PHOTOTHERMOGRAPHIC COMPOSITIONS, ELEMENT AND PROCESS

摘要

PHOTOTHERMOGRAPHIC COMPOSITION, ELEMENT AND PROCESS Improved sensitivity to certain wavelengths of light and improved contrast are provided by certain photothermographic compositions containing a sensitizing concentration of a non-silver iodide salt. Such photothermographic compositions, prepared by (A) preparing a dispersion of (a) an oxidation-reduction image-forming combination comprising (i) a silver salt oxidizing agent and (ii) an organic reducing agent, with (b) ex situ, synthetic polymer-peptized photosensitive silver halide, (c) a cyclic imide toner in (d) a non-gelatin polymeric binder, contain a sensitizing concentration of a non-silver iodide salt, such as lithium iodide. The described non-silver iodide salt can be mixed with described photothermographic compositions at different stages of preparation of the compositions.