Multilayer color photographic materials
AssigneeFuji Photo Film Co., Ltd.
InventorsYoshisato Minagawa, Naoki Arai, Takehiko Ueda
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AssigneeFuji Photo Film Co., Ltd.
InventorsYoshisato Minagawa, Naoki Arai, Takehiko Ueda
Estimating the term…
In a multilayer color photographic material essentially comprising a support having coated thereon, in succession, a red-sensitive silver halide emulsion layer and a green-sensitive silver halide emulsion layer, with an optional yellow filter layer and a blue-sensitive silver halide emulsion layer, by disposing a non-sensitive auxiliary layer containing a non-diffusible colored coupling compound which releases a diffusible dye at color development capable of being removed from the photographic layer at development, an effective masking can be applied to the side absorption of cyan dye image without reducing the sensitivity of the red-sensitive silver halide emulsion layer during storage before or after exposure. The red-sensitive silver halide emulsion layer may optionally be composed of two or more layers having different sensitivities, whereby the non-diffusible colored coupling compound can be incorporated into at least one layer selected from the non-sensitive auxiliary layer and a red-sensitive silver halide emulsion layer having high sensitivity. The non-diffusible colored coupling compound can be present in the following locations: (1) in a non-photosensitive layer which contains no photosensitive silver halide grains disposed under a red-sensitive emulsion layer and in contact therewith on a support; (2) in the most sensitive layer of two or more red-sensitive emulsion layers having different sensitivities; (3) in a non-photosensitive layer containing no light-sensitive silver halide grains disposed between a red-sensitive emulsion layer and a green-sensitive emulsion layer. In addition to being present in any one of (1), (2) and (3) above, the colored coupling compound can also be present in the layers of (1) plus (2), (1) plus (3), (2) plus (3) or (1) plus (2) plus (3).
A multilayer color photographic material wherein green-red color mixing is effectively masked by a non-diffusible colored coupling compound which has a maximum absorption in the wavelength region of about 500 m.mu. to about 600 m.mu., which is red before coupling and froms a cyan dye after coupling and provides a low decrease in sensitivity during storage of the photographic material, which photographic material comprises a support having coated thereon one or more red-sensitive silver halide emulsion layers containing a colorless cyan coupler, which, when two or more red-sensitive layers are used, differ in sensitivity, and a green-sensitive silver halide emulsion containing a colorless magenta coupler, said color photographic material having at least one layer having incorporated therein said non-diffusible colored coupling compound so that the optical density of a layer in which the colored coupling compound is present is about 0.05 to about 1.0, which releases upon coupling with the oxidation product of a primary aromatic amino color developing agent a duffusible dye capable of being removed from the photographic layer, said diffusible dye compensating for the green side absorption of the cyan dye, said layer being (1) a non-light-sensitive auxiliary layer disposed between the red-sensitive silver halide emulsion layer and the support;
A method of effectively masking green-red color mixing in a multi color photographic material by a non-diffusible colored coupling compound which has a maximum absorption in the wavelength region of about 500 m.mu. to about 600 m.mu., which is red before coupling and forms a cyan dye after coupling and provides a low decrease in sensitivity during storage of the photographic material, which is exposed and developed, said photographic material comprising a support having coated thereon one or more red-sensitive silver halide emulsion layers containing a colorless cyan coupler, which, when two or more red-sensitive layers are used, differ in sensitivity, and a green-sensitive silver halide emulsion layer containing a colorless magenta coupler, which method comprises coating on said support at least one layer having incorporated therein said non-diffusible colored coupling compound so that the optical density of the layer in which the colored coupling compound is present is about 0.05 to about 1.0, which releases upon coupling, during development, with the oxidation product of a primary aromatic amino color developing agent a diffusible dye which is removed from the photographic layer, said diffusible dye compensating for the green side absorption of the cyan dye, said layer being (1) a non-light-sensitive auxiliary layer disposed between the red-sensitive silver halide emulsion layer and the support;
Dependencies are inferred from the claim text.