| 摘要 |
<p>A non-silver image-forming composition comprises a material, preferably a cobalt(III) complex, capable of generating amines on reduction, a photoreductant, an aromatic-dialdehyde that reacts with the amines produced by exposing the composition to activating actinic radiation to give a dye, and a compound capable of providing an >NH moiety, if necessary on heating. The latter compound is present at a concentration sufficient to increase the photographic speed of a coating of the composition by at least 0.15 log unit.</p> |
