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Image production method of silver halide photographic light sensitive material

A photosensitive material and silver halide technology, applied in photosensitive materials, subtractive silver halide emulsion technology, emulsified silver emulsion, etc., can solve the problem of sensitivity reduction

Inactive Publication Date: 2008-02-20
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a countermeasure to improve the processing stability, the hard tone of the emulsion can be mentioned, but the problem of sensitivity reduction occurs along with the hard tone

Method used

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  • Image production method of silver halide photographic light sensitive material
  • Image production method of silver halide photographic light sensitive material
  • Image production method of silver halide photographic light sensitive material

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0547] Synthesis of Example Compound II-2

[0548] At 130°C, 2.56 g of 4-oxo-5-[3-[3-(3-sulfopropyl)-2-(3H)-benzothiazolidinyl]-2-propenylylene Ethyl]2-thiothiazolidin-3-ylacetic acid was mixed with 2.5g of dimethyl sulfate, heated and stirred for 120min. After returning to room temperature, isopropyl ether was added to the viscous reactant, stirred and allowed to stand, and the supernatant liquid was poured off. Add 1g of 4-oxo-2-thiothiazolidin-3-ylacetic acid, then add 10mL of pyridine, heat to reflux steadily for 20min, and then cool to precipitate crystals. The precipitate was filtered and washed with ethanol solvent. The obtained crude crystals were recrystallized from a methanol solvent to obtain 1.0 g of dyestuff example compound II-2. The wavelength with maximum absorption in methanol solution is 644nm.

manufacture example 2

[0549] Synthesis of Exemplary Compound II-4

[0550] At 130°C, 2.48 g of 4-oxo-5-[2-[2-[-3-(2-sulfoethyl)-2-(3H)-benzoxathiazolidinyl]- Ethyl]-butylene]-2-thiothiazolidin-3-ylacetic acid was mixed with 2.5 g of dimethyl sulfate, heated and stirred for 60 min. After returning to room temperature, isopropyl ether was added to the viscous reactant, stirred and allowed to stand, and the supernatant liquid was poured off. Add 1g of 4-oxo-2-thiothiazolidin-3-ylacetic acid, add 10mL of pyridine, then add 1mL of triethylamine, heat to reflux steadily for 20min, then cool to precipitate crystals. The precipitate was filtered and washed with ethanol solvent. The obtained crude crystals were recrystallized from a methanol solvent to obtain 0.8 g of the pigment-exemplified compound II-4. The wavelength with maximum absorption in methanol solution is 611 nm.

Embodiment 1

[0552] In this example, silver halide photographic photosensitive materials satisfying the conditions of the present invention (Samples 3, 4, 6, 9, 10, 12, 14 to 22) and silver halide photographic photosensitive materials of Comparative Examples (Samples 1, 2, 5, 7, 8, 11, 13) and evaluate. After explaining the emulsion used for producing such a silver halide photographic photosensitive material and the production method of non-photosensitive silver halide grains, the production method and evaluation method of the silver halide photographic photosensitive material are described.

[0553] "Preparation of Emulsion A"

[0554] liquid 1

[0555] water 750mL

[0556] Gelatin 20g

[0557] Sodium chloride 3g

[0558] 1,3-Dimethylimidazolidine-2-thione 20mg

[0559] Sodium benzenethiosulfonate 10mg

[0560] Citric acid 0.7g

[0561] liquid 2

[0562] water 300mL

[0563] Silver nitrate 150g

[0564] Liquid 3

[0565]water 300mL

[0566] Sodium chloride 38g

[0567] Potass...

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Abstract

The invention provides a silver halide photographic sensitive material with high luminous sensitivity, wherein the carrying agent contains at least silver halide photographic sensitizing material of the silver halide emulsion coating, which contains silver halide emulsion with more than 40mol% silver bromide of halogens, and in the silver halide, the content of metal complex compound containing cyanide ligand in 1 mol is more than [-6] to the power of 10 mol, in the characteristic curve displayed on Cartesian axis having the equalized unit length of logarithm exposure amount (axial X) and optical concentration (axial Y), when the optical concentration is 0.1-15, the performance curve has the contrast of more than 4.0.

Description

technical field [0001] The present invention relates to an image forming method of a silver halide photosensitive material, in particular to an image forming method of a superhard-tone negative type photosensitive material of a silver halide photosensitive material suitable for use in a photographic plate making process. Background technique [0002] In the photoplate-making process in the field of photographic art, the continuous-tone photographic image is converted into a so-called dot image in which the shade of the image is expressed by the size of the dot area, and this is used as a printing original plate that composes a photographic image with characters and lines. In silver halide photosensitive materials used for this purpose, in order to obtain good reproducibility of characters, lines and halftone dot images, it is required to have a photographic characteristic of ultra-hard tone that clearly distinguishes image parts and non-image parts. [0003] A so-called high...

Claims

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Application Information

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IPC IPC(8): G03C1/09G03C1/12G03C1/08G03C7/26G03C7/30
Inventor 及川德树
Owner FUJIFILM CORP