The Adsorption of Hydroxyl ions to Silver Bromide and its Photographic Implications^*

* Read lo the International Conference on the Science and Applications of Photography, organized by the Royal Photographic Society, London, September. 1953.

Abstract

It is analytically shown that hydroxyl ions are adsorbed to a silver-bromide precipitate (silver body), the degree of the adsorption increasing with increasing pH. At the highest ph accessible to the analytical procedure (pH 9.5) roughly one OH-ion is adsorbed per 5 surface ion-sites. Although OH-ion adsorption to the bromide body could not be readily shown by the analytical procedure its existence is by no means excluded. The possible correlation between the postulated silver-hydroxyl surface complex and photographic sensitivity is briefly discussed and the hypothesis of a dual mechanism of latent image formation is reiterated.

Notes

* Read lo the International Conference on the Science and Applications of Photography, organized by the Royal Photographic Society, London, September. 1953.