Abstract: Improved bleach-accelerating compositions that are especially useful in the reversal color processing of photographic elements are comprised of a bleach-accelerating agent and a dye-stabilizing agent. Formaldehyde precursors function as particularly effective dye-stabilizing agents in such compositions. The bleach-accelerating composition is utilized subsequent to the color developing step and prior to the bleaching step and serves to enhance the effectiveness of the bleaching step and to provide improved dye stability.

Abstract: Improved bleach-accelerating compositions that are especially useful in the reversal color processing of photographic elements are comprised of a bleach-accelerating agent and an ethyleneoxy-substituted fatty acid ester of sorbitan. The bleach-accelerating composition is utilized subsequent to the color developing step and prior to the bleaching step and serves to enhance the effectiveness of the bleaching step. Incorporation of the ethyleneoxy-substituted fatty acid ester of sorbitan in the bleach-accelerating composition serves to avoid or at least minimize problems of scum formation which commonly occur in such compositions.

Abstract: The present invention relates to a method for continuously processing a color reversal photographic material. After black and white development, the color reversal photographic material is rinsed in a bath wherein the replenishing amount per unit area of the photographic material is 3 to 50 times as much as the amount of processing solution carried over from the preceding bath in terms of volume ratio and the pH is 9.5 or below.

Abstract: A silver halide color reversal reflection print photosensitive material comprises at least one blue-sensitive layer, at least one green-sensitive layer and at least one red-sensitive layer on a support. In the characteristic curves of the color sensitive layers, a fluctuation width of point-gammas and absolute values of point-gammas are defined. The distribution of the grain size of the silver halide grains in silver halide emulsions contained in the color sensitive layer can be controlled by forming the grains in the presence of a silver halide solvent.

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 method of preparing a hologram which comprises subjecting holographic material to a holographic exposure, the holographic material comprising a silver halide emulsion of which at least 80% by weight of the halide is bromide, developing the exposed material in a silver halide developing solution to yield developed silver, converting the residual silver bromide, in the main part at least, to silver iodide by use of an aqueous iodide solution, removing the developed silver but leaving the silver iodide either by use of a bleach/fix bath under controlled conditions or by rehalogenating the developed silver to silver bromide or chloride using a brominating or chlorinating silver bleach solution and simultaneously or subsequently fixing out the thus formed silver bromide or chloride using a fixing agent under such conditions that silver iodide is not dissolved from the material.

Abstract: A process for processing a silver halide color reversal photographic light-sensitive material is disclosed, which comprises developing an imagewise exposed silver halide color reversal photographic light-sensitive material with a black-and-white developer containing at least one compound selected from the compounds of Group A, at least one compound selected from the compounds of Group B, and preferably further at least one compound selected from the compounds of Group C, whereinGroup A consists of organic heterocyclic compounds represented by formulae (A-I), (A-II), (A-III), and (A-IV) ##STR1## Group B consists of benzoimidazole, indazole, benzotriazole, benzooxazole and benzothiazole compounds, not containing a thiol group, a thioether bond, a thioketone group, or a disulfide bond.Group C consists of compounds represented by formulae (C-I) and (C-II). ##STR2## wherein the symbols are as defined in the appended claims.

Abstract: A method for processing an imagewise exposed silver halide color reversal photographic material which comprises processing the color reversal photographic material with a black-and-white developer containing at least one compound represented by the following general formula (I-a) or (I-b): ##STR1## wherein M represents a hydrogen atom, an alkali metal, or an ammonium ion; R represents a hydrogen atom, an unsubstituted or substituted alkyl group, a hydroxy group, --SO.sub.3 M.sup.1, or --COOM.sup.1 ; R.sup.1 represents --SO.sub.3 M.sup.1 or --COOM.sup.1, wherein M.sup.1 represents a hydrogen atom, an alkali metal, or an ammonium ion; and n represents an integer of 1 to 6; and wherein n is 2 to 6, each of said Rs may be the same or different.

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: A color reversal light-sensitive material comprising a support having coated thereon at least a pair of silver halide emulsion layers having mutually different color sensitivities and consisting of an emulsion having a high silver/coupler ratio and an emulsion having a low silver/coupler ratio, the former ratio being greater by a factor of at least 5 than the latter ratio, and the latter emulsion being incorporated with a compound containing recurring units represented by the following General Formula (I): ##STR1## the substituents being defined within the specification. By including the compound of the general formula (I) within the particular emulsion layer which is highly susceptible to changes in sensitivity and maximum density, it is possible to prevent deterioration in color balance which has been found to be due to variation in the concentration of potassium bromide.

Abstract: A color reversal photographic light-sensitive material is disclosed. The material is comprised of a support base having thereon a silver halide emulsion layer, an organic compound and colloid grains of a metal or metal sulfide or silver halide grains the surface of which is previously fogged. The silver halide emulsion layer includes fine grains of silver halide particles having a particle size of 0.3.mu. or less. The fine grain particles are present in the emulsion in an amount in the range of about 30% to about 95% based on the total number of silver halide grains in the emulsion. The silver halide emulsion also includes coarse grains having a particle size of more than 0.3.mu.. The organic compound has a solubility product constant of 10.sup.-14 or less when forming a salt with a silver ion.

Abstract: A method of color reversal treatment of an exposed silver halide photographic material is disclosed. The method involves treating the exposed material with 2 both type black-and-white developing solutions. The first solution contains a compound represented by the general formula (I):R.sub.2 --S--R.sub.1).sub.d --S--R.sub.2 (I)wherein R.sub.1 represents an alkylene group having 2 to 10 carbon atoms, which may have ether bonds, R.sub.2 represents an alkyl group having 2 to 10 carbon atoms which alkyl group may have substituents, ether bonds or ester bonds, and d represents an integer of 0 to 3. The second black-and-white developing solution is a conventional solution. By utilizing the two solutions and specifically the first solution containing the compound of general formula (I) it is possible to obtain good photographic images having a high maximum density and good color balance.

Abstract: The definition of a photographic emulsion of the positive acting type that would normally produce a positive image is improved by normally exposing the emulsion to actinic radiation and developing the photographic emulsion, bleaching it, exposing the emulsion again to actinic radiation and redeveloping it to reverse the image that would normally result on the film.

Abstract: A reversal development processing method for black and white silver halide photographic light-sensitive materials which comprises bleaching an imagewise exposed black and white silver halide photographic light-sensitive material with a bleaching solution containing at least one oxidizing agent capable of forming a water-soluble silver salt when reacted with the silver images of said exposed light-sensitive material in the presence of at least one bleach accelerating agent selected from the compounds represented by the general formulae (I) to (VIII) described in the specification.

Abstract: A broadband laser recording and data storage medium for direct read after writing, formed from a photosensitive silver-halide emulsion in four steps. First, a non-saturating actinic radiation exposure is used to create latent images. A normal photographic development is used to produce a medium of gray neutral density. The surface of the remaining silver halide is fogged in a water or alcohol based solution to create a very thin layer of silver precipitating nuclei on the surface. Finally, a single-step, negative silver diffusion transfer process is used to dissolve the unexposed and undeveloped silver halide, forming silver ion complexes.

Abstract: An improved photographic material is provided comprising a mixture of individual emulsions having the same narrow particle size distribution but which are desensitized in a differring degree.

Abstract: Photographic elements containing image-wise developable silver halide are developed in the presence of an oxathioether development activator according to the formula:R.sup.1 --A--(OCH.sub.2 CH.sub.2).sub.n --S--A'--(X--A").sub.m --Y--R.sup.2wherein:R.sup.1 is H, alkyl, hydroxyalkyl, or R.sup.2 --Y--(A"--X).sub.m --A'--S--,A, A', and A" is alkylene, with the proviso that A is a monovalent bond when R.sup.1 is hydrogen or alkyl or hydroxyalkyl,X is --OCO--, --SO.sub.2 --, --CONH--, or Y,Y is ligand or complexing function of the type of --S-- and --N(Q)-- (Q=H or alkyl),R.sup.2 is alkyl, which may be substituted by OH, or when Y is --N(Q)--, R.sup.2 together with Q may represent the atoms needed to complete a nitrogen-containing saturated ring,n is at least 2, and m is 0 or 1.The development activators can be used in black-and-white development or in color development. They can be incorporated in the photographic material or in the developing solution.

Abstract: Thiocarbohydrazide derivatives act as stabilizers when processing photographic materials in the conventional black and white developers of the type used as first developer in color reversal processes. Furthermore, they can promote the development of color in the second developer in color reversal processes in such a way that a second exposure or fogging baths may be dispensed.

Abstract: Fine-grain silver halide emulsions of the Lippmann-type are described which comprise derivatives of heterocyclic mercaptans corresponding to the formulae: ##STR1## wherein: each of Z.sub.1 and Z.sub.2 represents the atoms necessary to complete a 5- or 6-membered heterocyclic ring system,n is 0 or 1,X is --CO-- or --CS--,R is an alkyl group or an aryl group, andY is --CO--, --COO--, --CS--, --SO.sub.2 --, --CON(R.sub.1)-- or --CSN(R.sub.1)--, R.sub.1 being hydrogen, alkyl or aryl.Both in reversal and negative processing sharpness of fine detail is improved and the distortion of image-details is reduced. Upon reversal processing yellow staining is also reduced.

Abstract: Positive images including color images are obtained by a photographic reversal process by imagewise exposure of a material which comprises at least one light-sensitive silver halide emulsion layer, black and white development, fogging and color development characterized in that the fogging is carried out in the presence of a compound of the formula ##STR1## wherein the symbols are defined as hereinafter.

Abstract: A photographic reversal process is provided in which the photographic material is treated with a potential fogging agent in the preliminary bath preceding the color development bath in such a manner as to obviate the disadvantages of known chemical fogging agents.