Abstract: A multilayer silver halide color photographic element comprises a support having coated thereon a silver antihalation layer, an interlayer, at least two red-sensitive silver halide emulsion layers, at least two green-sensitive silver halide emulsion layers a yellow filter layer, and at least two blue-sensitive silver halide emulsion layers, wherein a silver halide emulsion layer or a nonsensitive layer adjacent thereto comprises a bleach accelerator releasing coupler of formulaA-(TIME).sub.n -S-X-Rwherein A represents a coupler residue releasing from (TIME).sub.n -S-X-R upon reaction with the oxidation product of a color developing agent; TIME represents a timing group releasing S-X-R with delay under developing conditions; n represents 0 or 1; X represents a divalent linking groups consisting of an alkylene group containing 1 to 8 carbon atoms; and R represents a group selected in the group consisting of a), b) and c): ##STR1## wherein R.sub.

Abstract: The present invention describes a light-sensitive silver halide photographic material comprising a support and silver halide emulsion layer or layers, wherein at least one of said silver halide emulsion layers contains tabular silver halide grains having an average diameter to thickness ratio of at least 2:1 and at least one azodicarbonamide derivative.

Abstract: A process for preparation of 4-mercapto-1-naphthol compounds which comprises the steps of:(i) obtaining a 4-heterocyclylthio-1-naphthol compound by reacting a 1-naphthol compound with a heterocyclylsulfur chloride or by reacting a 4-iodo-1-naphthol compound with an alkali metal or ammonium salt of a mercaptoheterocyclic compound,(ii) hydrolyzing the resulting 4-heterocyclylthio-1-naphthol compound in the presence of a base to form a reaction product, and(iii) acidifying said reaction product.The resulting compounds are useful as intermediates in the synthesis of bleach accelerator releasing couplers for use in silver halide color photographic materials.

Abstract: An infrared sensitive silver halide photographic element is disclosed comprising a support and at least one silver halide emulsion layer spectrally sensitized to the infrared portion of the electromagnetic spectrum. In particular, an infrared sensitive color photographic element, capable of providing full color images without exposure to corresponding visible radiation, is disclosed, said element comprising at least three silver halide emulsion layers on a substrate, each associated with different photographic color image forming materials, such as color couplers capable of forming dyes of different colors upon reaction with an oxidized color photographic developer, diffusing dyes, bleachable dyes, or oxidized leuco dyes. The three emulsion layers are sensitized to three different portions of the electromagnetic spectrum with at least two layers sensitized to different regions of the infrared region of the electromagnetic spectrum.

Abstract: Silver halide photographic element comprising a support and at least one silver halide emulsion layer, characterised in that said silver halide emulsion layer is spectrally sensitized to infrared radiation with a tricarbocyanine dye having the formula: ##STR1## wherein, Z.sub.1 and Z.sub.2 each independently represents the atoms necessary to complete a thiazole nucleus or an oxazole nucleus,Z.sub.3 represents the atoms necessary to complete a 5-membered N-containing aromatic ring, Q represents the atoms necessary to complete a 5- or 6-membered carbocyclic ring, R.sub.1 and R.sub.2 each independently represents an alkyl group, X.sup.- represents an anion, and n represents an integer of 1 to 2, provided that n is 1 when the dye forms an intramolecular salt.

Abstract: The present invention refers to a silver halide photographic element containing a support having coated thereon at least a silver halide emulsion layer spectrally sensitized with a sensitizing dye according to the formula (I): ##STR1## wherein Z represents the atoms necessary to complete a 6-membered nitrogen-containing heterocyclic nucleus; at least 2 members of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 --but not R.sub.1 and R.sub.2 together--represent an organic group carrying a water-solubilizing group in free acid form, in salt form or in latent form, and are same or different, the members of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 that do not represent a said organic radical carrying a water-solubilizing group represent hydrogen, an alkyl group, an alkenyl group or an aryl group; and n is 0 or 1.The silver halide photographic material has the advantage to have a broad sensitivity in the red portion of the spectrum. It can be exposed to laser beam sources in the range of 600-700 nm.

Abstract: An infrared sensitive silver halide photographic element which contains a dye represented by the following formula: ##STR1## wherein R.sub.1 and R.sub.2 each independently represent a sulfoalkyl or a sulfatoalkyl group having 2 to 4 carbon atoms, Q represents the atoms necessary to complete a 5- or 6-membered carbocyclic ring group, R.sub.3 represents an alkyl group, R.sub.4 represents an aryl group, X.sup.- represents an anion, n is an integer of 1 or 2, provided that that n is 1 when the dye forms an intramolecular salt, and Z.sub.1 and Z.sub.2 each independently represent the atoms necessary to complete an indole nucleus.

Abstract: An infrared sensitive silver halide photographic element which contains an infrared-absorbing dye represented by the following formula ##STR1## wherein: R.sub.1 and R.sub.2 each independently represents a sulfoalkyl or a sulfatoalkyl group,Q represents the atoms necessary to complete a 5- to 6- membered carbocyclic ring,Z.sub.3 represents the atoms necessary to complete a 5-membered N-containing aromatic ring,X.sup.- represents an anion,n is an integer of 1 or 2, provided that n is 1 when the dye forms an intramolecular salt, andZ.sub.1 and Z.sub.2 each independently represents the atoms necessary to complete a substituted or unsubstituted indole nucleus.

Abstract: The addition of simple merocyanine spectral sensitizing dyes to silver halide photothermographic emulsions improves the stability of the emulsion during storage before heat processing.

Abstract: An infrared sensitive silver halide photographic element is disclosed comprising a support and at least one silver halide emulsion layer spectrally sensitized to the infrared portion of the electromagnetic spectrum. In particular, an infrared sensitive silver halide color photographic element, capable of providing full color images without exposure to corresponding visible radiation, is disclosed, said element comprising at least three silver halide emulsion layers on a substrate, each associated with different photographic color image forming materials, such as color couplers capable of forming dyes of different colors upon reaction with an oxidized color photographic developer, diffusing dyes, bleachable dyes, or oxidable leuco dyes. The three emulsion layers are sensitized to three different portions of the electromagnetic spectrum with at least one layer sensitized to radiation within the infrared region of the electromagnetic spectrum.

Abstract: A multilayer silver halide color photographic element comprising at least one blue-sensitive silver halide emulsion layer comprising a blue spectral sensitizing dye and a supersensitizing amount of a disulfide compound of formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, equal or different, each represents a hydrogen atom or a lower alkyl group, R.sub.5 represents a hydrogen atom, a formyl group or an acetyl group, R.sub.6 and R.sub.7, equal or different, each represents a hydrogen atom or a lower alkyl group, or R.sub.6 and R.sub.7 represent the elements needed to complete an unsaturated cyclic nucleus.The combination provides a blue-sensitive silver halide emulsion layer having high sensitivity, low fog and good resistance against fading of the latent image.

Abstract: Aliphatic diesters of alkylenedicarboxylic acid compounds are water-immiscible high-boiling organic solvents useful for dispersing hydrophobic photographic additives in hydrophilic colloid compositioins which are incorporated into light-sensitive silver halide photographic materials.In particular, said aliphatic diesters of alkylenedicarboxylic acid compounds correspond to the general formula ##STR1## wherein R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10, equal or different, each represents a hydrogen atom or a lower alkyl group, with the proviso that at least one of R.sub.3, R.sub.5, R.sub.7 and R.sub.9 is an alkyl group or at least one pair of R.sub.4 and R.sub.6 or R.sub.8 and R.sub.10 are both alkyl groups and the total number of carbon atoms in R.sub.3, R.sub.4, R.sub.5 and R.sub.6 and the total number of carbon atoms in R.sub.7, R.sub.8, R.sub.9 and R.sub.10 is, each, less than 12, and m is 0 to 10.

Abstract: Alkylenglycol aliphatic diesters are water-immiscible high-boiling organic solvents useful for dispersing hydrophobic photographic additives in hydrophilic colloid compositions which are incorporated into the composing layers of light-sensitive silver halide photographic materials.In particular, said alkylenglycol aliphatic diesters correspond to general formula ##STR1## wherein R.sub.1 and R.sub.2, the same or different, each represents an alkyl group having 1 to 15 carbon atoms, Q represents an acylic hydrocarbon divalent group having 1 to 10 carbon atoms, m represents 0 or 1 and the total number of carbon atoms represented in R.sub.1 +R.sub.2 is at least 6.

Abstract: Benzo-bis-thiazole quaternary salts having attached to at least one quaternary nitrogen atom thereof an alkenyl group carrying a double bond in the .beta.-position and their use as antifogging agents in silver halide light-sensitive materials.

Abstract: Cyan dye-forming 6-hydroxy-2H-1,4-benzoxazin-3-(4H)-one couplers, preferably cyan dye-forming couplers corresponding to the general formula: ##STR1## wherein R represents hydrogen or R"'--X--NH, R' represents hydrogen or a substituted or unsubstituted alkyl group, R" represents hydrogen or R.sup.iv --X--, X represents a member selected from the group consisting of --CO--, --SO.sub.2 --, --OCOCO--, --NHCO--, R"' and R.sup.iv represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group and Y and Z, the same or different, represent hydrogen, halogen and a substituted or unsubstituted alkyl or alkoxy group,are described for use in silver halide color photographic processes and elements.

Abstract: Cyan dye-forming 6-hydroxy-2H-1,4-benzoxazin-3-(4H)-one couplers, preferably cyan dye-forming couplers corresponding to the general formula: ##STR1## wherein R represents hydrogen or R"'--X--NH, R' represents hydrogen or a substituted or unsubstituted alkyl group, R" represents hydrogen or R.sup.iv --X--, X represents a member selected from the group consisting of --CO--, --SO.sub.2 --, --OCOCO--, --NHCO--, R"' and R.sup.iv represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group and Y and Z, the same or different, represent hydrogen, halogen and a substituted or unsubstituted alkyl or alkoxy group,are described for use in silver halide color photographic processes and elements.

Abstract: 5-hydroxy-6-acylamino-benzoxazole-2-one compounds, such as those responding to the formula: ##STR1## wherein m is 0, 1; R represents a substituted or unsubstituted alkyl, aryl group or a heterocyclic group; R.sub.1 represents a substituted or unsubstituted alkyl or aryl group or R.sub.2 --X--, wherein X represents a member selected from the group consisting of CO, SO.sub.2, OCOCO and NHCO and R.sub.2 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; and V and W, the same or different, represent hydrogen, halogen or a lower alkyl or alkoxy group, are described as cyan dye-forming couplers for use in silver halide color photographic elements and processes.

Abstract: Cyan dye-forming 6-hydroxy-2H-1,4-benzoxazin-3-(4H)-one couplers, preferably cyan dye-forming couplers corresponding to the general formula: ##STR1## wherein R represents hydrogen or R'"--X--NH, R' represents hydrogen or a substituted or unsubstituted alkyl group, R" represents hydrogen or R.sup.iv --X--, X represents a member selected from the group consisting of --CO--, --SO.sub.2 --, --OCOCO--, --NHCO--, R'" and R.sup.iv represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group and Y and Z, the same or different, represent hydrogen, halogen and a substituted or unsubstituted alkyl or alkoxy group,are described for use in silver halide color photographic processes and elements.