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: Photothermographic elements of the photothermographic type may be sensitized to the infrared with sensitizing dyes of the formula: ##STR1## wherein: R.sup.1 represents a (CH.sub.2).sub.n --COO.sup.- group of from 1-20 carbon atoms, or an alkyl group of from 1 to 20 carbon atoms; andn is an integer from 1 to 20.

Abstract: The inclusion of isothiouronium functionality onto hydrazide derivatives results in the formation of nucleating agents for lithographic films that produce high contrast and speed with excellent dot quality as required for halftone applications. The level of performance of the nucleators of the invention is sufficiently high that the need to incorporate amine boosters in the lithographic film elements or developers is not required. The novel nucleators have the formula ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.10 alkyl, substituted or unsubstituted carbamoyl, or alkoxy or aryloxy carbonyl; Y is substituted or unsubstituted divalent aryl, and Q is an isothiouronium salt moiety.

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: In a silver halide color photographic photo-sensitive material comprising a reflective support having thereon photographic structural layers comprising one or more photo-sensitive silver halide emulsion layers, pH of a coating of the silver halide color photographic photo-sensitive material ranges from 4.0 to 6.5. The photo-sensitive silver halide emulsion layer contains a mercapto heterocyclic compound and silver halide grains, each comprising silver chlorobromide or silver chloride and containing substantially no silver iodide. The silver halide grains are formed in the presence of a specific grain growth controlling agent. The silver halide grain contains a metal complex of Ir.

Abstract: A silver halide color photographic photosensitive material comprises a reflective support having thereon at least one photosensitive silver halide emulsion layer. The reflective support comprises a base paper and two or more water-proof resin layers laminated on one surface of the base paper at the side to be coated with the photosensitive emulsion. The water-proof resin layers have different contents of a white pigment. The base paper has pH of from 5 to 9. The silver halide emulsion layer contains silver halide emulsion having a silver chloride content of 95% by moles or higher and being sensitized with selenium, tellurium, or gold.

Abstract: A silver halide photographic material is disclosed, comprising at least one silver halide emulsion layer on a support and a backing layer on the surface of the support opposite to the emulsion layer, wherein said silver halide emulsion layer comprises tabular grains having an aspect ratio of not less than 3 in a proportion of not less than 50% as calculated in the terms of projected area of the silver halide grains contained in the emulsion layer and the surface on the backing layer side has a Beck smoothness of not more than 150 seconds.

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: Disclosed herein is a silver halide color photographic light-sensitive material comprising at least three silver halide emulsion layers having different color sensitivities and formed on a reflective support. The support comprises a substrate and a composition layer laminated on at least the surface of the substrate on which the emulsion layers are coated, and made of a thermoplastic resin containing polyester as a main component and a white pigment mixed and dispersed in the resin. The polyester is a polyester synthesized by the polycondensation of a dicarboxylic acid and a diol. The silver halide contained in the material is silver chlorobromide having silver chloride content of 95 mol % or more, or silver chloride. The ratio of the coated amount of all hydrophilic colloid used in the material to the coated amount of silver contained in all silver halide used in the material ranges from 5.0 to 30.

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 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: 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: 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 amine borane.

Abstract: A photographic recording material on a transparent support having at least one light-sensitive silver halide emulsion layer and optionally conventional interlayers and protective layers, characterized in that the photographic recording material contains, in at least one of the above-mentioned layers, a compound corresponding to formula I, II or III ##STR1## wherein R.sub.1 denotes an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted heterocyclic group,R2 denotes hydrogen, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted alkylthio group,R.sub.

Abstract: Disclosed herein is a light-sensitive material which has a high sensitivity and excels in yellow-image storage stability and pressure resistance. The material has blue-sensitive emulsion layers containing specific acylacetoamide type yellow dye-forming couplers represented by formula (I): ##STR1## wherein R.sub.1 is a monovalent group, Q is a non-metal atom group which bonds to C to form 3- to 5-membered hydrocarbon ring and R.sub.1 is not a hydrogen atom and does not bond to Q to form a ring, at least one of the blue-sensitive emulsion layers contains at least one silver halide emulsion (A) having silver halide grains, 50% or more of which contain 10 or more dislocation lines per grain.

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 light-sensitive material comprises, on a support, at least one negative silver halide emulsion layer containing silver halide grains which are subjected to selenium sensitization, have at least one peak value in internal sensitivity speck numbers in a distribution of sensitivity specks, the peak value being present at a depth of 2 nm to less than 50 nm from the surface of the grains, and have an average aspect ratio of less than 8.

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: 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 silver halide emulsion contains light-sensitive silver halide grains in a binder. The silver halide emulsion is has been subjected to reduction-sensitization during grain formation and then added with at least one compound represented by the following formula (I), (II), or (III):R--SO.sub.2 S--M (I)R--SO.sub.2 S--R.sub.1 (II)R--SO.sub.2 S--L.sub.m --SSO.sub.2 --R.sup.2 (III)wherein R, R.sup.1, and R.sup.2 may be the same or different and represent an aliphatic group, an aromatic group, or a heterocyclic group, M represents a cation, L represents a divalent bonding group, and m represents 0 or 1. Compounds represented by formulas (I) to (III) may be polymers containing divalent groups derived from structures represented by formulas (I) to (III) as repeating unit. R, R.sup.1, R.sup.2, and L may be bonded to form a ring if possible.

Abstract: A silver halide photographic light-sensitive material have at least one silver halide emulsion layer on a support, wherein at least one of the silver halide emulsion layers comprises an emulsion subjected to chemical sensitization with a selenium compound and spectral sensitization with at least one type of a methine compound represented by Formula (I) below: ##STR1## wherein R.sup.1 represents --(CH.sub.2).sub.r --CONHSO.sub.2 --R.sub.3, --(CH.sub.2).sub.s --SO.sub.2 NHCO--R.sup.4, --(CH.sub.2).sub.t --CONHCO--R.sup.5, or --(CH.sub.2).sub.u --SO.sub.2 NHSO.sub.2 --R.sup.6 ; R.sup.3, R.sup.4, R.sup.5, and R.sup.6 each represent an alkyl group, an alkoxy group, or an amino group; R.sup.2 has the same meaning as R.sup.1 or represents an alkyl group; Z.sup.1 and Z.sup.2 each represent a nonmetal atom group required to form a 5- or 6-membered heterocyclic ring; each of L.sub.1, L.sub.2, and L.sub.3 represents a methine group; X.sub.

Abstract: Disclosed is a silver halide photographic light-sensitive material comprising a support and having thereon at least one silver halide emulsion layer, wherein the silver halide emulsion layer contains a gelatin comprising an iron ion of 0.5 ppm to 5 ppm and .alpha.-constituent having weight-average molecular weight of 80,000 to 120,000 in an amount of not less than 40% by weight of the gelatin.

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: A silver halide color photographic material comprising a reflective support having thereon a yellow dye image forming silver halide emulsion layer, a magenta dye image forming silver halide emulsion layer and a cyan dye image forming silver halide emulsion layer, wherein said yellow dye image forming layer, magenta dye image forming layer and cyan dye image forming layer exhibit a maximum spectral sensitivity in the range of 400 to 490 nm, 530 to 570 nm and 660 to 720 nm, respectively, said silver halide emulsion of said cyan dye image forming layer comprises a silver chloride, silver bromochloride or silver bromochloroiodide emulsion having a silver chloride content of 90 mol % or more with a maximum spectral sensitivity given by J-band absorption of a compound represented by the general formula (I), ##STR1## wherein the variables are described in the specification.

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: Disclosed is a silver halide photograhic material which includes a support and at least one emulsion layer. The material also contains a hydrazine derivative and 8-hydroxyguinoline or a derivative thereof. The emulsion may have been subjected to selenium and/or tellurium sensitization.

Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises a support having thereon a photographic layer including a silver halide emulsion layer wherein the outermost surface of said photographic layer has a pH value of from 5.4 to 5.9 and said silver emulsion layer contains a compound represented by the following formula I; ##STR1## wherein R.sub.1 is an alkyl group, a cycloalkyl group or an aryl group; R.sub.2 is an alkyl group, a cycloalkyl group, an acyl group or an aryl group; R.sub.3 is a substituent, n is 0 or 1; X.sub.1 is a substituent capable of splitting off upon coupling reaction with the oxidation product of a color developing agent; and Y.sub.1 is an organic group. The light-sensitive material is excellent in stability during storage and gives stable photographic characteristics even when pH value of developer is varied.

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 silver halide photographic emulsion contains silver halide grains comprising at least two portions, i.e., a core and an outermost shell with different silver halide compositions and having an average aspect ratio of less than 8. The core consists of silver iodobromide, silver chloroiodobromide, silver chlorobromide, or silver bromide. An average silver iodide content of the outermost shell is higher than that of the core and is 6 mol % or more. The silver halide grains are subjected to all of selenium sensitization, gold sensitization, and sulfur sensitization.

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 direct positive photographic light-sensitive material comprises a support and a light-sensitive emulsion layer provided thereon which contains non-pre-fogged internal latent image type silver halide grains of a core/shell structure. The cores of the silver halide grains are treated with a spectral sensitizing dye and a chemical sensitizer.

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.

Abstract: Disclosed is a silver halide color photographic material having at least one light-sensitive emulsion layer on a support, in which at least 50%, as the total projected area, of all the silver halide grains in at least one light-sensitive emulsion layer are tabular grains having a mean aspect ratio of 2 or more and at least one layer constituting the material contains a coupler of the following formula (I) and/or a coupler of the following formula (II): ##STR1## where X.sup.1 and X.sup.2 each represents an alkyl group, an aryl group, or a heterocyclic group; X.sup.3 represents an organic residue forming a nitrogen-containing heterocyclic group along with >N-- in the formula; Y represents an aryl group or a heterocyclic group; and Z represents a group capable of being released from the formula when the coupler of the formula reacts with an oxidation product of a developing agent. The material preferably contains a compound of formula (A):Q--SM.sup.

Abstract: A silver halide photographic material is descloosed, comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide emulsion layer contains at least 1.times.10.sup.-4 mol of a compound represented by formula (I) per mol of silver halide and from 1.times.10.sup.-3 to 1.times.10.sup.-1 mol of compound represented by formula (II) per mol of the compound of formula (I) and the iodine content of the silver halide emulsion is 1 mol % or less: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, Z.sub.1, Z.sub.2, Z.sub.3, Z.sub.4, X.sup..crclbar. and n are defined in the specification. The photographic material is highly sensitive, can be processed rapidly, and does not fatigue the developer, yet it contains only a small percentage of iodine, if any. The photographic material is useful in photographic films including X-ray films.

Abstract: A method for reducing speed change, or both speed change and fog growth, on aging in a photographic material composed of a silver chloride or silver bromochloride emulsion, by treating the emulsion with a thiosulfonate compound and a sulfinate compound, and the photographic emulsion and materials resulting from such treatment.

Abstract: An emulsion layer containing silver halide grains reduction-sensitized by an ascorbic acid or at least one of its derivatives and containing a nitrogen-containing heterocyclic compound having a mercapto group is formed on a support.

Abstract: A high contrast photographic image is formed by development of a photographic material with an amine-free developer having a low pH value. The photographic material has at least one silver halide emulsion on a support. The silver halide emulsion in the emulsion layer contains an iridium salt and/or a rhodium salt and comprises a gold-sensitized and sulfur-sensitized silver chlorobromide emulsion or silver chloroiodobromide emulsion having a silver chloride content of 50 mol% or more and a silver iodide content of 5 mol% or less. The emulsion layer contains a hydrazine compound represented by formula (I): ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group, which contains a partial structure, --O(--CH.sub.2 CH.sub.2 O).sub.n --, --O(--CH.sub.2 CH(CH.sub.3)O).sub.n -- or --O(--CH.sub.2 CH(OH)CH.sub.2 O).sub.n --, wherein n is an integer of 3 or more, as a part of the R.sub.1 substituent, or contains a quaternary ammonium cation as a part of the R.sub.1 substituent; G.sub.

Abstract: A silver halide color photographicmaterial capable of providing an excellent rapid processing property and sharpness as well as forming little stain on a background after processing.

Abstract: There is disclosed a silver halide photographic material having a photosensitive emulsion layer on a base, comprising a high-silver-chloride silver chlorobromide emulsion which is obtained by forming, on or near the surfaces of silver halide grains, silver bromide localized phases, and then by conducting chemical sensitization and is ripened under a condition having a limited pH. The disclosure described provides a silver halide photographic material suitable for rapid processing, high in sensitivity, and good in safelight aptitude and latent-image stability.

Abstract: A silver halide photographic material comprising at least one photosensitive emulsion layer contains silver halide grains on a support. In the silver halide photographic material, (1) the silver halide grains are prepared in the presence of iridium compounds, (2) the silver halide grains consist of silver chlorobromide which is essentially free of silver iodide, (3) at least 90 mol% of all silver halide from which the silver halide grains are made is silver chloride, (4) the silver halide grains have localized phase in which the silver bromide content exceeds at least 20 mol%, (5) the localized phase is precipitated together with at least 50% of all the iridium which is added during the preparation of the silver halide grains, and (6) the surface of the silver halide grains is chemically sensitized to the extent that the grains are essentially of the surface latent image type.

Abstract: The invention is generally accomplished when a heavy metal compound and a substituted thiourea sensitizer are used together as chemical sensitizers. There is a surprising increase in photographic efficiency and, therefore, in photographic sensitivity. This effect does not depend on the presence of a dye. The preferred heavy metal compound is potassium hexachloroiridate (IV), and the preferred thiourea is 3-acetamidophenyl thiourea.

Abstract: A silver halide photographic material which comprises a support having thereon at least one silver halide emulsion layer, wherein silver halide grains to be contained in the silver halide emulsion layer have a silver iodide content lower than 1 mol %, and the silver halide emulsion contains 3.0.times.10.sup.-3 to 2.times.10.sup.-2 mol of a thiocyanate per mol of silver halide. In addition, a photographic silver halide emulsion comprising silver halide grains wherein said silver halide grains have an average silver iodide content lower than 1 mol %, and deposited on the surface of the silver halide grains is at least 2.times.10.sup.-3 mol, but less than 2.times.10.sup.2 mol of a thiocyanate per mol of silver halide.

Abstract: A silver halide photographic light-sensitive material includes a support and at least one layer of silver halide emulsion formed on the support. The emulsion layer contains silver halide grains which have been subjected both to reduction sensitization while growing and to at least one chemical sensitization selected from the group consisting of gold sensitization, sulfur sensitization, and noble-metal sensitization. Each of the silver halide grains has at least 5 mol % of silver iodide on a surface thereof.