High bromide{111} tabular grain emulsions with improved dispersity
OwnerGertjan Bogels, Jan Bastiaan Boustra +1inventors
InventorsGertjan Bogels, Jan Bastiaan Boustra, Yuzo Toda
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Abstract
The invention relates to tabular silver halide emulsions that are useful in the field of photography and particularly to a process for preparing the tabular silver halide emulsions. The process of the invention relates to tabular grain formation process which is carried out in the presence of a compound which has a preferred adsorption to {111} crystal faces as compared to {100} crystal faces. The parameter for the preferred adsorption follows from a modified Kubelka-Munk method.
Claims20
1-19. (canceled)
A process for producing a {111} tabular silver halide emulsion in which an aqueous solution of a silver salt is combined with an aqueous solution of a halide salt forming {111} tabular silver halide grains in the presence of a water-soluble polymeric compound which has a preferred adsorption to {111} crystal faces of −3 or less as determined by subtracting the value for the adsorption to {111} crystal faces from the value for the adsorption to {100} crystal faces, measured at pH=9, said values being determined by the modified Kubelka-Munk method as described in T. Tani J. Imag. Sc 29 (1985) vol 29, 165 in the presence of the water soluble polymeric compound.
Dependencies are inferred from the claim text.