| 摘要 |
PURPOSE:To improve the coloring property of the dye forming coupler by forming at least one layer of a hydrophilic colloidal layer contg. a specified compd. in combination with the dye forming coupler on a supporting body. CONSTITUTION:At least one layer of hydrophilic colloidal layers contg. the compd. shown by formula I in combination with the dye forming coupler is formed on the supporting body. In formula I, X is N atom or CH group, Y1-Y3 are each hydrogen atom or a substituting group, Y4 is a substituting group, (l) is an integer of 1-4. (m) is an integer of 1-3, (n) is an integer of 2-4, (l+n)<=6; when (l), (m) and (n) are each >=2, Y4 and Y3 etc. may be the same or the different with each other, Y1-Y3 together with each other may form a carbon ring or a heterocyclic ring, and at least one of the numbers (n) of the groups Y1 and Y2 is a substituting group. Thus, the coloring property of the dye forming coupler is improved. |
