EP0502508A1
Expired / Lapsed
EP
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Diffusion transfer color photographic material and heat-developable color photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1992-03-04
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Granted: —
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Expires: 2012-03-04
Abstract
Abstract Disclosed is a diffusion transfer color photographic material having at least a light-sensitive silver halide, a binder, a non-diffusive dye donor compound capable of releasing or forming a diffusive dye in correspondence or reverse correspondence with the reaction of reducing the silver halide to silver, and a non-diffusive filter dye, on a support, in which the filter dye is in the form of an emulsified dispersion along with the dye donor compound. The color separability of the processed material is good and the discrimination of the formed image is also good. The raw film of the material is free from lowering of the filter effect after storage. Also disclosed is a heat-developable color photographic material having at least two layers of a light-sensitive layer B having a peak of color sensitivity to a light of from 720 to 780 nm and a light-sensitive layer A having a peak of color sensitivity to a light of from 790 to 860 nm, on a support, in which the maximum sensitivity of the light-sensitive layer B is the same as or lower than the maximum sensitivity of the light-sensitive layer A. The material has excellent time-dependent raw film storage stability. It may be developed with little temperature dependence and water amount dependence to give an image of high sharpness.
Inventors
- 👤 Toshiki Taguchi
- 👤 Hiroyuki Ozaki
- 👤 Takuya Yokokawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:49
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C1/49854; G03C8/40; G03C8/4013; G03C8/404; G03C8/408; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C7/00; G03C7/30; G03C7/3029; G03C2007/3034; G03C2200/00; G03C2200/23; G03C5/00; G03C5/16; G03C5/164; Y; Y10; Y10S; Y10S430/00; Y10S430/145
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
A diffusion transfer color photographic material comprising a light-sensitive silver halide emulsion, a binder, a non-diffusive dye donor compound capable of releasing or forming a diffusive dye in correspondence or reverse correspondence with reduction of silver halide to silver, and a non-diffusive filter dye, on a support, in which the filter dye is added in the form of an emulsified dispersion together with the dye donor compound.
Claim 2
Dependent Claim
29 words
A diffusion transfer color photographic material as in claim 1, wherein the emulsified dispersion containing the filter dye is present in the layer containing the light-sensitive silver halide emulsion.
Claim 3
Dependent Claim
54 words
A diffusion transfer color photographic material as in claim 1, wherein the total dry thickness of the layers coated on the side of the support on which the silver halide emulsion is provided is 15 µm or less, the photographic material is developed by heat-development, and the processing temperature is from 50°C to 250°C.
Claim 4
Dependent Claim
79 words
A heat-developable diffusion transfer color photographic material comprising at least two layers of a light-sensitive layer B having a color sensitivity peak to light in a range from 720 to 780 nm and a light-sensitive layer A having a color sensitivity peak to light in a range from 790 to 860 nm, on a support, in which the maximum sensitivity of the light-sensitive layer B is same as or lower than the maximum sensitivity of the light-sensitive layer A.
Claim 5
Dependent Claim
166 words
The heat-developable diffusion transfer color photographic material as in claim 4, wherein the silver halide emulsion sensitive to the longest wavelength range is spectrally sensitized with a sensitizing dye represented by formula (I): where Z₁ and Z₂ each represent an atomic group necessary for forming a 5-membered or 6-membered nitrogen-containing heterocyclic group; L₁, L₂, L₃, L₄, L₅, L₆, L₇, L₈, L₉, L₁₀ and L₁₁ each independently represents a methine group or a substituted methine group, provided that either one group of L₂ and L₄, and L₃ and L₅ is bonded to each other via a group, Q₁ or Q₂ to form a ring; Q₁ and Q₂ each represent an atomic group capable of forming a 5-, 6- or 7-membered ring; R₁ and R₂ each represent an alkyl group, and may be the same or different; n₁ and n₂ each represent 0 or 1; M represents a pair ion for neutralizing the charge of the compound; and m represents a number necessary for neutralizing the intramolecular charge.
Claim 6
Dependent Claim
42 words
A heat-developable diffusion transfer color photographic material as in claim 4, wherein the support is paper and has no anti-halation layer and the light-sensitive layer A contains a filter dye capable of absorbing light in the range from 720 to 780 nm.
Claim 7
Dependent Claim
33 words
A heat-developable diffusion transfer color photographic material as in claim 4, wherein a combination of at least three silver halide emulsion layers, each having a light-sensitivity in a different spectral region is used.
Claim 8
Dependent Claim
30 words
A heat-developable diffusion transfer color photographic material as in claim 4, wherein a combination of three layers of a blue-sensitive layer, a green-sensitive layer and a red-sensitive layer is used.
Claim 9
Dependent Claim
26 words
A heat-developable diffusion transfer color photographic material as in claim 4, wherein the layers each have two or more plural layers having a different sensitivity degree.
Claim 10
Dependent Claim
36 words
A diffusion transfer color photographic material as in claim 1, wherein the silver halide emulsion is a core/shell emulsion in which the inside phase and the surface phase of each grain are different from each other.
Claim 11
Dependent Claim
23 words
A diffusion transfer color photographic material as in claim 1, wherein the grain size of the emulsion is from 0.1 to 2 µm.
Claim 12
Dependent Claim
20 words
A diffusion transfer color photographic material as in claim 1, wherein the grain size is from 0.2 to 0.5 µm.
Claim 13
Dependent Claim
124 words
A diffusion transfer color photographic material as in claim 1, wherein the non-diffusive dye doner compound is represented by formula (LI): (Dye-Y) n -Z (LI) wherein Dye representd a dye group or dye precursor group whose wavelength has been shortened temporarily; Y represents a chemical bond or a linking group; Z represents a group which either causes an imagewise differential in the diffusibility of the compound (Dye-Y) n -Z in correspondence or reverse correspondence with a light-sensitive silver salt carrying a latent image or release Dye and causes differential diffusibility between the released Dye (Dye-Y) n -Z; n represents 1 or 2 and when n is equal to 2; and the two Dye-Y groups may be the same as or different from each other.
Claim 14
Dependent Claim
15 words
A diffusion transfer color photographic material as in claim 1, wherein the binder is hydrophilic.
Claim 15
Dependent Claim
21 words
A diffusion transfer color photographic material as in claim 1, wherein the binder is selected from transparent or semi-transparent hydrophilic binders.
References Cited (Backward Citations)
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