Abstract: A silver halide photographic material having on a support at least one silver halide emulsion layer is disclosed, wherein the silver halide emulsion layer comprises a silver halide emulsion containing an oxidizing agent added thereto before chemical ripening of the emulsion, and the silver halide emulsion or a hydrophilic colloid layer contains a hydrazine derivative.

Abstract: A negative silver halide photographic material comprising a support having provided thereon at least one light-sensitive silver halide emulsion layer and further provided on the light-sensitive halide layer at least two light-insensitive hydrophilic colloidal layers, the uppermost layer of the light-insensitive hydrophilic colloidal layers containing colloidal silica and the emulsion layer or other hydrophilic colloidal layer containing a hydrazine derivative. The material exhibits super-high contrast and is less susceptible to scratch fog.

Abstract: An image forming process capable of providing photographic images having extremely high contrast and high resolution for use in photoengraving is disclosed, which comprises processing an image-wise exposed silver halide light-sensitive material having at least two silver halide emulsion layers on a support, one of said emulsion layers providing a contrasty gradation and the other of said emulsion layers providing a soft tone gradation, with a hydrazine contrast development system, a tetrazolium contrast development system or a lith development system, wherein the gamma (.gamma.) value of the portion having a density (D) from 0.3 to 1.5 on the characteristic curve obtained is less than 10 and the gamma (.gamma.) value of the portion having a density (D) from 1.5 to 3.0 is at least 10.

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 silver halide photographic light-sensitive material and high contrast negative image forming process using them are disclosed. The material comprises a support having thereon at least one silver halide emulsion layer in which said silver halide emulsion layer or other hydrophilic colloid layer contains at least one hydrazine derivative, at least one cationic dye selected from a cyanine dye, a hemicyanine dye and a rhodacyanine dye, and L-ascorbic acid, and has photographic characteristics of giving very high contrast of over 10 in .gamma., giving high practical Dmax and sensitivity, and causing less black peppers using a stable developer and having optimum spectral sensitivity for spectral energy distributions of various light sources.

Abstract: A negative silver halide photographic light-sensitive material is provided, having a silver halide emulsion layer, which layer comprises silver haloiodide grains prepared in the presence of an iridium salt in an amount of 1.times.10.sup.-8 to 1.times.10.sup.-5 mole per one mole of silver, wherein the silver iodide content in the surface part of said grain is larger than the average silver iodide content in said grain, and additionally containing in said emulsion layer or in some other hydrophilic colloid layer, a compound of formula (I):R.sub.1 --NHNH--CHO (I)wherein R.sub.1 represents an aliphatic group or an aromatic group. Said photographic light-sensitive material is, after being exposed imagewise, developed with a developer containing 0.15 mole/l or more sulfite ion and having a pH value of 9.5-12.3, to form negative images having ultra-high contrast.

Abstract: A photographic light-sensitive silver halide element is described comprising a support, at least one light-sensitive silver halide emulsion layer and a light-scattering layer. This element is used for forming a dot image by a photographic exposure using laser through a contact screen. The light-scattering layer is provided in such a manner that the silver halide emulsion layer is exposed to laser through the light-scattering layer.

Abstract: A method of forming an image which comprises development processing an image-wise exposed silver halide photosensitive element in the presence of at least one compound represented by the following general formula (I): ##STR1## wherein X.crclbar. represents an anion; R.sub.1 represents a --Y--R.sub.3 group, a --Y--COOR.sub.3 group, a --Y--OCOR.sub.3 group, a --Y'--COO--Y--OCO--R.sub.3 group, a --Y'--OCO--Y--COO--R.sub.3 group or a --Y'--COO--Y--COO--R.sub.3 group; Y represents an alkylene group having 1 to 18 carbon atoms, an arylene group or an aralkylene group; R.sub.3 represents an alkyl group having 1 to 18 carbon atoms, an aryl group, an aralkyl group, a ##STR2## group or a ##STR3## group; R.sub.4 represents an alkyl group having 1 to 18 carbon atoms, an aryl group or an aralkyl group; R.sub.2 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an oxycarbonyl group (--COOR.sub.