Abstract: The invention is generally accomplished by providing a method of finishing an emulsion comprising providing silver halide grains, adding to said emulsion in an amount between about 0.005 mmol/per mole of silver and 0.10 mmol/per mole of silver of the compound ##STR1## X=O, S, Se; R.sub.1 =alkyl or substituted alkyl or aryl or substituted aryl;Y.sub.1 and Y.sub.2 individually represent hydrogen, alkyl groups or an aromatic nucleus or together represent the atoms necessary to complete a cyclic structure containing carbon, oxygen, selenium, or nitrogen atoms necessary to complete a fused aromatic nucleus or an alicyclic structure. The invention also provides a photographic element comprising the silver halide emulsion. In a preferred embodiment, the R.sub.1 substituent is methyl or phenyl.

Abstract: A silver halide photographic material is described, which comprises a hydrazine derivative represented by the following formula (I) and a surface active compound represented by the following formula (II): ##STR1## and wherein the substituents are defined in the specification. An image formation method using the silver halide photographic material is also described.

Abstract: A process is disclosed for preparing a photographic emulsion utilizing an alkynylamine compound as a grain growth modifier. Specifically, the present invention provides a process of preparing a photographic emulsion comprising:introducing silver ions, halide ions and a grain growth modifier having the structure ##STR1## wherein z represents atoms necessary to complete a five to nine-membered heterocyclic ring system, R.sup.1, R.sup.2 and R.sup.3 independently represent hydrogen or a lower alkyl of from 1 to 5 carbon atoms, and R.sup.4 represents hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, which may be substituted or unsubstituted, into a dispersing medium containing silver halide seed grains; andmaintaining the dispersing medium containing the seed grains, silver ions, halide ions and grain growth modifier at a pH in the range from about 4.5 to about 10, and a pAg in the range from about 6.0 to about 9.5.

Abstract: A method of making a silver halide emulsion comprising precipitating and chemically sensitizing the emulsion and further comprising adding to the emulsion a fused dihydropyrimidine compound represented by the following formula: ##STR1## wherein X is O, S or Se; R is a substituted or unsubstituted alkyl or aryl group; andZ contains the atoms necessary to form an aromatic group, a heteroaromatic group or a heterocyclic group and a silver halide emulsion made by this method.

Abstract: There is disclosed a silver halide photographic light-sensitive which is capable of providing a rapid processing as well as a high sensitivity and in which a change in an aging time in exposing through processing provides less performance fluctuation and therefore an excellent stability.

Abstract: A method for producing silver halide photographic light-sensitive material is disclosed. The method comprises the steps of (1) forming silver halide crystal nuclei, (2) growing the nuclei to form a silver halide emulsion, (3) chemically sensitizing the silver halide emulsion with a selenium compound, and (4) coating and drying the silver halide emulsion on a support, and a compound represented by formula I is added to the silver halide emulsion during the time between the moment of completion of the nuclei forming step and the moment of completion of the chemically sensitizing step. ##STR1## In the formula R.sub.1 is a hydrogen atom, a straight or branched alkyl group, a cycloalkyl group, an alkenyl group, an aralkyl group, an alkoxyl group, an aryl group, a heterocyclic group, a carbamoyl group, a thiocarbamoyl group or a sulfamoyl group; R.sub.2 and R.sub.

Abstract: Post-processing stabilizers for photothermographic, silver imaging media are disclosed. The stabilizers are represented by the following general formulae: ##STR1## wherein: R.sup.1, R.sup.2, and R.sup.3 are independently H, halogen, an alkyl group, an alkoxy group, a thioalkyl group, a cycloalkyl group, a perhalogenated alkyl group, or taken together form a cycloaliphatic group.Compounds of formula (I) may be used as stabilizer precursors in photothermographic silver imaging media to provide post-processing stability without significantly adversely affecting desired properties of the photothermographic material.

Abstract: A compound having a nucleus of the formula: ##STR1## The compounds are suitable for use as image stabilizers and antifoggants in photothermographic materials and exhibit acceptably low sensitization of human skin.

Abstract: Heat-developable photographic recording materials comprising (a) at least one binder layer coated on a support, the binder layer containing at least one light-sensitive silver halide and a light-insensitive silver salt of a fatty acid; and in the binder layer or in another layer in reactive relationship to the binder layer (b) at least one reducing agent and (c) a stabilizer selected from the group of hexamethylene tetramine and salts thereof, triazaadamantane and salts thereof, and compounds that can be derived from hexamethylene tetramine by exchanging one or more --CH.sub.2 -- groups with --S--, --SO--, or --SO.sub.2 -- provide excellent stability during storage and can be manufactured easily and inexpensively and which presents minimal environmental or health risks.

Abstract: A silver halid photographic emulsion contains an antioxidizing agent.

Abstract: A compound represented by Formula IMO.sub.2 S--Z--SO.sub.2 SM.sup.1 (I)wherein Z is a non-metallic arylene, alkylene or heterocyclic group, and M and M.sup.1 are independently cationic counter ions and the use of said compound in a silver halide photographic element comprising a silver halide emulsion which is greater than 50 mole % silver chloride.

Abstract: A silver halide photographic material contains light-sensitive silver halide grains which are contained contained in a silver halide emulsion layer and which have been selenium sensitized. The silver halide emulsion layer also contains at least one compound represented by the following formula (I): ##STR1## The variables in the formula are defined in the specification.

Abstract: A silver halide emulsion containing at least one member of methine dyes represented by the following general formula (I): ##STR1## wherein MET represents an atomic group having a methine dye structure; Q represents a bivalent bonding group comprising at least one atom of carbon atom, nitrogen atom, sulfur atom and oxygen atom or an atomic group having at least one atom of carbon atom, nitrogen atom, sulfur atom and oxygen atom; Ar represents a group which has an aromatic character and derives from a polycyclic compound composed of 8 or more atoms excluding nitrogen atom; l.sub.1 represents 1 or 2; l.sub.2 represents 0 or 1; and l.sub.3 represents 1, 2, 3 or 4.

Abstract: A silver halide photographic element comprising a silver halide emulsion in reactive association with a compound of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently an aryl, alkyl or arylalkyl group; and wherein Z represents the atoms necessary to form a 5 or 6 membered heterocyclic ring and contains at least one atom selected from N, O, S, and Se; and methods of making same.

Abstract: Emulsions having an improved sensitivity/grain ratio are obtained when a silver halide emulsion containing up to 20 mol % of AgI is prepared by the precipitation of a silver halide emulsion A containing up to 100 mol % of AgI and the addition of a silver halide emulsion B which contains up to 40 mol % of AgI, has an average grain size of at most 0.25 .mu.m and is always more soluble in aqueous gelatine solution than emulsion A either due to its grain size or due to its iodide content, this being carried out in the presence of at least two compounds selected from imidazole, histidine (.alpha.-amino-.beta.

Abstract: There are disclosed an internal latent image type direct positive light-sensitive emulsions having improved spectral sensitization performance, and chemical sensitization performance, and color diffusion transfer photographic film units in which said emulsions are used. The emulsions are prepared by subjecting a silver halide grain, which forms an internal nucleus, to chemical sensitization, in the presence of an organic silver halide solvent, and adding a solid adsorbing agent, before finishing the formation of an outer shell silver halide phase, to remove a part or all of the silver halide solvent, wherein the emulsions may further contain a tabular silver halide grain having an average grain diameter of at least 0.3 .mu.m and a ratio of an average grain diameter to an average grain thickness of 2 or more, based on 50% or more of the total silver halide grains.

Abstract: An internal latent image type positive silver halide emulsion has improved sensitivity reduction in low illuminance exposures. A color diffusion transfer light-sensitive material incorporates the emulsion and has reduced sensitivity reduction. The internal latent image type positive silver halide emulsion is prepared using a polymer having a repetitive unit derived from an ethylenically unsaturated monomer having at least one thioether structure on a side chain as a deflocculating agent to form silver halide grains and subjecting the grain surfaces to a chemical sensitization in the presence of a polymer having a repetitive unit represented by the following Formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituted or unsubstituted alkyl group and Q represents a group selected from the group consisting of groups represented by the following Formula (1) to Formula (4): ##STR2## wherein q represents an integer of 2 to 4; ##STR3## wherein R.sup.2 and R.sup.

Abstract: A grain growth process is disclosed for providing an ultrathin tabular grain emulsion in which the average equivalent circular diameter of tabular grains is increased. An aqueous dispersion is provided containing high bromide grains having an average thickness of less or equal to that of the ultrathin tabular grains to be produced, the dispersion having a pH in the range of from 2 to 8 and a limited stoichiometric excess of bromide ions. An 8-hydroxyquinoline that contains at least one iodo substituent is introduced into the dispersing medium as a grain growth modifier. The aqueous dispersion containing the iodo-8-hydroxyquinoline grain growth modifier is held at 40.degree. C. or a convenient higher temperature until greater than 50 percent of total grain projected area is accounted for by ultrathin tabular grains having {111} major faces of a higher average equivalent circular diameter than the starting grains and an average aspect ratio of at least 5.

Abstract: A silver halide photographic element comprising a silver halide emulsion which is greater than 50 mole % silver chloride, said emulsion being in reactive association with a sulfur donating compound and a phosphine compound represented by Formulae I and II, and polymers having a repeating unit derived from the compounds of Formula I,Formula (I) R.sup.18 R.sup.19 R.sup.20 PFormula (II) R.sup.21 R.sup.22 P--A--PR.sup.23 R.sup.24wherein R.sup.18, R.sup.19, R.sup.20, R.sup.21, R.sup.22, R.sup.23, and R.sup.24 are independently alkyl, or aryl groups, or R.sup.18, R.sup.19, R.sup.20, R.sup.21, R.sup.22, R.sup.23, and R.sup.24 may combine to form a 5 or 6-membered ring , and wherein A is a divalent carbon linking group, and a method of making the silver chloride emulsion.

Abstract: A silver halide photographic material comprises at least one light-sensitive emulsion layer containing a silver halide emulsion on a support. The light-sensitive emulsion layer comprises (a) a silver halide emulsion containing silver halide grains having a silver chloride content of 90 mol % or more, in some cases 95 mol % or more, and (b) at least one compound represented by formula (I), (II) or (III): ##STR1## in which the variables are as defined in the specification. In some embodiments of the invention, the silver halide emulsion (a) may be sensitized with a selenium, gold or iridium compound. Also, in some embodiments of the invention, the silver halide grains are substantially iodide-free and have a localized phase with a silver bromide content of 10% or more in the vicinity of the grain surface.

Abstract: A silver halide photographic light sensitive material comprising a support bearing thereon at least one silver halide emulsion layer and a backing layer on the back side of the support, wherein; the backing layer contains a compound represented by Formulas [1] or [2]; at least one of the hydrophilic colloidal layers including the silver halide emulsion layer contains a polymer latex stabilized with gelatin; and the outermost layer on the side of the layers including the silver halide emulsion layer or the outermost layer on the opposite side of the layers thereof contain a fluorine-containing anionic or cationic surfactant(s).

Abstract: A silver halide photographic emulsion comprising a hydrophilic colloid binder, negative-acting silver halide grains, a hydrazine, and a contrast-promoting amount of a compound selected from the group consisting of 3-indazolinones, 4(3H)-pyrimidones, urazoles, 2-pyrazolin-5-ones, and 3-pyrazolin-5-ones.

Abstract: The present invention relates to water soluble photographic sensitivity increasing alkynylamine compounds. It also relates to photographic elements containing such compounds.

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: The invention is accomplished by providing a combined process of chemical and spectral sensitization comprising providing a silver halide emulsion, adding a sulfur or gold chemical sensitizer, adding a finish modifier ##STR1## wherein X is --O--, --S--, --Se--, ##STR2## Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus or together represent the atoms completing a fused aromatic nucleus; R is hydrogen or lower alkyl of from 1 to 5 carbon atoms; and R.sub.1 is a hydrogen or methyl, provided that Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus when R.sub.1 is hydrogen, adding dye, andadding a hydrolyzable quaternized chalcogenazolium salt of a middle chalcogen,heating to a temperature sufficient to cause sensitization of said silver halide to take place, and cooling to recover the sensitized emulsion.

Abstract: A silver halide photographic light-sensitive material comprises a support and provided thereon, a silver halide emulsion layer containing silver halide grains and a macrocyclic compound in an amount of 1.times.10.sup.-6 to 1.times.10.sup.-1 mol per mol of silver, said macrocyclic compound comprising a 9- or more-membered ring containing at least one of a nitrogen atom, an oxygen atom, a sulfur atom and a selenium atom, and said silver halide grains having a silver chloride content of not less than 90 mol % and containing at least one metal selected from the group consisting of metals of VIB group, VIIB group, VIII group, IIB group, IIIA group and IVA group from the Periodic Table.

Abstract: A process is disclosed of preparing a high chloride {111} tabular grain emulsion. Tabular grains are formed having {111} major faces, containing at least 50 mole percent chloride and less than 5 mole percent iodide, based on silver, and accounting for at least 50 percent of total grain projected area by introducing silver ion into a gelatino-peptizer dispersing medium containing a stoichiometric excess of chloride ions with respect to silver ions and an iodo-substituted 8-hydroxyquinoline, which acts as a grain growth modifier.

Abstract: The present invention provides a photographic element comprising a support having thereon a silver halide emulsion layer. The emulsion layer contains an organic compound having a thiosulfonic acid substituent, an organic compound having a sulfinic acid substituent, and an alkynylamine.

Abstract: A silver halide photographic emulsion comprises silver halide grains to which an iridium compound was added during a preparation process. At least 5% by number of said silver halide grains have at least one intrafacial epitaxy limited in the neighborhood of the corners of a major plane of the grain, and the thickness of said epitaxy is 0.1 .mu.m or less.

Abstract: Certain poly(lactic acid) and poly(glycolic acid) polymers or copolymers, and certain carbonates, lactones, lactates, lactylates, lactides, glycolates, glycolylates, and glycolides have been found to stabilize thermal-dye-bleach constructions containing a dye in association with a thermally-generated-bleaching agent. Preferably, the thermally-generated-bleaching agent is a thermal-carbanion-generating agent such as a quaternary ammonium salt of a phenylsulfonylacetic acid or a thermal-nucleophile-generating agent such as an ammonium salt of a phenylsulfonylacetic acid. These materials have been found to be particularly effective when used in acutance and antihalation systems for photothermographic and photographic elements.

Abstract: A silver halide photographic material comprises a silver halide emulsion layer provided on a support. The silver halide emulsion layer contains a heterocyclic selenium or tellurium compound represented by the formula (Ia), (Ib), (Ic) or (Id): ##STR1## in which each of Ch.sup.1, Ch.sup.3, Ch.sup.6 and Ch.sup.12 is Se or Te; and each of Ch.sup.2, Ch.sup.4, Ch.sup.5, Ch.sup.7, Ch.sup.8, Ch.sup.9, Ch.sup.10, Ch.sup.11, Ch.sup.13, Ch.sup.14 and Ch.sup.15 is O, S, Se or Te. Other selenium or tellurium compounds are also disclosed.

Abstract: Disclosed is a silver halide color photographic photosensitive material in which the spectral sensitivity in the green short wavelength region is increased and which has excellent storage stability. The photosensitive material is sensitized by a selenium sensitizer represented by formula (I). Also, a green light sensitive photosensitive silver halide emulsion layer has been spectrally sensitized with a sensitizing dye represented by formula (II).

Abstract: The present invention relates to a photographic element comprising a silver halide emulsion, the emulsion comprising silver halide grains which contain an alkynylamine dopant. The presence of the alkynylamine dopant imparts to the photographic element the advantageous characteristic of increased sensitivity.

Abstract: A silver halide photographic emulsion improved in low-intensity reciprocity law failure is provided, in which the silver halide emulsion contains silver halide grains having thereon chemical sensitization nuclei produced during chemical sensitization wherein the nuclei substantially consist of at least two groups of chemical sensitization nucleuses, the groups having different nucleus-size frequency distributions from each other.

Abstract: A method for processing a first black-and-white silver halide photographic light-sensitive material comprising a hydrazine compound and a second black-and-white silver halide photographic light-sensitive material comprising a tetrazolium compound is disclosed, a photographic layer on the side of a silver halide emulsion layer of each material containing gelatin in an amount of not more than 3.0 g per m.sup.2 of the material, and the process comprising the step of exposing the light-sensitive materials and developing the exposed materials with the same developer having a pH of from 9.5 to 10.7, the developer being replenished with developer replenisher in an amount of not more than 250 cc per m.sup.2 of the light-sensitive materials to be developed.

Abstract: A silver halide photographic material having photographic constituent layers on a support, which photographic material is characterized in that at least one of said photographic constituent layers is a silver halide emulsion layer, at least 50% in number of the light-sensitive silver halide grains in said silver halide emulsion layer being grains that contain at least 60 mol % of silver bromide, and at least one of said photographic constituent layers containing at least one of the compounds represented by the following general formula (I):[HlAu.sub.m (L).sub.n (X).sub.p ].sub.q (I)where L is a 1igand in a 5- or 6-membered hetero ring; X is an anionic group; l is an integer of 0-2; m is an integer of 1 or 2; n is an integer of 1-3; p is an integer of 0-3; and q is an integer of 1-4.

Abstract: A photothermographic material comprising photographic silver halide, a reducible silver source, a reducing agent for silver ion and a binder, and as an antifoggant and/or stabilizer, a compound of the formula (I): ##STR1## wherein R is a member selected form the group consisting of a hydrogen atom, an alkyl group, an aryl group and a heterocyclic group.

Abstract: The present invention is a heat developed, photothermographic element comprising a support bearing at least one photosensitive, image-forming photothermographic emulsion layer comprising:(a) a photosensitive silver halide;(b) a non-photosensitive, reducible silver source;(c) a reducing agent for silver ions;(d) a binder; and(e) a substituted hydroxyphenyl compound which provides antifoggant and print stabilizing properties to the photothermographic element. The substituted hydroxyphenyl compound may be of the formula: ##STR1## wherein: R represents hydrogen, benzoyl, a five or six membered heterocyclic ring system, or a fused ring system; or of the formula ##STR2## wherein: R.sup.1 represents a disubstituted or a trisubstituted s-triazine group, a disubstituted benz-bis-triazole group, a disubstituted benz-bis-thiazole group, a disubstituted benz-bis-oxazole group, and a disubstituted benz-bis-imidazole group.

Abstract: A direct positive silver halide photographic material and a method for forming a high contrast image using the same are disclosed, in which a pre-fogged direct positive silver halide emulsion layer contains a salt of a nitrogen-containing compound having at least one pyridine nucleus and at least one pyridinium nucleus. The photographic material, after imagewise exposure, is developed with an alkaline developer containing a developing agent, preferably a reductance compound. The photographic material provides high contrast characteristics having a gamma exceeding 10.

Abstract: Color photographic materials and methods employ a substrate bearing a silver chloride emulsion. The silver chloride emulsion includes a diamino disulfide and a sulfinate. The diamino disulfide and the sulfinate are included in a weight ratio of from about 1:1 to about 1:20, and provide improved storage stability and reduced high temperature sensitivity during exposure.

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: A silver halide photographic material has on a support at least one light-sensitive silver halide emulsion layer which comprises silver halide emulsion grains having a chloride content: of at least 50 mol % and containing a metal selected from rhodium, ruthenium and rhenium in an amount of at least 10.sup.-8 mole per mole of silver, said silver halide emulsion being spectrally sensitized with a compound of general formula (I) and being chemically sensitized with a selenium or tellurium compound: ##STR1## wherein Z and Z.sub.1 each represents a group of nonmetallic atoms necessary to complete a 5- or 6-membered nitrogen-containing heterocyclic nucleus; R and R.sub.1 each represents an unsubstituted or substituted alkyl group, or an unsubstituted aryl group; Q and Q.sub.1 each represents a group of atoms necessary to complete a 4-thiazolidinone, 5-thiazolidinone or 4-imidazolidinone nucleus; L, L.sub.1 and L.sub.2 each represents an unsubstituted or substituted methine group; n.sub.1 and n.sub.

Abstract: A silver halide photographic material comprises a silver halide emulsion layer provided on a support. In the photographic material of the present invention, the silver halide emulsion layer contains a tellurium compound represented by the formula (I) or (II): ##STR1## in which each of R.sup.11 and R.sup.12 is --OR.sup.13, --NR.sup.14 R.sup.15, --SR.sup.16 or hydrogen; R.sup.11 and R.sup.12 may be combined with each other to form a heterocyclic ring; each of R.sup.21 and R.sup.22 is an alkyl, alkenyl, alkynyl, aralkyl, aryl or heterocyclic group, --OR.sup.23, --NR.sup.24 R.sup.25, --SR.sup.26 or hydrogen; R.sup.21 and R.sup.22 may be combined with each other to form a heterocyclic ring; each of X.sup.1 and X.sup.2 is oxygen, sulfur or .dbd.NR.sup.17 ; each of X.sup.3 and X.sup.4 is oxygen, sulfur or .dbd.NR.sup.27 ; each of R.sup.13, R.sup.14, R.sup.15, R.sup.16, R.sup.17, R.sup.23, R.sup.24, R.sup.25, R.sup.26 and R.sup.27 is an alkyl, alkenyl, alkynyl, aralkyl, aryl or heterocyclic group or hydrogen; R.sup.

Abstract: Radiation sensitive thermally developable imaging elements comprise:(a) photosensitive silver halide,(b) light insensitive silver salt oxidizing agent,(c) reducing agent for silver ions, and(d) an antifoggant compound comprising s-triazines having at least one tribromomethyl substituent. The antifoggants are effective in reducing spurious background image densities.

Abstract: A silver halide photographic material which contains at least one compound represented by the following general formula (I) in at least one silver halide photographic emulsion layer or one hydrophilic colloid layer, whereby achieving high Dmax and low Dmin: ##STR1## wherein T, U, V, and W each represents CH or N; R.sup.1 represents a substituent group; R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents a hydrogen atom or a substituent group, provided that at least one among the substituents of R.sup.2 to R.sup.6 represents a group to be eliminated in the form of R.sup.m --H (m=an integer from 2 to 6) under an alkaline condition; X represents a counter ion for adjusting the charge balance; n represents the number of counter ions necessary to adjust the charge balance; and further, any pair of adjacent groups among the substituents from R.sup.1 to R.sup.6 may combine with each other to form a ring.

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: A heat developable photosensitive material is disclosed, comprising a support having thereon at least one photosensitive silver halide emulsion layer which contains (i) at least one compound selected from among the compounds represented by formulae (I) and (III) and (ii) a dye compound represented by formula (LI): ##STR1## the definition of Y, R, R', M, T, U, n, m and for formula (I) and (III) and Y, Z and n for dye of formula (LI) are as defined in the specification.

Abstract: A method of producing an image comprising processing an imagewise exposed silver halide photosensitive material comprising a support having thereon a silver halide emulsion layer containing a silver halide sensitized with a selenium sensitizer in a black-and-white developer which contains a chelate complex salt of a transition metal. In a preferred embodiment, an electric current is passed through the developer to remove halide ions therefrom and to regenerate (reduce) the metal complex. A protective layer may be provided on the silver halide emulsion layer having a thickness of 0.6 .mu.m or less.

Abstract: A silver halide color photographic photosensitive material which has been spectrally sensitized to light of wavelengths greater than of about 670 nm in which are highly sensitive to light of wavelength greater than about 670 nm and sufficiently insensitive to visible light having a shorter wavelength. The photosensitive materials comprises a silver halide photosensitive layer containing the yellow coupler, a silver halide photosensitive layer containing a magenta coupler, a silver halide photosensitive layer containing a cyan coupler and at least one non-photosensitive hydrophilic layer. Each of the photosensitive layers are spectrally sensitized such that they have different peak spectral sensitivities at light wavelengths greater than about 670 nm.

Abstract: A silver halide photographic material comprises a silver halide emulsion layer and a non-light-sensitive hydrophilic colloidal layer provided on a support. The silver halide emulsion layer or the hydrophilic colloidal layer contains a selenium compound represented by the formula (I), (II) or (III): ##STR1## in which R.sup.11 is an aliphatic, aromatic or heterocyclic group, --OR.sup.13 or --NR.sup.14 R.sup.15 ; each of R.sup.13, R.sup.14 and R.sup.15 is hydrogen or an aliphatic or aromatic group; Ch is S, Se or Te; R.sup.12 is an aliphatic, aromatic or heterocyclic group or --COR.sup.16 ; each of R.sup.16, R.sup.21 and R.sup.31 has the same meaning as that of R.sup.11 ; M.sup.1 is Ge, Sn or Pb; M.sup.2 is Ni, Pd or Pt; each of R.sup.22 and R.sup.32 is an aliphatic or aromatic group; and each of n and m is 1 or 2.