| 摘要 |
<p>A dispersion imaging material comprises a substrate, a sublayer thereon comprising at least 70% by weight of a member selected from palladium, gold, germanium and combinations thereof and having a thickness of 5 ANGSTROM to 200 ANGSTROM , and a main imaging layer on said sublayer comprising at least 50% by weight of tin, and optionally as the outermost layer a protective layer comprising an organic polymer. The sublayer modifies the layer structure of the tin-based main imaging layer. The imaging material has a high safety in respect of toxicity as well as an excellent gradation and a high sensitivity. The material is image wise exposed to radiant energy in an amount sufficient to raise the energy absorbed in the imaging layer above a threshold value at which the exposed areas decrease in optical density due to dispersion of the imaging layer. Conventional development and fixation steps are not required and the exposure process can be performed even in an illuminated room.</p> |
