| 摘要 |
PURPOSE:To improve the decoloring property, the color-reproducibility and the safe-light stability of the title material by incorporating a specified dyestuff in the sensitive material. CONSTITUTION:The dyestuff shown by formula I is incorporated in the emulsion layer or the another colloid layer of the sensitive material. In formula I, R1-R4 are each alkyl, aryl or a heterocyclic ring residual group, L1-L3 are each a methine group, (n) is 1-3, any one of the groups R1-R4 is a group having two or more of carboxylic or sulfo groups. The dyestuff may be incorporated in the sensitive material directly or in a dissolved state or in a dispersed state. The dyestuff can be localized in a prescribed layer by coexisting the dyestuff with a hydrophilic polymer having an electric charge opposite to that of an dyestuff ion, as a mordant. And the dyestuff is exemplified by the compd. shown by formula II, etc. |
