ABSTRACT
Photographic emulsions comprise silver halide microcrystals of 0.03-3 micrometer diameter dispersed in aqueous gelatin. The use of monosize silver halide dispersions extends well beyond model systems for the study of crystal growth and sensitization mechanisms to ever-widening commercial application as emulsion components in large-scale manufacturing of photographic films and papers. Even in monosize silver halide dispersions, not all the crystals will have the same photosensitivity. Some of the factors responsible for this additional sensitivity spread have been identified. Crystal habit influences the surface structure and reactivity of silver halides. The most recent color films and conventionally processed black-and-white films use technological approaches based on applications of monosize technology, primarily in the area of tabular crystals (thin tabular crystals also known as T-grains). Twinned monosize emulsions based on the recrystallization of silver iodide have been used since 1978 for higher speed silver dye-bleach materials for small portrait applications (e.g., passport photography).
