摘要:
A photographic image is formed with silver halide emulsions by using optically unsensitized light sensitive (coarse) silver halide grains. Optically (or spectrally) sensitized fine grains (or crystals or particles),--especially light insensitive or Lippmann silver halide grains--, can be reactively associated with optically (or spectrally) unsensitized light sensitive (coarse) silver halide grains to get a combination of Spectrally Sensitized Fine Grains with Spectrally Unsensitized Light Sensitive or Coarse Grains, --especially Tabular Grains--, which can be imagewise exposed (to the light absorbed by the dye sensitizer adsorbed on the surface of such fine grains) and developed with substantially the same sensitivity of the light sensitive optically sensitized (coarse) silver halide grains.
摘要:
A heat-developable color light-sensitive material is provided comprising on a support at least a light-sensitive silver halide emulsion, a binder, a compound capable of producing or releasing a mobile dye in direct or inverse proportion to the reaction of the light-sensitive silver halide being reduced into silver at elevated temperatures, and a dye having the general formula: ##STR1## wherein each of R.sup.1 and R.sup.2 is a substituted or unsubstituted alkyl or alkenyl group,R.sup.3 is a hydrogen atom, or substituted or unsubstituted alkyl, alkoxy, aryl or alkenyl group,each of X.sup.1, X.sup.2, X.sup.3, and X.sup.4 is a hydrogen atom, halogen atom, hydroxyl, carboxyl, or substituted or unsubstituted alkyl, alkoxy, alkoxycarbonyl, acyl, acyloxyl, aryl, amino, or acylamino group,X.sup.1 and X.sup.2, and X.sup.3 and X.sup.4 can be mutually combined to form a benzene ring,A.sup.- is an anion, andn is equal to 0 or 1.
摘要:
Disclosed is a silver halide photographic emulsion made highly sensitive to white light by use of a combination of at least one sensitizing dye represented by the general formula: ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group, or an aralkyl group, R.sub.2 represents a sulfoalkyl group, or a sulfoaralkyl group, and R.sub.3 represents an unsubstituted or substituted alkyl group, and at least one sensitizing dye represented by the general formula: ##STR2## wherein W.sub.1 to W.sub.4 represent each an alkyl group, an alkoxy group, or a hydroxyl group, or a pair of W.sub.1 and W.sub.2 or a pair of W.sub.3 and W.sub.4 forms an alkylenedioxy group, provided that said pair of W.sub.1 and W.sub.2 and said pair of W.sub.3 and W.sub.4 have each at least one alkoxy or hydroxyl group or said alkylenedioxy group; R.sub.4 represents a hydrogen atom, an alkyl group, an aralkyl group, or an aryl group; R.sub.5 represents a sulfoalkyl group or a sulfoaralkyl group; and R.sub.6 represents an unsubstituted or substituted alkyl group.
摘要:
Photographic silver halide is spectrally sensitized by means of at least one bleachable spectral sensitizing dye comprising a cyanine dye nucleus and a particular N-methylene substituent. The spectrally sensitized photographic silver halide is useful in a photothermographic material. An image in the photothermographic material, after exposure, is developed and the spectral sensitizing dye is bleached, especially at elevated pH, by heating the photothermographic material to processing temperature.
摘要:
Photosensitive silver halide emulsions containing a green-sensitive dye of the formula ##STR1## wherein R is hydrogen or chlorine. The invention is also directed to the novel sensitizing dyes.
摘要:
Photographic silver halide compositions and elements are provided which are spectrally sensitized with new methine dyes. The dyes are prepared from new intermediate compounds which have an acetylenically unsaturated hydrocarbon chain terminated with a nucleophilic group, the acetylenically unsaturated hydrocarbon chain being bonded to a nitrogen atom in a heterocyclic ring system of the type used in cyanine dyes. The new intermediates also provide alternative synthetic routes to known dyes.
摘要:
A silver halide photographic emulsion containing, in supersensitizing amounts, a combination ofat least one benzimidazolocarbocyanine dye wherein an aralkyl group substituted with an acidic group is connected to at least one nitrogen atom in the imidazole ring, which is represented by the following general formula (I): ##STR1## wherein V.sub.1, V.sub.2, V.sub.3 and V.sub.4, which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an acyl group, an acyloxy group, an alkoxycarbonyl group, a carbamoyl group, a sulfamoyl group, a cyano group, a trifluoromethyl group or a hydroxy group; R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents an aliphatic group; A represents a sulfo group of a carboxy group; X.sub.1 represents an acid residue; h represents an integer from 1 to 6; and i represents 0 or 1; andat least one cyanine dye represented by the following general formula (II): ##STR2## wherein Z.sub.1 represents the atoms necessary to complete a thiazole ring or a selenazole ring; Z.sub.2 represents the atoms necessary to complete a thiazole ring, a selenazole ring or an oxazole ring; R.sub.4 represents a hydrogen atom, an aliphatic group or an aryl group; R.sub.5 and R.sub.6, which may be the same or different, each represents an aliphatic group; X.sub.2 represents an acid residue; and l and n each represents 0 or 1; which demonstrates reduced fog, reduced residual color and high sensitivity, and, further, which is endowed with desirable spectral sensitization distribution and minimized deterioration with the lapse of time under high temperature and humidity conditions.
摘要翻译:一种卤化银感光乳剂,其以超敏量的量含有至少一种苯并咪唑羰花青染料的组合,其中由酸性基团取代的芳烷基与咪唑环中的至少一个氮原子连接,其由以下通式( I):其中V1,V2,V3和V4可以相同或不同,各自表示氢原子,卤素原子,烷基,烯基,环烷基,酰基 基团,酰氧基,烷氧基羰基,氨基甲酰基,氨磺酰基,氰基,三氟甲基或羟基; R 1,R 2和R 3可以相同或不同,各自表示脂族基团; A表示羧基的磺基; X1表示酸残基; h表示1〜6的整数, i表示0或1; 和由以下通式(II)表示的至少一种花青染料:其中Z1表示完成噻唑环或硒唑环所需的原子; Z2表示完成噻唑环,硒咯环或恶唑环所需的原子; R4表示氢原子,脂族基或芳基; R 5和R 6可以相同或不同,各自表示脂族基团; X2表示酸残基; l和n各自表示0或1; 这表明减少了雾,降低了残留颜色和高灵敏度,并且进一步地,其具有期望的光谱增感分布,并且在高温和高湿条件下随时间流逝的最小化劣化。
摘要:
A method of bleaching an imagewise exposed and then developed silver halide photosensitive material for color photography wherein said material contains a red sensitive silver halide emulsion layer having at least one of a particular group of compounds and treating said photosensitive material with a bleaching or bleach-fixing solution containing an organic metal chelate compound.
摘要:
A lith-type silver halide photographic light-sensitive material for forming halftone dot images is disclosed which contains a sensitizing dye represented by the following general formula: ##STR1## WHEREIN Z.sub.1 is an atomic group necessary for forming a naphthothiazole ring, Z.sub.2 is an atomic group necessary for forming a member selected from a group consisting of substituted or unsubstituted, benzothiazole, benzoselenazole, naphthothiazole and naphthoselenazole nucleus, R.sub.1 and R.sub.2 are respectively a substituted or unsubstituted alkyl group, X.sup..theta. is an anion, and n is a positive integer of 1 or 2 with the proviso that when the dye is an inner salt, n is 1.
摘要:
New cyanine dyes derived from di-halogen-benzoxazoles and benzothiazoles are desensitizers for silver halide negative emulsions and useful electron acceptor spectral sensitizers for direct positive silver halide emulsions.