| 摘要 |
<p>The present invention relates to photography and, more particularly, to diffusion transfer process photographic film units which comprise a photosensitive element adapted to provide, by diffusion transfer photographic processing, selective dye image recordation of incident actinic radiation as a function of the point-to-point degree of photosensitive element exposure, which film unit includes a plurality of essential layers including a polydisperse silver halide photosensitive emulsion layer comprising a particulate dispersion of photosensitive silver iodobromide, iodochloride or iodochlorobromide crystals possessing a mean iodide concentration within the range of about 0.5 to 15 mole % and in which not in excess of about 20%, by weight, of the crystals deviate from the selected mean iodide concentration by in excess of about +/-25%, by weight, of iodide, having associated therewith dye image-forming material which is diffusible during processing as a function of the point-to-point degree of silver halide layer exposure to incident actinic radiation and a layer adapted to receive dye image-forming material diffusing thereto; and to specified diffusion transfer processes employing such film units.</p> |
