Patent ID: 6632595
Filing Date: 2003-10-14
Classification: G03C

Abstract:
A silver halide photographic emulsion comprising grains, wherein 50% or more (numerical ratio) of all the grains are occupied by tabular grains each meeting the requirements (i) to (iii) below:(i) a silver iodobromide or silver iodochlorobromide tabular grain having (111) faces as main planes and having two parallel twin planes; (ii) a thickness of 0.12 &mgr;m or less; and (iii) the tabular grains each have a grain fringe portion meeting the following requirements (a) and (b), the grain fringe portion being a grain peripheral portion extending from a grain side defining edge to an inside as much as a length corresponding to a grain thickness, when viewed in a direction perpendicular to the main planes: (a) the grain fringe portion has a phase of high silver iodide content in either one of an upper region and a lower region than a region sandwiched between the two twin planes, and (b) â€œAâ€ , which represents the maximum local silver iodide content (mol %) in the phase of high silver iodide content, satisfies the relationship: Aâˆ’6.0&gE;B, â€ƒwherein â€œBâ€  represents local silver iodide content (mol %) in a part which is positioned on a straight line passing through the part having the maximum local silver iodide content and being perpendicular to the main plane, the part being positioned in the midpoint between the main plane and the twin plane that are opposite, against the region sandwiched between the two twin planes, to the phase of high silver iodide content.