摘要:
A method for forming a direct positive image comprising the steps of:(a) imagewise exposing a photographic light-sensitive material composed of a support having thereon at least one unprefogged internal latent image type silver halide light-sensitive emulsion layer; and(b) developing the exposed photographic light-sensitive material to form a direct positive image in the presence of at least one nucleating agent represented by formula (N-I); ##STR1## wherein Z.sup.1 represents nonmetal atomic group necessary for forming a 5-membered or 6-membered heterocyclic ring, a 5-membered or 6-membered heterocyclic ring fused with an aromatic ring, or a 5-membered or 6-member heterocyclic ring fused with another heterocyclic ring; R.sup.1 represents an aliphatic group; X represents ##STR2## Q represents a nonmetallic atomic group necessary for forming a 4-membered to 12-membered nonaromatic hydrocarbon ring or a 4-membered to 12-membered nonaromatic heterocyclic ring; provided that at least one of R.sup.1, Z.sup.1 and Q is substituted with an alkynyl group; Y represents a counter ion required for charge balance; and n is a number required for charge balance; or Z.sup.1 contains a heterocyclic quaternary ammonium salt completed by said Z.sup.1 via a linkage group.
摘要:
A process for the formation of direct positive images comprising (1) imagewise exposing to light, a light-sensitive material comprising a photographic emulsion layer containing unfogged internal latent image type silver halide particles on at least one support, and (2) developing the light-sensitive material in the presence of a nucleating agent and at least one nucleation accelerator of general formula (I):A--(Y).sub.n R].sub.m (I)wherein A represents a group which is adsorbed by a silver halide; Y represents a divalent linkage group consisting of atoms or atomic groups selected from the group consisting of a hydrogen atom, a carbon atom, a nitrogen atom, an oxygen atom, and a sulfur atom; R represents an organic group containing at least one of a thioether group, an amino group, an ammonium group, an ether group, and a heterocyclic group; n represents an integer of 0 or 1; and m represents an integer of 1 or 2 to form direct positive images.
摘要:
A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide photographic emulsion layer, wherein at least one layer selected from the emulsion layer and other hydrophilic colloid layers contains at least one alkynyl substituted heterocyclic quaternary ammonium salt represented by the following general formula (I): ##STR1## wherein Z represents a non-metallic atomic group necessary to form a substituted or unsubstituted 5-membered or 6-membered heterocyclic ring to which a aromatic ring or a heterocyclic ring may further be condensed; R.sup.1 represents a substituted or unsubstituted aliphatic group; X represents ##STR2## Q represents a non-metallic atomic group necessary to form a substituted or unsubstituted 4-membered to 12-membered non-aromatic hydrocarbon ring or substituted or unsubstituted non-aromatic heterocyclic ring; at least one of R.sup.1, a substituent for Z and a substituent for Q includes an alkynyl group; Y represents a counter ion necessary for charge balance; and n represents a number necessary to balance the charge.
摘要:
The present invention relates to a direct positive silver halide photosensitive material and a method for forming a direct positive image. By the use of a novel nucleating agent having a specific structural formula, the present invention provides a direct positive silver halide photosensitive material with an increased Dmax value and a decreased Dmin value, as compared with the use of the conventional nucleating agents, even if a small amount of the novel nucleating agent is used, and does not substantially reduce the Dmax value, even if the photosensitive material is kept in a high-humidity state for a long time before exposure.
摘要:
A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide photographic material contains at least one compound represented by the following general formula (I):A--Time).sub.t X (I)wherein A represents an oxidation reduction moiety comprising an atomic group which does not enable --Time).sub.t X to be released until the oxidation reduction moiety is oxidized during photographic development processing; Time represents a timing group which is connected to A through a sulfur atom, a nitrogen atom or an oxygen atom; t represents an integer of 0 or 1; and X represents a group represented by the following general formula (II): ##STR1## wherein R represents a straight chain or branched chain alkylene group, a straight chain or branched chain alkenylene group, a straight chain or branched chain aralkylene group or an arylene group; Z represents a polar substituent; Y represents ##STR2## R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aralkyl group; and n represents an integer of 0 or 1. The silver halide photographic material exhibits a large interimage effect without deterioration of other photographic properties and thus provides photographic images excellent in sharpness and graininess.
摘要:
A process for forming a direct-positive image by developing an imagewise exposed photosensitive material, having on a support at least one photographic emulsion layer containing nonprefogged silver halide grains capable of forming an internal latent image, in which development is carried out in the presence of a combination of a nucleating agent and at least one compound having at least one mercapto group selected from a tetrazaindene, a triazaindene, and a pentaazaindene. The hydrogen atom of which mercapto group may optionally be further substituted with an alkali metal atom or an ammonium group. The invention process provides rapid and consistent formation of direct-positive images having high maximum density and low minimum density.
摘要:
A method for forming a direct positive image having a high Dmax and a low Dmin, which comprises image-wise exposing a photographic light-sensitive material having on a support at least one photographic emulsion layer containing unprefogged internal latent image-type silver halide grains and developing the photographic light-sensitive material after or while fogging to form direct positive image, wherein the aforesaid development is performed in the existence of at least one compound selected from the group consisting of compounds represented by formula (I), (II), (III), (IV), (V) or (VI), acid salts of compounds represented by formula (I) to (IV) provided substituents thereof contain an amino group, and acid salts of compound represented by formula (V) or (VI); ##STR1## wherein symbols are defined as in claim 1.
摘要:
A process for forming a direct positive color image is disclosed, the process comprising imagewise exposing a photosensitive material containing at least one emulsion layer of silver halide of internal latent image type, which has not been preliminarily fogged, and a color image-forming coupler; developing said material using a surface developing solution containing an aromatic primary amine color developing agent in the presence of a nucleating agent and/or in the condition that fogging exposure is carried out prior to the developing step or during the developing step; bleaching; and fixing, wherein said color coupler is a compound which is in itself substantially nondiffusible, and capable of forming or releasing a substantially nondiffusible dye upon oxidative coupling with said aromatic primary amine color developing agent and said development processing is carried out at a pH of 11.5 or less using a developing solution containing substantially no benzyl alcohol in the presence of at least one compound selected from the group consisting of the compounds represented by the general formula (I)A[(Y.sup.1).sub.n R].sub.m
摘要:
A silver halide color photographic lightsensitive material comprising at least one layer on a support, wherein the at least one layer contains a coupler represented by formula (I) below wherein X represents a hydrogen atom, halogen atom, arylthio group, carbamoyloxy group, heterocyclic carbonyloxy group, etc., each of R1 and R2 represents an electron-attracting group having a Hammett's substituent constant &sgr;p value of not less than 0.20, the sum of the &sgr;p values of R1 and R2 being not less than 0.65, each of R3 and R4 represents a alkyl group, alkenyl group, alkynyl group, cycloalkyl group, cycloalkenyl group, etc., or alternatively, R3 and R4 may bond together to form a ring structure; and each of R11 to R15 independently represents a hydrogen atom or a substituent.
摘要翻译:一种卤化银彩色照相感光材料,其在载体上包含至少一层,其中所述至少一层包含由下式(I)表示的成色剂,其中X表示氢原子,卤素原子,芳硫基,氨基甲酰氧基,杂环羰氧基 等等,R1和R2各自表示哈米特取代基常数sigmap值不小于0.20的吸电子基团,R1和R2的sigmap值之和不小于0.65,R3和R4各自表示 烷基,烯基,炔基,环烷基,环烯基等,或者R3和R4可以键合在一起形成环结构; R 11〜R 15各自独立地表示氢原子或取代基。
摘要:
A method for forming an image comprising the steps of: (a) imagewise exposing silver halide photographic materials; where said photographic material contains (1) a compound represented by formula (I) ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group; R.sub.2 represents a hydrogen atom, an alkyl group, or an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group, or an oxycarbonyl group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, ##STR2## or an iminomethylene group; and A.sub.1 and A.sub.2 both represent a hydrogen atom, or one of A.sub.1 or A.sub.2 represents a hydrogen atom and the other represents a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, or a substituted or unsubstituted acyl group, and (2) a redox compound that can release a development inhibitor when oxidized; and (b) subjecting said imagewise exposed silver halide photographic materials to development-processing where a bath used in said development-processing contains a nucleation development accelerator.