Abstract: Multicolor photographic elements are disclosed containing at least three dye image forming layer units. An enhancement of the speed-granularity relationship of a dye image is obtained when the corresponding dye image forming layer unit contains at least three superimposed silver bromoiodide emulsion layers. The emulsion layer nearest the support containing an average iodide content of up to 60 percent the iodide content of the next overlying of the emulsion layers. The three emulsion layers each differ in speed from the next adjacent of the emulsion layers, with the fastest of the emulsion layers being located nearest the source of exposing radiation and being at least one half stop faster than the next adjacent layer and the slowest of the emulsion layers being located farthest from the source of exposing radiation and being at least one half stop slower than the next adjacent layer. The three emulsions layers are each tabular grain emulsion layers with tabularities of greater than 25.

Abstract: Multicolor photographic elements are disclosed containing at least three dye image forming layer units. An enhancement of the speed-granularity relationship of a dye image is obtained when the corresponding dye image forming layer unit contains at least three superimposed emulsion layers. The two emulsion layers farther from the support contain silver bromoiodide emulsions, with the emulsion layer nearest the support containing a silver bromide or bromoiodide emulsion of up to 60 percent the iodide as a proportion of silver of the next overlying of the emulsion layers. The three emulsion layers each differ in speed from the next adjacent of the emulsion layers, with the fastest of the emulsion layers being located nearest the source of exposing radiation and being at least one half stop faster than the next adjacent layer and the slowest of the emulsion layers being located farthest from the source of exposing radiation and being at least one stop slower than the next adjacent layer.

Abstract: A photographic silver bromoiodide emulsion comprises a dispersing medium and a silver bromoiodide that (a) is monodispersed, cubic grain silver bromoiodide; (b) has a grain size within the range of 0.1 to 0.7 micron; (c) contains 1 to 7 mole percent iodide; and, (d) is prepared by a process comprising (i) forming the silver bromoiodide grains by mixing, in the presence of a thioether ripening agent, silver salt and alkali metal bromide and iodide salts until 60 to 90% of the silver salts have been added; then, (ii) carrying out the remainder of the silver bromoiodide grain formation with the addition of silver salt and alkali metal bromide and iodide salts that are no more than 1 mole percent iodide; wherein the resulting silver bromoiodide grains have no discernible shell as analyzed by x-ray diffraction. Such photographic silver bromoiodide emulsions are useful in photographic silver halide materials to provide longer exposure latitude.