Chemical sensitized modulo null of halogenation silver

摘要

PURPOSE: To provide a chemical sinsitizing method capable of obtaining a high sensitive silver halide emulsion high in contrast in gradation, small in fogging and less in the deterioration of photographic property in the preservation with time and using a selenium sensitizer and/or tellurium sensitizer. ;CONSTITUTION: This silver halide emulsion is chemically sensitized by adding a particulate which is prepared in the presence of a protective colloid, contains Se or Te and further contains Ag or Au to it. The particulate contains Se or Te and preferably contains Ag and Au and furthermore S is preferably incorporated in the particulate.;COPYRIGHT: (C)1994,JPO&Japio