Document Type and Number:
Japanese Patent JPS5334488
Kind Code:
B1
Abstract:
The present invention relates to photographic light-sensitive material, especially for the silver dyestuff bleaching process, containing an azo dyestuff of the formula A-N=N-M-X-(Y-Z)n-1-Q in which A represents a naphthalene residue containing 1 to 2 sulphonic acid groups or sulphonic acid amide groups, bonded in the 1 position to the azo group, in the 2 position to a possibly substituted amino group and in the 8 position to a group or in the 2 position to the azo group, in the 8 position to a possibly substituted amino group and in the 1 position to a hydroxyl group, M stands for a possibly substituted benzene residue and Y for a possibly substituted benzene, diphenyl, diphenylsulphon or di-(phenylamino)-acylic residue, X stands for -O-, -S-, -SO-, -SO2-, -CO- or -NR- and Z stands for -CO-, -S-, -SO-, -SO2-, -CO-, NR1-, -Cl-NR1-, NR1-CO-, -SO2-NR1 or -NR1-SO2, in which R and R1 represent a hydrogen atom or a low alkyl residue, in which n = 1 or 2 and Q stands for a possibly substituted heterocyclic residue, alkyl or benzene residue or a residue of the formula - D - N = N - E in which D represents a possibly substituted benzene or naphthalene residue and E has the meaning which is stated in respect of A. These dyestuffs are magenta dyestuffs, preferably image dyestuffs in silver dyestuff bleaching material.
Application Number:
JP2977471A
Publication Date:
September 21, 1978
Filing Date:
May 04, 1971
Export Citation:
International Classes:
G03C1/83; G03C7/29; (IPC1-7): G03C7/02; C09B35/02; G03C5/52