| 摘要 |
<p>Photographic silver halide emulsions are protected against latent image fading by latent image stabilizing compounds having the structure: wherein: R1 is hydrogen, alkyl, or aryl, R2 and R3 are each individually hydrogen alkyl, alkoxy, carbox;, alkoxycarbonyl, or alminocarbonyl; R4 and R5 are each individually hydrogen, alkyl, aryl, cyano, halogen, formyl, carboxy, alkoxycarbonyl, aryloxycarbonyl or aminocarbonyl; n is an integer of 1 or 2; and m?n is a cation of valence n.</p> |
