Camera Speed Dry Silver Film.

In order to increase the photosensitivity of Dry Silver, knowledge of both the photosensitive and the thermographic aspect of Dry Silver had to be advanced. In order to increase the photosensitivity, silver halide crystals had to be prepared which were more prone to photolytic reduction. The choice of halide ion and the associated cation were found to be critical for the highest photosensitivity. The objective of this study was to determine the technical feasibility of formulating, coating, and testing experimental laboratory coatings of dry silver films with panchromatic photosensitivity of AEI20, and capable of being thermally processed from exposed latent image form to usefully permanent visible silver image form within 30 seconds or less using temperatures less than 300F. The dry silver films coated with high photosensitivity were found to have base fog, and tended to have short, useful package self life as well as limited image permanence, and limited reproducibility. Aspects of the experimental panchromatic sensitive dry silver films which require furhter work to provide a more useful film are higher photosensitivity with latent image stability and light stability.