| 摘要 |
Photographic elements, diffusion transfer assemblages and processes are described which employ a nondiffusible compound having a releasable azo dye moiety having the formula: <IMAGE> wherein: Z represents the atoms necessary to complete an aromatic carbocyclic or heterocyclic nucleus having at least one ring of 5 to 7 atoms; Z' is an aromatic carbocyclic or heterocyclic nucleus having at least one ring of 5 to 7 atoms, the Z' having, in a position adjacent to the point of attachment to the azo linkage, either (a) a nitrogen atom in the ring of the nucleus which acts as a chelating site, or (b) a carbon atom in the ring of the nucleus having directly attached thereto a nitrogen atom which acts as a chelating site; G is a metal chelating group, a salt thereof or a hydrolyzable precursor thereof; the compound also containing a ballasted carrier moiety which will release the diffusible azo dye under alkaline conditions. The dye is transferred imagewise to an image-receiving layer where it is contacted with metal ions to form a metal-complexed azo dye transfer image of excellent stability. |
