| abstract |
A high contrast photographic material comprising a support bearing a silver halide emulsion layer, containing in the emulsion layer or an adjacent hydrophilic colloid layer, a hydrazide nucleating agent characterised in that the emulsion layer comprises silver halide grains which are spectrally sensitised and silver halide grains which are not spectrally sensitised, the sensitising dye(s) being chosen so that it does (they do) not become desorbed from said spectrally sensitised grains. |