USH1594HExpiredUtilityPatentIndex 61
Silver halide color photographic light-sensitive material
Est. expiryOct 6, 2012(expired)· nominal 20-yr term from priority
G03C 1/0051G03C 7/3022
61
PatentIndex Score
3
Cited by
6
References
7
Claims
Abstract
A silver halide color photographic light-sensitive material is provided, wherein at least one spectral-sensitive layer comprises two or more silver Halide emulsion layers each containing monodispersed silver halide grains having two parallel twin planes and an aspect ratio of 3 or less, having development starting points localized at specific sites on the grain surface or in the vicinity thereof.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A silver halide color photographic light-sensitive material comprising a support having thereon a red-sensitive layer, a green-sensitive layer and a blue-sensitive layer, at least one of which layers comprises two or more silver halide emulsion layers different in sensitivity from each other, wherein said two or more silver halide emulsion layers each contain a silver halide emulsion meeting the following requirements (i), (ii) and (iii): (i) a monodispersed emulsion (ii) an emulsion containing silver halide grains having two parallel twin planes and an average aspect ratio of less than 3.0 (iii) an emulsion containing silver halide grains having a developing starting point, at least 70% of total development starting points of the grains locating at the intersection of a line formed by a twin plane exposed to the grain surface and an edge of the grain, or in the vicinity of the intersection.
2. The color photographic material of claim 1, wherein said monodispersed emulsion has a coefficient of variation of 20%.
3. The color photographic material of claim 1, wherein in (iii), said development starting points locate on the grain surface included within a sphere whose radius is 1/3 of the grain thickness and whose center is the intersection.
4. The color photographic material of claim 1, wherein said silver halide emulsion meeting requirements (i), (ii), and (iii) is formed in the presence of an oxidizing agent.
5. The color photographic material of claim 4, wherein said oxidizing agent is iodine.
6. The color photographic material of claim 1 wherein silver halide grains contained in the emulsion meeting requirements (ii) and (iii) comprise at least two layers having different silver iodide contents, an inner layer containing a maximum silver iodide content.
7. The color photographic material of claim 6, wherein the outermost layer of the grains is formed by supplying a silver halide fine grain emulsion.Cited by (0)
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