Enhanced bleaching of photographic elements containing...

Details Enhanced bleaching of photographic elements containing... Enhanced bleaching of photographic elements containing...

G - Physics

03

C

96/71, 96/84

G03C 5/44 (2006.01) G03C 7/42 (2006.01)

Patent

CA 1251679

ENHANCED BLEACHING OF PHOTOGRAPHIC ELEMENTS CONTAINING SILVER HALIDE AND ADSORBED DYE Abstract of the Disclosure The bleaching from photographic elements of silver produced by the development of silver halide having a dye adsorbed to its surface by employing as a bleaching agent a ferric complex of a polycar- boxylic acid is improved by the presence of a compound of the formula: Image (I) wherein Ar is an aromatic linking group, R1, R2, R3, and R4 are hydroxy substitut- ed lower alkyl groups, R5 and R6 are lower alkanediyl groups, X is a charge balancing counter ion, x and y are 0 or 1, and z is 0, 1, or 2.

485071

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