Hydrogen atom donor compounds as contrast enhancers for black-an
Hydrolyzed azolium speed enhancing/fog-inhibiting agents for sil
Hydrophilic colloid composition for a photographic material
Hydrophilic colloid composition for a photographic material
Hydroquinone derivatives and their use in photographic materials
Hydroquinone derivatives and their use in photographic materials
Hydroquinone derivatives as scavengers for oxidized developer
Hydroxyarylacyl dye compounds and silver halide photographic ele