Cubical silver iodochloride emulsions, processes for their preparation and photographic print elements

摘要

Photographic emulsions are disclosed in which silver iodochloride grains are in part bounded by ä100ü crystal faces satisfying the relative orientation and spacing of cubic grains and contain up to 1 mole percent iodide, based on total silver, with maximum iodide concentrations being located nearer the surface of the grains than their center. A process of preparing the emulsions is disclosed in which grains accounting for at least 50 percent of total silver forming the silver iodochloride grains are grown in the dispersing medium and, while employing the grains as substrates for further grain growth, crystal lattice variances are located in the grains by iodide ion incorporation.