| abstract |
A photographic material (film) containing a silver halide sensitive emulsion layer contains, in one coated layer, a dye of apsorption maximum 470 - 520 nm and of general formula: <IMAGE> (1 - pyrazolin + sulfophenyl - 5 - one - P - amino-benzylidene> wherein: R1, R6 = C1 - 6 (substituted) alkyl or alkoxy R2, R3 = as R, or H, halogen,-OH, carboxylic or salt and one of R2, R3 must be sulfonic acid or salt; R4, R5 = C1 - 6 (substituted) alkyl R7 = H1 halogen or as R1. A synthesis by condensation at the * bridge is described. 12 specific dyes are shown. The dye is present as 1 - 1000 mg/sq. m. It may be present, to prevent irradiation, in an emulsion layer; to exclude light in a protective layer or to prevent halation in a back layer or between the support and emulsion layer. |