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
  • G03C7/32—Colour coupling substances
  • G03C7/333—Coloured coupling substances, e.g. for the correction of the coloured image
  • G03C7/3335—Coloured coupling substances, e.g. for the correction of the coloured image containing an azo chromophore

Definitions

• n CONH(CHz)xQYRz wherein X is an integer of 0 to 4; Y is an. integer. of 0 or 1; R is a group selected from phenyl groups, alkyl groupshaving six to carbon atoms, alkyl-substituted phenyl groups and alkyl-substituted ph'enoxyphenyl groups; and R is a straight chain or branched-chain alkyl group having one tofour carbon atoms, which are known as automasking cyan couplers.
• R is a lower alkyl group, and R is a branchedchain alkyl group having six or more carbon atoms.
• Protect type cyan-colored couplers which, in view of their natures, are used in negative photographic materials, in general, are desired to have such properties as a high solubility in organic solvents, prominence in automasking effects (broad in width of isosbestic points 'of blue and green portions), favorable color-forming properties andexcellence with respect to graininess of the resulting image, and do not bring about any change in color due to development.
• the compound (A) is a coupler having considerably desirableproperties. It is also well known that naphthol type cyan couplers are lowere in solubility in high boiling solvents by introducing arylazo components therein.
• the present invention is concerned with lightsensitive silver halide, color photographic materials characterized by containing couplers of the general formula,
• n is an integer of l to 4; m is an integer of to 2; R is a phenyl group or an alicyclic group.
• couplers used in the present invention gave favorable results both in their behavior to emulsions and in masking property.
• the thus-synthesized diazo solution was dropped, with stirring and cooling to 0 i 5C. over a period of 30 minutes, in a solution of l 85 g. of l-hydroxy-N-[8-(2,4di-tamylphenoxy)butyl]-2-naphthamide in 2.5 liters of pyridine, and the mixed solution was stirred at below 10 C. for 2 hours. Thereafter, the liquid reaction mixture was poured into 8 liters of water to deposit a red precipitate, which was then'washed with water, dried and recrystallized from 2 liters of ethyl alcohol to ob-' tain 240 g.
• This color photographic material was exposed to red light through an optical wedge, and then developed at 20C. for 10 minutes with a color developer of the following composition:
• the thus treated photographic material was washed with water for 20 to 25 minutes and then dried to obtain a cyan-colored negative image and a red-positive image composed of unreacted residual coupler.
• This positive image had a red color sufficient in density
• the isosbestic points thereof formed masks of 550 mp. .and 440 mu.
• EXAMPLE 2 A mixture comprising 1.0 of the exemplified coupler (1) and 3.0 g. of l-hydroxy-N-[6-(2,4-di-tamylphenoxy)butyl]-2-naphthamide was completely dissolved at 80C. in a mixed solvent comprising 4 ml. of tricresyl phosphate and 8 ml. of butyl acetate. The resulting solution was added to 100 parts of a 10 percent aqueous gelatin solution kept at 60C., incorporated with 2 ml. of a 10 percent aqueous Alkanol B solution, and then dispersed by means of a colloid mill to form a coupler dispersion. The thus-formed coupler dispersion was added to 100" ml. of a red-sensitive high speed silver iodobromide emulsion, which was then treated in the same manner as in Example 1 to prepare a red-sensitive color photographic material.
• Example 2 was repeated, except that di-n-butyl phthalate was used in place of the tricresyl phosphate, to prepare a red-sensitive color photographic material. This photographic material was exposed to red light, and then treated in the same manner as in Example 2 to obtain a cyan-colored negative image simultaneously with an excellent red-positive image.

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=13005135

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Country Status (4)

Cited By (2)

• 1971
  • 1971-07-27 JP JP46055665A patent/JPS5010729B1/ja active Pending
• 1972
  • 1972-07-24 US US00275211A patent/US3811892A/en not_active Expired - Lifetime
  • 1972-07-26 GB GB3499572A patent/GB1397628A/en not_active Expired
  • 1972-07-27 DE DE2236947A patent/DE2236947A1/de active Pending

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