Abstract: A position sensor has an interface structure between negative dielectrics and a dielectric, and is provided with a configuration in which the plasmon intensity with respect to a microstructure in a surface including the interface structure or in the vicinity thereof is detected by the interface structure, and the positional relationship between the interface structure and the microstructure is thereby detected.

Abstract: A polyhydroxyalkanoate characterized by having in the molecule a unit represented by Chemical Formula (1): wherein n may assume any one integral value within the range of from 1 to 8. Also disclosed are a process for producing the polyhydroxyalkanoate by the use of a microorganism having the ability to produce the polyhydroxyalkanoate and accumulate it in the bacterial body; a charge control agent, a toner binder and a toner which contain this polyhydroxyalkanoate; and an image-forming method and an image-forming apparatus which make use of the toner.

Abstract: A photographic developer composition for use in the development of a black and white silver halide photographic element said composition comprises at least one developing agent and, in an amount sufficient to inhibit sludge deposition, one or more compounds selected from compounds having the formula X—R1—CONH-A-S—S—B—NHCO—R2—Y??(I) wherein A and B are each independently a substituted or unsubstituted aliphatic, alicyclic, aromatic or heterocyclic group; R1 and R2 are each independently a substituted or unsubstituted aliphatic, alicyclic, aromatic or heterocyclic group; X and Y are each independently a solubilizing group; and compounds having the formula X—R1—CONH-A-S-M??(II) wherein A, R1 and X are as defined above, and M is either a hydrogen atom or a cationic species if the sulfur atom is in its ionized form.

Abstract: The invention is to provide polyhydroxyalkanoate of a novel structure enabling application to wider fields, and a producing method therefor. The invention also provides a biodegradable charge control agent having excellent charging characteristics, excellent dispersibility in the toner resin and improved spent property. The polyhydroxyalkanoate of the present invention is featured by including, in the polymer molecule, a units represented by the general formulas (1) and (2) and at least one of the units represented by the general formulas (3) to (6).

Abstract: A photographic developer composition for use in the development of a black and white silver halide photographic element said composition comprises at least one developing agent and, in an amount sufficient to inhibit sludge deposition, one or more compounds selected from compounds having the formula

Abstract: A method has been described for processing an exposed black-and-white silver halide photographic film material comprising in a hydrophilic light-sensitive layer thereof a binder and silver halide grains being {111} or {100} tabular silver bromo(chloro)iodide or silver chloro(bromo)iodide grains having an average aspect ratio of from 1.2 to 50 and having a silver iodide content of less than 3 mole % based on silver with at least part of it at their grain surface, said method comprising the steps of developing in a developer, fixing in a fixer, rinsing and drying, characterized in that in said developing step the developer comprises an alkali soluble agent having preventing silver dissolution properties, being a mercapto azole compound as presented herein.

Abstract: A method for processing a silver halide light-sensitive material employing an automatic processing machine is disclosed. A developer comprises compounds represented by the formula (1), and a fixer comprises thiosulfate salts, water-soluble aluminum salts, and at least one type of crystallization retarding agents and substantially comprises no boron compound.

Abstract: A method of processing has been described for a light-sensitive black-and-white silver halide photographic material comprising the distinct steps of developing, fixing, rinsing and drying, wherein during said processing said developer comprises, besides one or more developing agent(s), one or more agent(s) preventing oxidation thereof and agent(s) providing pH buffering in running equilibrium conditions during said processing, at least one agent preventing silver dissolution and at least one silver complexing agent, characterized in that said agent preventing silver dissolution, if present in an amount of 50 mg/l of developer, makes silver content of the developer decrease in an amount of more than 50% versus in the absence thereof, without loss in speed in an amount of more than 0.10 log Exposure after processing in said developer composition; said silver complexing agent makes silver content of the said developer increase in an amount of more than 1 mg per liter per mmole of said complexing agent.

Abstract: A development processing method comprising a step of developing a silver halide photographic material having at least one silver halide emulsion layer with a developing solution containing a hydroquinone developing agent, wherein said developing solution has a pH of from 9.0 to 11.0, and contains a compound represented by formula (I) and a compound represented by formula (II) in a concentration ratio of the compound represented by formula (II)/the hydroquinone developing agent of from 0.03 to 0.12: ##STR1## wherein the symbols in these formulae are defined in the specification.

Abstract: A developing solution for silver halide photographic material contains a six-membered heterocyclic compound having two nitrogen atoms as the constituent atoms of the six-membered ring and mercapto group, hydroxyl group and at least one substituent group other than hydrogen atom and a five-membered heterocyclic compound having two to three nitrogen atoms as the constituent atoms of the five-membered ring and at least one mercapto group. There is also disclosed a method for processing a silver halide photographic material with said developing solution.

Abstract: Color photographic elements, especially color photographic papers, can be more rapidly color developed (up to 25 seconds) in the presence of a color developing solution containing a selectively diffusible color development photochemical such as a development inhibitor. Despite the shortened processing time, color balance within the three color records of such elements is maintained. The selectively diffusible color development photochemical has size and structure that enables it to have sufficient solubility in the color developing composition, and to selectively diffuse into the topmost red-sensitive emulsion layers of the processed color papers only.

Abstract: A silver halide color photographic material comprising a transparent support having thereon at least one blue-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer, at least one red-sensitive silver halide emulsion layer and at least one light-insensitive layer, wherein said red-sensitive silver halide emulsion layer contains at least one compound which releases a development inhibitor having a diffusion parameter of 0.3 or more upon reaction with the oxidation product of a color developing agent, and when development processing I and development processing II each defined in the specification are carried out, the gradients of yellow, magenta and cyan obtained by said two kinds of development processing satisfy the following conditions:0.8.ltoreq..gamma..sub.II (Y)/.gamma..sub.I (Y).ltoreq.1.20.8.ltoreq..gamma..sub.II (M)/.gamma..sub.I (M).ltoreq.1.20.8.ltoreq..gamma..sub.II (C)/.gamma..sub.I (C).ltoreq.1.2wherein .gamma..sub.I (Y), .gamma..sub.I (M), .gamma..sub.

Abstract: A development processing method comprises: exposing a silver halide light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer; and developing said exposed light-sensitive material with a developing solution, wherein at least one of said silver halide emulsion layer and other hydrophilic colloidal layers contains at least one hydrazine derivative, and wherein said developing solution is substantially free from a dihydroxybenzene compound, has a pH of from 9.0 to 10.5, and contains (1) at least one ascorbic acid derivative developing agent, (2) at least one aminophenol auxiliary developing agent and (3) a specific mercaptopyrimidine compound. The processing method provides a high-contrast image required in the field of graphic arts using a developing solution having no problem with respect to the ecosystem and working environment, without causing silver stain even at a low replenishment rate.

Abstract: Disclosed is a method of processing an exposed black and white photographic light-sensitive material employing an automatic processor, the method comprising the steps of developing the exposed material with a developer, the developer is replenished with a developer replenisher; fixing the developed material with a fixer; washing the fixed material; and drying the washed material, wherein the developer contains a developing agent, a compound represented by the following formula (III) and at least one of a compound represented by the following formula (I) and a compound represented by the following formula (II): ##STR1##

Abstract: A method for processing a silver halide photographic light-sensitive material is disclosed. The processing method comprises the step of (1) developing a silver halide photographic light-sensitive material which comprises a support having thereon a silver halide emulsion layer and a hydrophilic colloid layer adjoining with the silver halide emulsion layer, and at least one of the silver halide emulsion layer and the hydrophilic colloid layer contains a phosphazene compound and a compound represented by the following Formula 1 or 2 by a developing solution and (2) fixing the silver halide photographic light-sensitive material by a fixing solution, ##STR1## wherein R.sub.1 and R.sub.2 are each independently a hydroxyl group, a mercapto group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonyl group or an alkylthio group, and Z is a group of atoms necessary to form a 5- or 6-member ring, ##STR2## wherein R is an aryl group, R.sub.3, R.sub.4, R.sub.

Abstract: A developer for a silver halide photographic photosensitive material containing at least one of monocyclic dimercaptotriazine compounds, bis-type dimercaptotriazine compounds, mercapto-1,2,4-triazine compounds and dimercaptopyrimidine compounds, and a process for developing a silver halide photographic photosensitive material using the developer. The compounds of the present invention provides excellent effect in preventing silver stains without affecting the photographic properties of the photographic material.

Abstract: A method of accelerating black and white development comprising contacting a negative-type silver halide photographic element during processing with a developer prebath or a developer bath comprising an accelerator compound of the formula: ##STR1## is disclosed, wherein R.sub.1, R.sub.2, and R.sub.3 are substituents; said R.sub.1, R.sub.2, and R.sub.3 may further combine with each other to form a 5-, 6-, or 7-membered ring; and wherein said developer prebath and developer bath do not contain any iron(III) ion complex salt having bleaching activity.A bath selected from the group consisting of developer prebaths and developer baths for black and white development of a negative-type silver halide photographic element comprising an aqueous solution of accelerator compound of the formula: ##STR2## is also disclosed, wherein R.sub.1, R.sub.2, and R.sub.3 are substituents; said R.sub.1, R.sub.2, and R.sub.

Abstract: Compounds of the formula I are suitable as release compounds for photographically useful groups (photographic units). On reacting with nucleophilic reagents, preferably with dinucleophiles, the photographically useful group is released. ##STR1## In formula I: PUG means a photographically useful group;A means a strong electron acceptor;V means a vinylene group or two or more successive vinylene groups, wherein the vinylene group or two successive vinylene groups may form part of an aromatic ring system;L means one or more timing groups;m means 0 (zero) 1 or 2;n means 0 (zero), 1 or 2;R.sup.1 means H or methyl;R.sup.2 means H, alkyl with 1-18 C atoms or aryl;R.sup.3, R.sup.4 mean H or an organic group,wherein R.sup.2 and R.sup.3 may also together mean the residue necessary to complete a ring.

Abstract: Radiographic films can be processed using conventional developing agents, either in the films or in solution. The films also include from about 0.02 to about 1 mg/dm.sup.2 of thialkylene bis(ammonium salt). The solution used for development is replenished at a low rate with a chemical base as the sole developer replenishing agent. The chemical base maintains developer composition pH at from about 9 to about 11 and enables processing of films without the use of conventional developer replenishing solutions or replenishment rates.

Abstract: An information recording medium includes a transparent substrate, an interference layer formed on the transparent substrate, a recording layer formed on the interference layer, a reflective layer formed on the recording layer, and a coating resin formed on the reflective layer. The recording layer has a pit region and a mirror region. The reflectivity of the pit portion changes as a thickness of the recording layer changes. The reflectivity characteristic of the mirror region is selectively adjustable from that of the pit region within a range of thicknesses of the interference layer.

Abstract: An optical recording medium has a substrate, and a right absorbing layer serving as a recording layer formed of the substrate. The light absorbing layer contains a metallo-phthalocyanine compound of formula (I): ##STR1## wherein M is Mn, Fe, Co, Zn or Cd; and either A.sup.1 or A.sup.2, either A.sup.3 or A.sup.4, either A.sup.5 or A.sup.6, and either A.sup.7 or A.sup.8 is --OR group or --SR group in which R is a group including --N.dbd. or --N<, and the other is hydrogen.

Abstract: Disclosed is a method for developing a silver halide photographic light-sensitive material with a developer having a pH within the range of 9.5 to 10.7 through an automatic processor, wherein said silver halide photographic light-sensitive material comprises a support and thereon, at least one silver halide emulsion layer comprising silver halide grains containing at least 60 mol % of silver chloride, comprising the steps of:replenishing a first developer replenishing-solution having lower activity than a starter for a developer; andreplenishing a second developer replenishing-solution having the substantially same activity as said starter for a developer.

Abstract: A method for processing an imagewise exposed black-and-white negative silver halide photographic light-sensitive material comprising a support having provided thereon photographic layers including at least one silver halide emulsion layer, one of said photographic layers containing a hydrazine derivative, said method comprising;developing said light-sensitive material with a developer comprising a black and white developing agent and a compound represented by Formula VI, said developer having a pH of less than 11.5; ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are each independently hydrogen, --SM.sub.1, hydroxyl, alkoxyl having 1 to 5 carbon atoms, --COOM.sub.2, amino, alkyl having 1 to 5 carbon atoms, provided that at least one of R.sub.1, R.sub.2, and R.sub.3 is --SM.sub.1, and M.sub.1 and M.sub.2 are each independently hydrogen, alkali metal, or ammonium.

Abstract: A method of developing with developer an exposed black and white silver halide photographic light-sensitive material is disclosed, the developer containing a compound represented by the following Formula (1a) , (1b) , (2) or (3) and a compound represented by the following Formula (4) or (5): ##STR1##

Abstract: An alkaline, hydroquinone free, aqueous black-and-white radiographic developer comprising(a) an ascorbic acid developing agent;(b) a 3-pyrazolidone auxiliary developing agent;(c) an organic antifoggant;(d) a sulfite antioxidant;(e) a buffer;(f) a sequestering agent; and(g) A development accelerator selected from formulas I and II as follows: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 represent alkyl of 1 to 8 carbon atoms or R.sub.1, R.sub.2, and R.sub.3 taken together with N atom to which they are attached form a 6 or 7 membered ring and X represents a tosylate ion, halide, or BF.sub.4.sup.-.

Abstract: A method for processing silver halide photographic material is disclosed, which has a support thereon at least one silver halide emulsion layer and at least one protective layer provided over said emulsion layer in which each of the photographic materials contains colloidal silica in at least one emulsion layer and is at most 200% in the total swelling degree of the whole hydrophilic colloid layers provided on the side of said emulsion layer, and after optical exposure said photographic materials are developed with a developer adjusted to pH 9.5-12.0 and containing at least (1) a hydroquinone developing agent in a concentration of from 0.2 to 0.75 mole/l, (2) an auxiliary developing agent of 1-phenyl-3-pyrazolidone type and/or an auxiliary developing agent of p-aminophenol type in a concentration of from 0.001 to 0.06 mole/l, (3) free sulfite ions in a concentration of from 0.3 to 1.

Abstract: Development of silver halide photosensitive material with a developer containing a developing agent and a free sulfite is accompanied by deposition of silver sludge. Silver sludge is effectively suppressed by adding to the developer (a) a six-membered heterocyclic compound which has a six-membered ring containing two nitrogen atoms and has a mercapto group, a hydroxyl group and one or two substituents having 2 to 20 carbon atoms in total or (a') a six-membered heterocyclic compound which has a six-membered ring containing three nitrogen atoms and has a mercapto group and a hydroxyl group.

Abstract: The present invention provides a photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) as specified in the claims capable of image-wise releasing sulphide or a sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver. The present invention further provides a method for obtaining an image and a lithographic printing plate with said photographic material.

Abstract: The present invention provides a photographic material comprising on a support (i) photosensitive silver halide particles, (ii) substantially light insensitive silver salt particles having a speed at least a factor 10 less than said photosensitive silver halide particles under the same conditions of exposure and development of said photosensitive silver halide particles and (iii) a releasing compound capable of image-wise releasing under the conditions for image-wise development of said photosensitive silver halide to silver a chemical sensitizer, said chemical sensitizer rendering said substantially light insensitive silver salt particles developable. The present invention also provides a method for making an image therewith and a method for making a lithographic printing plate.

Abstract: There are described photographic elements containing novel release compounds which release a blocked photographically useful group, such as a blocked development inhibitor. The blocking group is removed during processing as a result of reaction with sulfite ion contained in one of the processing baths.

Abstract: Disclosed is a silver halide photographic material comprising a compound represented by the general formula (I), (II), or a salt thereof or a compound represented by the general formula (III), with these groups being defined as in the specification: ##STR1## also disclosed is a method for the processing of a silver halide photographic material, which comprises processing a silver halide photographic material in the presence of a compound represented by the general formula (I) or (II) or a salt thereof or a compound represented by the general formula (III).

Abstract: A novel silver halide photographic light-sensitive material having at least one silver halide photographic emulsion layer coated on at least one side of a support, wherein said photographic emulsion layer comprises a light-sensitive silver halide emulsion and said photographic emulsion or other layer(s) comprises a substantially light-insensitive, unfogged silver halide fine grain emulsion, with a heterocyclic mercapto compound represented by the following general formula (I) being adsorbed on the fine grains in said emulsion: general formula (I) ##STR1## wherein X represents --O--, --NH--, or --S--; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are a hydrogen atom or a substituent group; at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a substituted or unsubstituted alkyl or aryl group having up to 13 carbon atoms, such alkyl or aryl being bonded directly or through a divalent linkage group to the aromatic nucleus; X.sub.

Abstract: Disclosed is a method for the development of a silver halide light-sensitive black and white material, wherein a silver halide light-sensitive material is developed in the presence of at least one compound represented by the following general formula (I): ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, an ammonium group or a group which is cleaved under alkaline conditions; L represents a bivalent organic group comprising an alkylene group, an alkenylene group, an ether group, a thioether group, --CO--, --CS-- or --NR-- (wherein R represents a hydrogen atom or an alkyl group) alone or a combination of two or more of them; X represents an amino group, an ammonio group, a hydroxyl group or a heterocyclic group; and n represents 0 or 1.

Abstract: A new class of photographic stabilizers is prepared and their use in photographic materials is disclosed. These compounds are 1-phenyl-3-pyrazolidinone derivatives corresponding to following general formula: ##STR1## wherein: A represents a group capable of adsorbing at the surface of silver halides;L is a divalent linking group and r is 0 or 1;R1 and R2 each represent hydrogen, lower alkyl or substituted lower alkyl.The photographic materials containing the substances of the invention are preferably DTR mono-sheet elements which after processing can serve as planographic printing plates.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive layer comprising a silver halide emulsion sensitized by an infrared sensitization dye, wherein the silver halide in the silver halide emulsion contains at least 90 mol % of silver chloride and is constituted by monodisperse grains having a coefficient of variation of not more than 20%; and an image formation method using the above-described silver halide photographic photosensitive material, comprising the steps of imagewise exposing the photographic material and developing the said material in a developing solution containing at least 0.15 mol/l of sulfurous acid ions and a compound having a silver halide-adsorption accelerating group.

Abstract: 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.

Abstract: A negative-type silver halide photographic material is disclosed, which comprises a support having provided thereon at least one hydrophilic colloid layer, at least one of which is a silver halide emulsion layer, wherein the hydrophilic colloid layer contains:(a) a compound represented by formula (I): ##STR1## wherein, A.sub.1 and A.sub.2 both represent hydrogen atoms, or one represents a hydrogen atom and the other a sulfonyl group or an acyl group, R.sub.1 represents an aliphatic group, an aromatic group or a heterocyclic group, G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, ##STR2## wherein R.sub.2 is an alkoxy group or an aryloxy group, a ##STR3## group, or an iminoethylene group, X.sub.1 is a moiety which instigates a ring-forming reaction by cleaving the --G.sub.1 --X.sub.1 moiety from the residual molecule and forming a cyclic structure containing the atoms of the --G.sub.1 --X.sub.

Abstract: A method for the formation of direct positive color images wherein after image-wise exposure of a direct positive color photosensitive material which comprises at least one internal latent image type silver halide emulsion layer which has not been pre-fogged and color image forming couplers on a support, the material is subjected to development after and/or during a fogging process, the development process being carried out using a development bath which contains at least one N-hydroxylalkyl substituted p-phenylenediamine derivative in the presence of at least one compound of general formula [I] and/or [II] as indicated below: ##STR1## wherein Q represents the group of atoms required to form a five- or six-membered heterocyclic ring, which heterocyclic ring may be condensed with a carbon aromatic ring or a heterocyclic aromatic ring,Y represents a divalent linking group consisting of at least one atom selected from the group consisting of, carbon atom, nitrogen atom, oxygen atom, sulfur atom, and R represents

Abstract: There is disclosed a method for processing a light-sensitive silver halide color photographic material, characterized in that the light-sensitive silver halide color photographic material contains a core-shell type-internal latent image type silver halide emulsion a shell of which contains at least silver chloride, and the light-sensitive silver halide color photographic material is processed with a color developing solution containing the compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms which may have a substituent or substituents, or R.sub.1 and R.sub.2 may be combined to form a ring, provided that the case where R.sub.1 and R.sub.2 are hydrogen atoms at the same time is excluded.

Abstract: A method for processing a black-and-white photosensitive material comprising the steps of:(a) exposing a silver halide photosensitive material having been spectrally sensitized with a sensitizing dye;(b) developing the exposed material;(c) fixing the developed material; and(d) thereafter at least one step selected from washing the material and stabilizing the material;at least one of the fixing, washing and stabilizing steps being performed in the presence of at least one compound represented by formula (I) or (II) or a salt thereof; ##STR1## wherein A represents an atomic group necessary for forming a saturated or unsaturated 3-membered to 8-membered ring comprising at least one hetero atom selected from an oxygen atom, a nitrogen atom, a sulfur atom and a selenium atom; and M represents a hydrogen atom or a counter cation; andX--(R.sub.1 --S).sub.n --R.sub.2 --S--R.sub.3 --Y (II)wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents an alkylene group; R.sub.1 and R.sub.

Abstract: Method of processing photographic silver halide material wherein an imagewise release of the development inhibitor 1-aryltetrazole-5-thiol is achieved during processing.

Abstract: The present inventions relate to a processing method for processing, with a developing time of not more than 180 seconds, a silver halide color photographic light-sensitive material comprising a support, provided thereon, with at least one silver halide emulsion layer, and at least one emulsion layer containing silver iodo-bromide with not less than 0.5 mole% of silver iodine, in particular to an active processing method wherein, a light-sensitive material B not only containing silver iodo-bromide with an iodine content of not less than 0.5 mole% but also a magenta coupler and providing a maximum magenta density, after exposed, and being capable of only satisfying the maximum magenta dye density M of M<2.0 if exposed under specific conditions and then subjected to color developing of a duration of three minutes 15 seconds at 38.degree. C. with a specific developer solution, is capable of offering a maximum magenta density satisfying M.gtoreq.2.

Abstract: 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.

Abstract: Silver halide photographic elements are described containing, as a bleach accelerator precursor, a silver salt of an acid-containing, non-zwitterionic, organic thiol. The bleach accelerators are operable with a multiplicity of bleach compositions and help in reducing sensitizing dye stain.

Abstract: The present invention provides a method for photographic processing of a silver halide photographic light-sensitive material with high sensitivity and with less fog. This method comprises imagewise exposing a silver halide photographic light-sensitive material and then developing the exposed light-sensitive material in the presence of at least one compound selected from the group consisting of the compounds represented by the following formulas (I)-(IV): ##STR1## wherein Z represents a group of atoms necessary to form a condensed aromatic ring which may have a substituent in addition to ##STR2## R represents a hydrogen atom or a monovalent organic group, R.sub.1 represents a hydrogen atom or a substituted or unsubstituted alkyl group and X represents an oxygen atom, a sulfur atom, a selenium atom or >N--R.sub.2 wherein R.sub.

Abstract: The present invention relates to a process for forming a direct positive color image, wherein bleaching time is reduced and color reproduction is not deteriorated. According to the present invention, there is provided a process for forming a direct positive color image comprising exposing a photosensitive material comprising, on a support, at least one photographic emulsion layer containing previously unfogged internal latent image-type silver halide grains and a color image-forming coupler, color-developing the same in the presence of a nucleating agent and/or fogging light, and then processing it with a processing solution having a bleaching effect, characterized in that a bleaching accelerator is incorporated into the processing bath having the bleaching effect or a pre-processing bath, or said bleaching accelerator is incorporated into the photosensitive material.

Abstract: A silver halide photographic material, which contains at least one blocked photographic reagent having in the molecule thereof at least one group selected from ##STR1## group and capable of releasing a photographically useful reagent by cleavage of the --N--C--bond by a nucleophilic attack of a nucleophilic reagent on the carbonyl group and a subsequent intramolecular electron transfer reaction or intramolecular nucleophilic reaction and which has at least one photosensitive silver halide emulsion layer, is photographically processed in the presence of an amine. A photographic material which includes, in combination, a photographic reagent precursor capable of releasing a photographically useful reagent timely on photographic processing and a photosensitive silver halide emulsion layer is provided along with a method of processing the photographic material.

Abstract: A process for forming a superhigh contrast negative image with a stable developer is disclosed, which comprises development processing a silver halide photographic material in the presence of a compound of formula (I) and a compound of formula (II) as defined in the specification.

Abstract: Silver halide photographic elements are described containing, as a bleach accelerator precursor, a silver salt of a solubilized, non-primary amino thiol. The bleach accelerators are operable with a multiplicity of bleach compositions and do not deleteriously affect the sensitometric properties of the photographic element.

Abstract: A developer for developing a silver halide light-sensitive material and an image forming method using the developer are disclosed. The developer contains a compound represented by the following formula I or II and a compound containing a thioether group. ##STR1## wherein Y, Y.sub.1 and Y.sub.2 are each a hydrogen atom or a mercapto group, and R and R.sub.1 are each a substituent. A silver halide light-sensitive material containing silver halide grains comprising not less than 50 mol % of silver chloride and have a ratio of (100) surface and (111) surface of not less than 5 is preferably used in the image forming method. Developing speed and sensitivity of light-sensitive material can be rised by use of the developer.