Siegel Joerg

Photographic material, e.g. color negative, reversal or positive film, color (reversal) paper or dye diffusion transfer or silver dye bleach material, contains benzofuranone compound with substituent promoting adsorption on silver halide

Color photographic silver halide material, e.g. negative, reversal or positive film or color or color reversal paper, with sulfur and selenium and/or tellurium sensitizers is stabilized with dithiophosphoric or dithiophosphonic acid O-ester

Color photographic silver halide material, e.g. negative, reversal or positive film or color or color reversal paper, with sulfur and selenium and/or tellurium sensitizers is stabilized with acid hexahydro-s-triazine-2-thione

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

Spectrally-sensitized silver halide emulsion, useful in photographic material, e.g. color photographic camera or copying material, is supersensitized with 1-substituted 5-oxo-, 5-thio- or 5-imino-dihydro-1,2,4-triazole compound

Photographic silver halide material, especially color photographic material, contains 1,2,4-triazoline 3-thio- or -seleno-ether compound(s)

Color photographic material, e.g. negative or reversal film or paper, with packets of silver halide emulsions of different speed for each color sensitivity has slow to medium layer with emulsions differing in grain size and iodide content

Color photographic material combining improved sensitivity with good storage stability is chemically ripened with a short chain xanthate and spectrally sensitized with a cyanine dye

Color photographic material with reduced fog without sacrifice in sensitivity uses a long-chain xanthate as stabilizer to counteract the fogging effect of sulfur-, selenium or tellurium ripeners

Photographic material has silver halide-iodide emulsion containing dithiocarboxy-(het)arene compound and sensitized chemically with different sulfur, selenium or tellurium sensitizer