METHOD FOR DECREASING RECIPROCITY LAW FAILURE OF EMULSION AND PHOTOGRAPHIC ELEMENT CONTAINING SILVER HALIDE PRODUCED BY THE METHOD CONSTITUTION

摘要

PURPOSE: To assure the stable photosensitivity during preservation as well as a low reciprocity law failure by adding bromide simultaneously with or after iridium to a silver chloride emulsion. ;CONSTITUTION: This method of decreasing the reciprocity law failure of the silver chloride emulsion includes a stage of adding the iridium and the bromide to the emulsion contg. the iridium in the amt. between 2×10^-9mol and 5×10^-6mol, the emulsion existing in the amt. between 0.25mol% and 4mol% in the final emulsion, the photographic element contg. the iridium in the amt. between 2×10^-9mol and 5×10^-6mol and the silver chloride emulsion. The bromide is added simultaneously with or after the iridium. The iridium is included between 1×10^-10mol and 1×10^-5mol per 1mol final silver of the final emulsion and the bromide exists between 0.1mol% and 10mol% in the final emulsion. The silver chloride agent before the addition of the iridium and the bromide contains at least 90% silver chloride.;COPYRIGHT: (C)1994,JPO