| 摘要 |
<p>Photographic silver halide emulsions are protected against latent image fading by aromatic latent image stabilizing compounds having the structure: < IMG > wherein: R1 is hydrogen, alkyl, or aryl; R2 and R3 are each individually hydrogen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl; X is a middle chalcogen; Z represents the atoms completing an aromatic nucleus; n is an integer of 1 or 2; and M?n cation of valence n chosen from the group consisting of an onium ion, an ion from Group IA or IIA, and a metal ion from Group IIB, VIIB, IVA, or VA.</p> |
