A Study of Sulphur Sensitization at Definite Silver Bromide Crystal Faces

Paper presented at the “Congress International de Science Photo-graphique” held in Paris in September 1965.

Abstract

Sulphur digestion of homodisperse emulsions with regular cubic AgBr grains led to an increase of threshold sensitivity vs. ripening time. A sensitivity decrease and a substantially higher rate of Ag₂S-formation however has been observed under the same experimental conditions with emulsions containing perfect AgBr octahedra. This can be explained by a consideration of different nucleation mechanisms on (100) and (III) crystal faces and the formation of numerous sensitivity centres on (III) faces which compete in electron capture thus causing a sensitivity decrease.

Notes

Paper presented at the “Congress International de Science Photo-graphique” held in Paris in September 1965.