be developed.
• lactose and hydroxy propylmethyl cellulose are preferable crystallizationpreventing agents because they satisfy the above requirements.
• hydroxylpropylmethyl cellulose used in the present invention has less tendency to be salted out in the developer solution than methyl cellulose described in the specification of Japapese Patent Publication No. 41,476/71. That is, while the addition of methyl cellulose in an amount of more than 0.7 percent by weight based on the developing agent to the developer solution increases the crystallizationpreventing effect, methyl cellulose per se is salted out to produce the precipitate thereof.
• hydroxypropylmethyl cellulose is not salted out even it if is added in an amount of 1 percent by weight based on the developing agent.
• the crystallization-preventing agent of the invention can be incorporated in the powder form into the developing agent in the form of powder, particle or granule, or can be incorporated as a powder form or an aqueous solution into the developer solution at any stage, for example, in preparing the developer solution or after the developer solution has been prepared for use.
• the amount of the crystallization-preventing agent can range from 0.1 to 1.0 percent by weight, preferably from 0.4 to 1.0 percent by weight based on the developing agent.
• a photographic developer solution of the present invention may contain conventional photographic additives such as preservatives, development-promoting agents, development inhibitors, antifoggants or alkalis.
• EXAMPLE 1 A sensitometric exposure using a sensitometer was applied to a multiple-layer color negative film containing an anti-diffusion color coupler.
• DEVELOPER A Anhydrous Sodium Sulfite 2.0 g Developing Agent 5.0 g Sodium Carbonate (monohydrate) 50 g Potassium Bromide 2.0 g Sodium Hydroxide L0 g Water was added to make 1.0 l of solution DEVELOPER B The same composition as Developer A was employed except 1.0 percent by weight of lactose based on the developing agent was additionally added.
• DEVELOPER C The same composition as Developer A was employed except l.0 percent by weight of hydroxypropylmethyl cellulose based on the developing agent was additionally added.
• EXAMPLE 2 A developer solution was prepared employing the same kind of developing agent used in Example I in accordance with the following formulation. In the course of the preparation of the developer solution, lactose and/or hydroxypropylmethyl cellulose was added in several different quantities, respectively. Each of the resulting developer solutions was settled at a tempera ture of from 15 to 16C.
• Crystallization Preventing Agent Lactose 0.03 7 g-0.065 g or Hydroxypropylmethyl Cellulose 0.0065 g Developing Agent 6.5 g Sodium Carbonate (Monohydrate) 60 g Potassium Bromide 2.0 g Sodium Hydroxide 1.0 g Water was added to make 1.0 l of solution (1) Commercially available lactose according to the pharmacopoeia of the amount of the developing agent was employed.
• the developing agent was prepared through decoloration with activated charcoal and recrystallization in a dilute sulfuric acid methanol from which the developing agent could be easily salted out.
• a color photographic developing method of silver halide color photographic materials by developing said materials with a developer solution containing 4- amino-3-methyl-N-ethyl-N-(B-methanesulfonamidoethyl)aniline sesquisulfate monohydrate as a developing agent, the improvement which comprises preventing the crystallization of the developing agent in the developer solution by incorporating at least one crystallization-preventing agent selected from the group consisting of lactose and hydroxypropylmethyl cellulose into the developer solution.
• a color developer solution comprising 4-amino-3- methyl-N-ethyl-N-(B-methanesulfonamidoethyl)aniline sesquisulfate monohydrate as a developing agent and at least one crystallization-preventing agent selected from the group consisting of lactose and hydroxypropylmethyl cellulose.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=13229096

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (2)

Citations (5)

• 1971
  • 1971-08-20 JP JP46063432A patent/JPS5021250B2/ja not_active Expired
• 1972
  • 1972-08-16 GB GB3829072A patent/GB1336421A/en not_active Expired
  • 1972-08-18 FR FR7229550A patent/FR2150358B1/fr not_active Expired
  • 1972-08-18 US US00281673A patent/US3779767A/en not_active Expired - Lifetime
  • 1972-08-21 DE DE2240983A patent/DE2240983A1/de active Pending

Patent Citations (5)

Non-Patent Citations (1)

Also Published As

Similar Documents