| 摘要 |
<p>A photographic element which has a blue sensitive emulsion with broad blue spectral coverage and yet, good speed and low fog. The element has a blue sensitive silver halide tabular grain emulsion which has a tabularity of at least 25 sensitized with a dye of formula (I) and a dye of formula (II), wherein the formula (I) dye on the emulsion has a peak sensitization of between 400-445nm and the formula (II) dye on the emulsion has a peak sensitization of between 446-500nm: <CHEM> wherein: Z1, Z2, Z3 and Z4 independently represent the atoms necessary to complete a substituted or unsubstituted benzene or naphthylene; X, Y, X1 and Y1 are independently O, S, Se or NR5, provided that at least X or Y is O or NR5, where R5 is a substituted or unsubstituted alkyl or aryl; R1, R2, R3 and R4 independently represent H or a substituted or unsubstituted alkyl or aryl.</p> |
