Silver halide emulsion and silver halide photography photosensitive material

Abstract

The present invention provides a silver halide emulsion capable of obtaining hard-tone gradation with high sensitivity without causing desensitization and softening even by digital exposure such as laser scanning exposure, and a silver halide photographic photosensitive material using the same. Furthermore, there is provided a silver halide emulsion with high sensitivity, low fog, excellent reciprocity law characteristics under high illuminance, and little change in sensitivity change and gray scale change with time to post-exposure treatment. The silver halide emulsion is formed of silver halide grains having a silver chloride content of at least 90 mol%, and is characterized in that the silver halide grains are at least one of the following 1) and 2). 1) The silver bromide-containing phase and the silver iodide-containing phase form layers respectively. 2) The maximum silver iodide content in the corner portion is higher than the silver iodide content in the main surface portion of the particle.

Description

Technical field [0001] The present invention relates to a silver halide emulsion and a silver halide photographic photosensitive material. In detail, it relates to a silver halide emulsion capable of obtaining a hard-tone gray scale with high sensitivity in digital exposure like laser scanning exposure, and a silver halide emulsion using the silver halide emulsion Photographic photosensitive materials. Furthermore, it relates to a silver halide emulsion that has high sensitivity but not excessive sensitivity, excellent reciprocity law characteristics under high illuminance, and small changes in sensitivity and gray scale changes over time until the post-exposure process, and its manufacturing method and Use its silver halide color photographic photosensitive material. Background technique [0002] In recent years, in the field of color printing using color printing paper, the penetration of digitization has been amazing. For example, the digital exposure method using laser scanni...

AI Technical Summary

Problems solved by technology

In the above-cited patents, there is no iodide-containing layer on the surface, or because it is limited to the corner part, the effect of high sensitivity cannot be induced to the maximum extent.

On the other hand, when the iodide ion is contained on the outermost surface of the particle, after the particle is formed, the iodide ion adsorbed on the outermost surface forms an unstable component in the subsequent chemical sensitization and other treatments and enters into the silver chloride. In the layer, it is easy to form image blur, which is not suitable for high sensitivity

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