Kapitza Detlev

Production of a silver bromide-iodide emulsion with core-shell grains useful in color negative film uses 5-ring heterocycle with no mercapto or thiosulfonate substituents during double-jet precipitation of high bromide shell

Photographic color negative or reversal film has red-sensitive, cyan-coupling silver halide emulsion layer with maximum sensitivity in specified wavelength range and specified differences between this and speed at longer wavelengths

Color photographic material with improved sensitivity-fogging balance and stability contains a thiocyanate in addition to seleniulm and tellurium compounds and is preferably chemically ripened with the thiocyanate present

Production of spectrally-sensitized Ag halide emulsions suitable for use in color photography involves a final precipitation step in which a silver salt solution is added to increase electrochemical potential

Photographic film with a bromide-rich silver halide emulsion containing indium, yttrium, lanthanum or lanthanide to improve sensitivity on high-speed development

Negative silver halide emulsion, used in photographic material, e.g. color negative or reversal film or color or color reversal paper, has tabular coated grains with layer other than core or outer shell doped with mercury

Chemical sensitization of a silver halide emulsion, especially useful for color negative or reversal film, in presence of part of spectral sensitizer uses gold and selenium or tellurium sensitizers

Color photographic material, e.g. color negative film, has blue-sensitive tabular silver halide emulsion containing more antifogging agent than red- and green-sensitive emulsions

Negative silver halide emulsion, used for black-and-white and color negative and reversal film and paper, e.g. camera material, has coated grains in which intermediate layer with highest iodide content is doped with metal

Color photographic material, e.g. color negative film, has blue-sensitive tabular silver halide emulsion containing more emulsion stabilizer than red- and green-sensitive emulsions