Abstract: Printing plates having a photosensitive layer coated on a support wherein said photosensitive layer contains a powdered solid adhered to the surface of said plate by means of powdering followed by the application of heat or solvent before exposure. Said powders are capable of being removed from said surface during the developing process.

Abstract: A packaged photographic product, comprising a composite having a light-sensitive photographic material interposed between protective materials, which composite is further packaged within a barrier packaging material, said barrier packaging material having at least a metal layer provided internally and at least one layer of a polyolefin or a polyolefin derivative prepared by extrusion lamination, and said product also satisfying at least one of the conditions (a) and (b) shown below:condition (a): the surface potential of said barrier packaging material on the side of said protective material having an absolute value of not higher than 75 V;condition (b): the surface specific resistance of said protective material being not higher than 1.times.10.sup.11 .OMEGA. under the condition of the relative humidity of 60%.

Abstract: A novel method of forming high contrast silver images is provided. The method comprises steps of (1) imagewisely exposing a light-sensitive silver halide photographic material, and (2) treating the exposed material with a developer having superadditivity. The method is characterized by the co-existence of an oxidizing agent, and a water-insoluble ion pair formed by a water-soluble cationic compound such as quaternary ammonium or tertiary sulfonium salt and a water-soluble anionic compound such as organic sulfate. The method realizes high contrast photographic images by using a developer having a good preservability, without contamination of the developer, within a short period of time for the development. There is also provided a light-sensitive silver halide photographic material herein.

Abstract: A light-sensitive silver halide photographic material containing a tetrazolium compound, is treated with a developing solution containing no hydroquinone developing agent, which material comprises a support and a silver halide emulsion layer coated thereon, containing silver halide grains having an average grain size of 0.05 to 1.5.mu., at least 75% of said grains being within a range of 0.6 to 1.4 times the said average grain size and a sensitizing dye.

Abstract: A light-sensitive silver halide photographic material which comprises a compound represented by general formula [I] shown below:General formula [I] ##STR1## wherein A represents a phosphorus atom, a nitrogen atom or an arsenic atom; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent a substituted or unsubstituted aryl group; X represents a persulfate ion, a chlorate ion, a bromate ion, an iodate ion or a metal complex anion; and n is an integer of 1 to 4,and a method for processing the same.

Abstract: Light-sensitive silver halide photographic materials which comprise a support, a hydrophilic colloidal layer coated thereon which contains a silver halide emulsion layer and tetrazolium compounds, said silver halide emulsion layer containing a combination of two types of specific sensitizing dyes.

Abstract: A method of processing light-sensitive silver halide photographic material to be treated with a developing solution containing no hydroquinones developing agent, which material comprises a support, a silver halide emulsion layer coated thereon containing silver halide grains having an average grain size of 0.1 to 0.8.mu., at least 75% of said grains being within a range of 0.6 to 1.4 times the said average grain size, and a tetrazolium specified compound.

Abstract: Process of forming a high-contrast silver image which process comprises treating a light-sensitive silver halide photographic material comprising a support, a silver halide emulsion layer coated thereon and another hydrophilic colloidal layer, at least one of which contains a substantially non-diffusible compound having oxidation power on a hydroquinone developing agent, with a developer containing no hydroquinone developing agent after exposed imagewise.

Abstract: Process for forming high-contrast silver images which comprises treating a light-sensitive silver halide photographic material provided with a hydrophilic colloidal layer containing a silver halide emulsion layer coated on a support and containing a tetrazolium compound, after imagewise exposure, with a developer and/or a processing solution prior to the developing, both of which contains at least a nitrogen-containing heterocyclic compound substituted with at least mercapto, thioketone or thioether group.

Abstract: A light-sensitive silver halide photographic material containing at least one compound selected from the compounds represented by the following general formula (I) and at least one compound selected from compounds represented by the following general formula (II): ##STR1## General formula (I) wherein Z represents a non-metal atomic group necessary for forming a pyrroline, thiazoline or selenazoline ring, Y.sub.1 represents oxygen, sulfur, selenium or an N-R.sub.3 group (in which R.sub.3 represents an alkyl-, alkenyl- or aryl-group), R represents hydrogen or lower alkyl, and R.sub.1 and R.sub.2 individually represent an alkyl-, alkenyl- or aryl-group; General formula (II) ##STR2## wherein P represents ##STR3## (in which R.sub.5 and R.sub.6 individually represent an alkyl-, alkenyl- or aryl-group), Y.sub.2 represents oxygen, sulfur, selenium, or an >N-R.sub.7 group (in which R.sub.7 represents an alkyl-, alkenyl- or aryl-group), and R.sub.4 represents an alkyl-, alkenyl- or aryl-group.