Silver halide photosensitive material

A photosensitive material, silver halide technology, applied in photosensitive materials, application of photosensitive materials, optics, etc., can solve problems such as reduction of sensitivity and deterioration of particle size

Inactive Publication Date: 2005-07-20
KONICA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the techniques disclosed therein do not adequately compensate for the loss of sensitivity and deterioration of grain size that accompanies the reduction in silver coverage

Method used

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  • Silver halide photosensitive material
  • Silver halide photosensitive material
  • Silver halide photosensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] On the negative film support coated with triacetylcellulose, the following layers having the composition shown below were formed to prepare a multilayer color photographic photosensitive material sample 101. Unless otherwise stated, the amount of each compound added is in g / m 2 To represent. The amount of silver halide or colloidal silver is converted to the amount of silver, and the amount of sensitized dye (indicated by "SD") is expressed in mol / Ag mol.

[0079] Layer 1: Anti-vignetting layer

[0080] Black Colloidal Silver 0.20

[0081] UV-1 0.30

[0082] CM-1 0.040

[0083] OIL-1 0.167

[0084] Gelatin 1.33

[0085] Layer 2: Middle Layer

[0086] CM-1 0.10

[0087] OIL-1 0.06

[0088] Gelatin 0.67

[0089] Layer 3: Low speed red sensitive layer

[0090] Silver iodobromide emulsion a 0.298

[0091] Silver iodobromide emulsion b 0.160

[0092] SD-1 2.4×10 -5

[0093] SD-2 9.6×10 -5

[0094] SD-3 2.0×10 -4

[0095] SD-4 8.9×10 -5

[0096] SD-5 9.2×...

Embodiment 2

[0425] Sample 201 was prepared in accordance with sample 103 of JP-A 2000-89420.

[0426] Sample 202 was prepared similarly to sample 201, except that silver iodobromide emulsion c for the fifth layer, silver iodobromide emulsion e for the ninth layer, and Layer 12 silver iodobromide emulsion h. Sample 203 was prepared similarly to Sample 201 except that the iodide content of the silver iodobromide emulsion newly introduced into Sample 2 was changed to 2.0 mol%.

[0427] For each of Samples 201 to 203, the silver halide development rate upon exposure to neutral white light (N) or split exposure (D) was determined. In addition, as in Example 1, each sample was evaluated for graininess and radiation resistance.

[0428] The results are shown in Table 4.

[0429] Developing rate(N)

[0430] Apparently, the samples of the present invention have excellent granularity and enhanced radiation resistance.

Embodiment 3

[0432] Samples 301 and 302 were prepared in the same manner as sample 101 of Example 1 and sample 201 of Example 2. Each sample thus prepared was evaluated. Samples 301 and 302 were measured for color developer oxidation product utilization, coupler dye formation and ISO speed when exposed to neutral white light. Furthermore, similarly to Example 1 and Example 2, each sample was evaluated for dry layer thickness, graininess, and radiation resistance.

[0433] The results are shown in Table 5.

[0434] use factor

[0435] As is evident from this table, the samples of the present invention have excellent graininess and enhanced radiation resistance.

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Abstract

A silver halide photographic material is disclosed comprising a blue-sensitive silver halide unit containing a yellow coupler, a green-sensitive silver halide unit containing a magenta coupler, and a red-sensitive silver halide unit containing a cyan coupler, wherein a coefficient of utilization of an oxidation product of a color developing agent in a maximum density area of the blue-sensitive unit is not less than 80%, that of the green-sensitive unit is 30 to 75% and that of the red-sensitive unit is not less than 80%.

Description

field of invention [0001] This invention relates to colored silver halide photographic light-sensitive materials, and methods of forming color images using the same. The silver halide photographic photosensitive material has enhanced sensitivity sufficient to record images and an excellent grain size. Background of the invention [0002] Recently, silver halide photographic photosensitive materials and systems using the same have been developed, enabling anyone to easily obtain high-quality color images. [0003] On the other hand, a so-called digital still camera using a CCD as an imaging element is also rapidly developing. In order to obtain an image quality close to that of silver halide photography, cameras equipped with CCD elements and having several megapixels have entered the consumer market for amateur use. Digital still cameras can directly obtain digitized image data without any steps of developing and exposing photographic film. For exam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03C7/20G03B27/32G03C1/035G03C1/74G03C5/08G03C7/18G03C7/30
CPCG03C7/3041G03C7/3022G03C2007/3025G03C2007/3027
Inventor 深泽文荣伊藤司
Owner KONICA CORP
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