Abstract: A photographic silver halide emulsion comprising a 1,1,3,3-tetrasubstituted middle chalcogen urea compound is described wherein at least one substituent comprises a nucleophilic center. The urea compound is an effective chemical sensitizing agent. A process for chemically sensitizing silver halide is also described.

Abstract: A water-soluble silver salt and a water-soluble halide are reacted to obtain silver halide particles, and these are, after being demineralized, transhalogenated by adding thereto a water-soluble bromide in an amount of 0.1 mol % to 7 mol % of the total silver halide amount just before or during the sulfur sensitization, to obtain a sulfur-sensitized silver halide emulsion of high sensitivity. The present photographic materials contain the sulfur-sensitized silver halide emulsion and have high sensitivity and excellent pressure characteristics. The transhalogenation along with the sulfur sensitization is effective for the improvement of the sensitivity and the pressure characteristics of the materials.

Abstract: A silver halide photographic material is described, having at least one light-sensitive silver halide emulsion layer containing an iodine-containing silver halide on a support and having one or more auxiliary layers on the outermost surface of a light-sensitive silver halide emulsion layer positioned farthest from the support, wherein at least one of the auxiliary layers contains a substantially non-light-sensitive silver halide emulsion or a silver halide emulsion containing grains whose inner part or surface part is fogged, and the material contains at least one compound represented by formula (I) ##STR1## wherein R, X, Y, Z, and n are described in the specification.

Abstract: A novel silver halide photographic material is provided comprising a support and at least one silver halide photographic emulsion layer formed thereon and containing in said photographic emulsion layer or at least one hydrophilic colloid layer a compound represented by formula (I): ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each represents a hydrogen atom, an aliphatic residual group, an aromatic residual group, or a heterocyclic residual group; R.sup.3 represents a hydrogen atom or an aliphatic residual group; L.sub.1 represents a divalent aliphatic group, a divalent aromatic group, or a divalent heterocyclic group; L.sub.2 represents --O--, --CONR--, --NRCO--, --SO.sub.2 NR--, --NRSO.sub.2 --, --OCO--, --COO--, --S--, --NR--, --CO--, --SO--, --SO.sub.2 --, --OCOO--, --NRCONR'--, --NRCOO--, --OCONR--, or --NRSO.sub.

Abstract: A silver halide photographic emulsion is disclosed. The emulsion has silver halide grains that consist essentially of silver chlorobromide and which have been sulfur-sensitized in the presence of a silver halide solvent.

Abstract: A negative type silver halide photographic material and a method for processing the photographic material to form a super high contrast negative image are disclosed. The photographic material comprises a support and at least one emulsion layer on the support, said emulsion layer comprising silver halide grains comprising a core of silver halide containing silver iodide and a shell covering the core, said shell consisting essentially of silver bromide, silver chloride, or silver chlorobromide and having a thickness of from 0.01 to 0.08 .mu.m, wherein the emulsion layer or a hydrophilic colloid layer other than the emulsion layer of the photograpic material contains a hydrazine derivative.

Abstract: A negative type silver halide photographic material and a method for forming a super high contrast negative image using the photographic material are disclosed. The photographic material comprises a support, at least one silver halide emulsion layer on the support, and at least one light-insensitive colloid layer on the support, said emulsion layer or light-insensitive hydrophilic colloid layer containing a hydrazine derivative, and further contains the tertiary amine salt of an acid polymer.

Abstract: This invention is directed to a photographic element containing a radiation-sensitive silver halide emulsion layer and a cyclic thioether compound comprised of at least one oxygen atom and at least three sulfur atoms, each of said atoms being separated from one another by a divalent alkylene group.

Abstract: A photographic silver halide emulsion comprising a 1,1,3,3-tetrasubstituted middle chalcogen urea compound is described wherein at least one substituent comprises an acid function. The urea compound is an effective silver halide grain growth-modifying agent. A process for modifying the grain growth of silver halide is also described.

Abstract: Negative type silver halide photographic emulsions are provided, formed by growing silver halide grains in the presence of a water-soluble iridium salt in a molar ratio of 3.times.10.sup.-4 mol or more to the amount of the total silver halides used in the formation of the silver halide grains and then chemically sensitizing the surfaces of the grains formed with a sulfur compound or with a sulfur compound and a gold compound. The present emulsions have high sensitivity and extremely improved variation of sensitivity and gradation under broad exposure conditions of high intensity exposure and low intensity exposure.

Abstract: A silver halide photographic material comprising a support having at least one silver halide emulsion layer containing substantially surface latent image type silver halide grains, said emulsion layer or at least one hydrophilic colloid layer adjacent to the emulsion layer containing a compound represented by general formula (III): ##STR1## wherein L.sub.2 represents --CONR--, --SO.sub.2 NR-- or --NRCONR' and Z, L.sub.1, m, Ro, R.sub.1 and M are as herein described. The silver halide photographic material is capable of having high contrast negative images, high sensitive negative images, and good dot images.

Abstract: A photographic silver halide emulsion comprising a thioether compound having more than 2 sulfur atoms in alkyl chains substituted on benzene nuclei. The compounds are useful in enhancing silver halide crystal growth. A process for preparation of the emulsion is also described.

Abstract: Photographic direct-positive emulsions with silver halide crystals of layered structure are prepared.The silver halide crystals of these emulsions can form a latent internal image and are superficially converted to silver iodide. Normal surface developers are suitable for developing.

Abstract: A negative silver halide photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer is disclosed. At least one of the silver halide emulsion layers or another hydrophilic colloidal layer of the material contains a hydrazine derivative and a compound represented by the formula:R.sub.1 --S--S--R.sub.2wherein R.sub.1 and R.sub.2, which may be the same or different, each represents an aliphatic group, an aromatic group or a heterocyclic group, or when R.sub.1 and R.sub.2 are both aliphatic groups they may together form a ring. The material can rapidly form a superhigh contrast image using a stable processing solution.

Abstract: A photographic silver halide emulsion is described which comprises an acyclic thioether compound which is capable of enhancing silver halide crystal growth without causing fog formation. A process for preparation of the emulsion is also described.

Abstract: A photographic silver halide emulsion comprising a thioether substituted pyridine compound having improved ripening properties. A process for preparation of the emulsion is also described.

Abstract: A color photographic recording material developable by heat treatment and comprising at least one binder layer, which contains photosensitive silver halide, optionally a substantially non-photosensitive silver salt and a color providing compound (dye releaser), can be improved in regard to the Dmin/max relation and in regard to sensitivity by addition of a compound corresponding to formula IR.sup.1 --S--CO--O--R.sup.2in which R.sup.1 and R.sup.2 independently of one another represent alkyl, alkenyl, cycloalkyl, aralkyl or aryl.

Abstract: Disclosed are novel compounds of the formula: ##STR1## wherein: X=--NR.sub.5 R.sub.6, or --OR.sub.7 ;R.sub.1 and R.sub.2 are independently hydrogen, substituted or unsubstituted alkyl, haloalkyl, hydroxyalkyl alkoxyalkyl, alkylaminoalkyl or arylalkyl having up to 18 carbons; cycloalkyl; phenyl or naphthyl; alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituents.R.sub.3 is hydrogen, benzyl, alkoxybenzyl, halobenzyl or alkylbenzyl, provided that if neither R.sub.1 nor R.sub.2 is hydrogen, then R.sub.3 is hydrogen.R.sub.4 is a divalent aromatic group which is substituted or unsubstituted.R.sub.5, R.sub.6, and R.sub.7 are independently hydrogen, alkyl, hydroxyalkyl, haloalkyl, alkoxyalkyl, alkylaminoalkyl, acylaminoalkyl, aminoalkyl or phenylalkyl having up to 12 carbons; a cycloalkyl substituent; phenyl or naphthyl; an alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituent.Furthermore, either R.sub.1 and R.sub.3 or R.sub.1 and R.sub.

Abstract: A silver halide photographic emulsion containing silver halide grains, the surface of which is a (110) crystal plane substantially composed of silver bromide or silver iodobromide is disclosed. A process for producing a silver halide photographic emulsion containing silver halide grains the surface of which is substantially composed of silver bromide or silver iodobromide, which comprises performing growth of the silver halide grains in an aqueous medium in the presence of a hydrophilic protective colloid and a compound accelerating the development of a (110) crystal plane is also disclosed.

Abstract: A silver halide photographic material having at least one silver halide emulsion layer which contains silver halide grains containing from 1.times.10.sup.-8 to 8.times.10.sup.-6 mole of a rhodium salt per mole of silver, and containing in said emulsion layer or another hydrophilic colloidal layer a compound represented by formula (I)R.sup.1 -NHNH-G-R.sup.2 (I)wherein R.sup.1 represents an aliphatic group or an aromatic group; R.sup.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted imino group; is exposed to imagewise pattern of light and then development-processed with a developer containing 0.15 mole/liter or more of sulfite ion and having a pH adjusted to from 9.5 to 12.

Abstract: A process for preparing a silver halide emulsion wherein a sulfur-containing silver halide solvent which accelerates growth of silver halide grains and an oxidizing agent capable of reducing or eliminating the grain growth effect of the sulfur-containing silver halide solvent are used, and a silver halide photographic light-sensitive material containing the silver halide emulsion prepared by the process are disclosed. The grain growth effect of the sulfur-containing silver halide solvent can be controlled at any necessary stage without accompanying substantial deterioration in photographic properties.

Abstract: A silver halide photographic light-sensitive emulsion contains silver halide particles, chemically sensitized, the average concentration of the silver iodide of which is from 0.5 to 10 mole % and which have inside part wherein not less than 20 mole percent silver iodide is present locally; and at least one cyanine dyes having the Formulas [I], [II] and [III] as herein described.

Abstract: A silver halide photographic light-sensitive material comprising a support having coated thereon at least one silver halide emulsion layer and a surface protecting layer, said silver halide photographic light-sensitive material comprising photosensitive silver halide grains and internally fogged silver halide grains, said internally fogged silver halide grains having adsorbed thereon at least one compound represented by the formula (I): ##STR1## wherein X represents --O--, --NH-- or --S--, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen atom or a substituent, and at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is substituted or unsubstituted alkyl or aryl group having up to 13 carbon atoms, which is bonded directly or through a divalent linkage group, to the aromatic nucleus.

Abstract: A heat developable light-sensitive material comprising a support having thereon (1) a light-sensitive silver halide emulsion, (2) at least one of a base and a base precursor, and (3) a binder, wherein the silver halide emulsion is one which is chemically sensitized in the presence of a sensitizing dye. With the heat developable light-sensitive material, decrease in sensitivity and formation of fog during preservation thereof are prevented.

Abstract: An internal latent image-type silver halide emulsion containing core/shell type silver halide grains with a mean grain size of about 0.4 .mu.m or less, the grains comprising a core of chemically sensitized silver halide and a shell of silver halide covering at least the light-sensitive sites of the core and the surface of the grains being chemically sensitized wherein the core is chemically sensitized to such an extent that the difference between fog density F.sub.1 and fog density F.sub.2 as defined herein (i.e., internal fog density) is at least 0.10. This emulsion permits the formation of good reversal images in which D.sub.max is high and D.sub.min is low and, furthermore, has a superior storage stability.

Abstract: A negative working photographic element is disclosed capable of producing a high contrast silver image. The photographic element is comprised of surface latent image forming monodispersed silver halide grains having a mean diameter of less than 0.7 .mu.m, a contrast enhancing arylhydrazide, and, in an amount sufficient to stabilize sensitivity, a carboxyalkyl substituted 3H-thiazoline-2-thione.

Abstract: In the presence of a novel antifoggant represented by the general formula (I), a silver halide photographic material which has at least one light-sensitive silver halide emulsion layer on a support is development-processed. The developing solution is one containing both dihydroxybenzenes and 3-pyrazolidones, a developing solution containing both dihydroxybenzenes and aminophenoles, or a developing solution containing a primary aromatic amine developer to suppress markedly fog generation at much reduced sacrifice of sensitivity: ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, NH.sub.4 or a mercapto group-protecting moiety which can be split-off in the presence of an alkali; n represents 1, 2 or 3; R.sup.1 represents a hydrogen atom or --COOR.sup.2 ; and R.sup.2 represents a hydrogen atom, an alkali metal atom, NH.sub.4, or an unsubstituted or substituted alkyl, aryl or aralkyl group.

Abstract: An internal latent image-type direct positive silver halide light-sensitive material is described, comprising a support having at least one photographic emulsion layer thereon, wherein said layer contains internal latent image-type direct positive silver halide grains, the surfaces of which are chemically sensitized, wherein a compound of the general formula (I) is added as a finish additive to the photographic emulsion layer or at least one hydrophilic colloid layer adjacent to the photographic emulsion layer.General Formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined as herein. The light-sensitive material exhibits a very satisfactory reversal performance and is greatly improved in stability over the course of time.

Abstract: An improved method of developing silver halide photographic light-sensitive materials comprising at least one silver halide emulsion layer on a support is disclosed. In the improvement, said silver halide emulsion layer contains core/shell type silver halide grains having a shell thickness of 25 to 150 .ANG. wherein the surface of the core is subjected to chemical sensitization treatment and the surface of the shell is not subjected to chemical sensitization, and a developing solution contains a solvent for silver halide. It is possible to carry out spectral sensitization without causing a reduction in intrinsic sensitivity and to provide high-speed silver halide light-sensitive materials which are excellent in anti-fading property of latent images and excellent in stabilization with the passage of time using the above-described improved method.

Abstract: Photographic elements and assemblages are described which employ nondiffusible N',N'-diaromatic carbocyclic--or diaromatic heterocyclic--sulfonohydrazide compounds which are capable of releasing photographically useful groups in an imagewise manner as a function of silver halide development.

Abstract: A negative working photographic element is disclosed capable of producing a high contrast silver image. The photographic element is comprised of surface latent image forming monodispersed silver halide grains having a mean diameter of less than 0.7 .mu.m, a contrast enhancing arylhydrazide, and, in an amount sufficient to reduce pepper fog while maintaining high contrast a polyhydroxybenzene and a carboxyalkyl-3H-thiazoline-2-thione.

Abstract: A silver halide photographic material having at least one layer of silver halide emulsion layers containing a silver halide having a silver chloride content of not less than 25 molar %, characterized in that at least one of said silver halide emulsion layers contains a silver halide sensitized with a compound having the following formula (Ia), and/or a compound having the following formula (Ib) and is hardened with a compound having the following formula (II) and/or a compound having the formula (III); ##STR1## in the above formulae (Ia), (Ib), (II) and (III), R.sub.1 to R.sub.20, Z.sub.1 and Z.sub.2, n.sub.1 and n.sub.2, Q and Q', L, p and q are defined in the specification.The photographic material of the invention not only shows a higher sensitivity, a lower infrared sensor fogging, a superior sharpness or color reproductivity and a superior whiteness but also exerts a good storage property with time or a lower change in sensitivity after storage.

Abstract: A silver halide photographic light-sensitive material is described containing at least one electron-donative, silver halide-adsorptive compound represented by the following general formula (A) or (B), which is not a spectral sensitizing agent for silver halide or a nucleating agent:D--L--X (A)D--X (B)wherein D represents an electron donative atomic group comprising an aromatic ring or hetero ring, which may be unsubstituted or substituted with at least one substituent; L represents a linkage group containing at least one of C, N, S or O; and X represents a group which is adsorptive with a silver halide-adsorptive group containing at least one of C, N, S, O or Se, said N being optionally quarternized.

Abstract: A silver halide emulsion rich in chloride is described which has grains having a layered grain structure with a core and at least one layer encasing the core.

Abstract: A method for developing a silver halide photographic material in the presence of an amino compound represented by the following general formula (I) or the salt thereof to increase photographic speed and/or gamma without being attended by a concomitant increase in generation of fog: ##STR1## wherein R.sup.1 represents an alkyl group, an aryl group, an aralkyl group or a cycloalkyl group; R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group or an alkylcarbonyl group, or R.sup.2 and R.sup.3 may combine with each other and form a ring; and A represents a divalent aliphatic linkage group.

Abstract: An internal latent image core/shell silver halide photographic emulsion containing core/shell silver halide grains is disclosed, the grains comprising a silver halide core which is doped with a metal ion or chemically sensitized or is both doped with a metal ion and chemically sensitized, and a silver halide shell which covers at least a sensitivity speck of the core, wherein both added iodine ion and a polymer having a specific repeating unit described in the specification are present on the surface of the core/shell silver halide grains. The emulsion has a high sensitivity even without chemical sensitization of the surface of core/shell silver halide grains.

Abstract: Silver halide photographic materials with higher sensitivity and less fogging having at least one silver halide emulsion layer over a photographic base or support wherein the emulsion of said emulsion layer substantially contains core/shell-type silver halide grains or core/shell-type monodisperse silver halide grains, core portion of said grain containing silver iodide in a greater amount than that contained in shell portion of said grain and said emulsion is subjected to chemical ripening in the presence of a labile selenium compound, optionally with coexistence of a silver halide solvent, and said emulsion may contain further a specific phenol compound.

Abstract: Silver halide color photographic material comprising a support and at least one emulsion layer thereon, the emulsion layer containing silver halide grains comprising core particles of high chloride content and a silver halide coating layer on the core particle. The coating layer is primarily silver bromide and the combined silver halide content of the core particles and the coating thereon is 90 to 99.5 mol % silver chloride and 0.5 to 10 mol % silver bromide.

Abstract: An unballasted arylhydrazide is disclosed the aryl moiety of which is substituted with a group of the formula ##STR1## where one of X and X' represents --NH--, the other represents a divalent chalcogen, and R represents an aliphatic or aromatic residue. The arylhydrazides, when applied to halftone imaging in conjunction with silver halide emulsions, photographic elements, and imaging processes, produce images of improved dot quality and low levels of pepper fog.

Abstract: A silver halide photographic material is disclosed. The material is comprised of a support base having positioned thereon a silver halide emulsion layer and a surface protective layer. The emulsion layer contains a photosensitive silver halide emulsion, an internally fogged silver halide emulsion and a compound represented by the general formula (I):R.sub.1 [(R.sub.3).sub.l X].sub.n R.sub.3 '--R.sub.2wherein the substituents within the general formula (I) are defined within the specification. The photographic material is capable of providing an image having a high maximum density at a high speed and a high contrast. The material can be processed without requiring any specific additives in a short developing period using low-temperature processing. The material also possesses high-temperature quick processing aptitude.

Abstract: A silver halide photographic material which contains a light-sensitive silver halide emulsion and an internally fogged silver halide emulsion is development-processed in the presence of at least one compound selected from the group consisting of compounds represented by the general formulae (I) and (II) and at least one azaindene having a mercapto group to exhibit high photographic speed, high contrast and high maximum image density:R.sub.1 --(R.sub.3).sub.l X}.sub.n R.sub.3 '--R.sub.2 (I)wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an aryl group, an aryl group, or a heterocyclic group; R.sub.3 and R.sub.3 ' each represents an alkylene group, an arylene group, a heterocyclic group; X presents ##STR1## R.sub.4 represents a hydrogen atom or --R.sub.5 --Y}.sub.m R.sub.5 '--R.sub.6 ; R.sub.5 and R.sub.5 ' have the same meanings as R.sub.3 and R.sub.3 '; R.sub.6 has the same meaning as R.sub.1 and R.sub.2 ; Y represents ##STR2## R.sub.7 has the same meaning as R.sub.1 and R.sub.

Abstract: A novel silver halide emulsion is disclosed. This silver halide emulsion comprises in combination (a) silver halide made of silver chlorobromide or silver chlorobromoiodide, (b) a hydroxytetrazaindene compound and (c) a nitrogen-containing heterocyclic compound having at least one mercapto group, the grains of said silver halide having such a size distribution that the variation co-efficient is not more than 0.15.

Abstract: A silver halide photographic light-sensitive material is disclosed. The material is comprised of a support base having thereon a silver halide emulsion layer and a protective layer. The material contains a photosensitive silver halide emulsion and inside fogged silver halide emulsion as well as a disulfide compound. The disulfide compound is a compound represented by the general formula (I):A--S--S--B (I)wherein A and B independently represent an alkyl group, an aralkyl group, an aryl group, a heterocyclic group or ##STR1## wherein R represents an alkyl group, an aryl group, an aralkyl group, a heterocyclic group or an amino group. The material can form images having high contrast and a high maximum density. Further, the material has high sensitivity to light and can be developed at a low temperature in a reduced amount of time.

Abstract: Desensitization defects due to nonferrous metal contamination of a silver halide film sensitized by a cysteine-thiazolidine moiety are decreased by incorporating a chelating agent such as quinaldic or picolinic acid into one or more layers of the film.

Abstract: A lithographic photosensitive material which comprises a support having thereon at least one silver halide emulsion layer and that, contains as a lithographic development accelerating agent a compound represented by the following general formula (I) in its silver halide emulsion layer or another hydrophilic colloidal layer: ##STR1## wherein R.sub.1 to R.sub.5 may be the same or different, and they each represent hydrogen, a halogen atom, an alkyl group, an alkoxy group, an aryl group, ##STR2## (wherein R.sub.6 and R.sub.7 each represents hydrogen or an alkyl group, or they may combine with each other to form a 5- or 6-membered nitrogen containing saturated hetero ring), --NH--CO--R.sub.8 or --NHSO.sub.2 --R.sub.9 (wherein R.sub.8 and R.sub.9 each represents an alkyl group, an aryl group or an aralkyl group), or R.sub.3 and R.sub.4, or R.sub.4 and R.sub.5 may combine with each other to form a benzene ring and that, it is necessary to said compound that at least one of substituents R.sub.1, R.sub.3 and R.sub.

Abstract: Novel silver halide crystals useful for both negative and positive photographic elements are produced by balanced double jet precipitation. Using that process, silver halide adds preferentially to the (111) surfaces of tetradecahedral silver bromide or iodobromide crystals to form cubic crystals which have corners containing a different silver halide from that in the lateral surfaces. In a specific embodiment, a crystal has corners composed of silver bromochloride, while the crystal substrate consists of highly photosensitive silver iodobromide.

Abstract: The use of sulfinic acid radical substituted arylhydrazides in producing images in silver halide photographic elements is disclosed. The sulfinic acid radical substituted arylhydrazide can be incorporated in photographic silver halide, emulsions, and photographic elements. The sulfinic acid radical substituent is capable of activating the arylhydrazides, particularly for use at a lower alkaline pH. In negative working surface latent image forming emulsions the sulfinic acid radical substituted arylhydrazides permit higher speed or contrast to be achieved. In direct positive internal latent image forming emulsions increased nucleation activity and reduced rereversal can be achieved.

Abstract: The use of oxythioamido substituted arylhydrazides in producing images in silver halide photographic elements is disclosed. The oxythioamido substituted arylhydrazide can be incorporated in photographic silver halide emulsions. The oxythioamido substituent is capable of promoting adsorption of the arylhydrazide to silver halide grain surfaces. In negative working surface latent image forming emulsions the oxythioamido substituted arylhydrazides permit higher speeds to be achieved. In direct positive internal latent image forming emulsions increased nucleation activity can be achieved.

Abstract: Blended emulsions for use in forming a direct-positive image are disclosed. The emulsions are comprised of a first, radiation-sensitive core-shell grain population having a relatively low coefficient of variation and a second, substantially smaller size grain population capable of .Iadd.internally forming a latent image by .Iaddend.internally trapping photolytically generated electrons. Photographic elements incorporating the blended emulsions exhibit improved covering power and can exhibit enhanced speed.

Abstract: Photographic elements particularly adapted for forming direct-positive images are disclosed in which a radiation-sensitive core-shell emulsion layer and a silver halide emulsion layer incapable of forming a surface latent image within the direct-positive exposure latitude of the first emulsion layer and containing a grain population capable of internally .Iadd.forming a latent image by internally .Iaddend.trapping photolytically generated electrons are both present. The photographic elements are capable of exhibiting increased covering power, greater maximum density, and increased speed.