Silver halide color reversal photographic materials

Color reversal photographic material comprises a plurality of silver halide photographic emulsion layers, at least two of which have substantially the same color sensitivity in the visible spectrum, and of such layers of the same color sensitivity: in one layer (a) the AgX grains which provide at le...

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1. Verfasser: SHINGO ISHIMARU
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Sprache:eng
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Zusammenfassung:Color reversal photographic material comprises a plurality of silver halide photographic emulsion layers, at least two of which have substantially the same color sensitivity in the visible spectrum, and of such layers of the same color sensitivity: in one layer (a) the AgX grains which provide at least 50% of the total projected area of all the grains in that layer are tabular AgX grains having an average aspect ratio, i.e. ratio of grain equivalent diameter to thickness, of 5:1 or more, and preferably are internal latent image forming, and another layer (b) has a lower degree of sensitivity than that of layer (a) and contains AgX (e.g. AgBrl) grains each comprising a core and a shell, and at least the surface of each core has been chemically sensitized; the molar ratio of core:shell Ag ion is preferably 1:19 to 99:1, more preferably 1:1 to 19:1 and the equivalent diameter of the core shell grains is 5,0 mu m or less, preferably >3 mu . The material has high sharpness, good graininess and high sensitivity; and can form a color positive image of improved gradation and well stabilized gradation balance by color reversal treatment.