Abstract: A heat-sensitive recording material is disclosed. The material comprises a support and a heat-sensitive recording layer, between which is provided an undercoat layer which comprises a first layer comprising urea-formaldehyde resin and a second layer comprising a pigment provided on the first layer. The first layer may additionally contain a pigment.

Abstract: An ink jet recording medium containing a poly(dialkanol allylamine) derivative or a poly(dialkanol modified alkylene glycol) derivative in a support or in an ink receiving layer formed on the substrate or coated on the ink receiving layer provides images or letters of high density and of superior water resistance and light resistance.

Abstract: Disclosed is a silver halide photographic light sensitive material which has a silver halide emulsion layer optically sensitized with a sensitizing dye having a maximum spectral sensitivity in the region of at least 700 nm, said emulsion layer containing at least one compound represented by the following formula (I) or at least one compound represented by the general formula (I) and at least one compound represented by the general formula (II) in combination: ##STR1## (wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an amino group, an acylamido group or a sulfonamido group and sum of carbon atom numbers of R.sub.1 and R.sub.2 is 3 or more.); ##STR2## (wherein R.sub.3 represents an alkyl group of at least 3 carbon atoms or an aryl group).

Abstract: This invention provides a light absorbing dye for silver halide photographic light-sensitive material which is represented by the following formula [I] or [II]: ##STR1## wherein R.sub.1 and R.sub.2 which may be identical or different each represents a substituted or unsubstituted alkyl group and may link to each other to form a ring, R.sub.3 represents an alkyl group substituted with at least one sulfo group or an aryl group substituted with at least one sulfo group, R.sub.4 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a carboxy group or an alkoxycarbonyl group, and n represents an integer of 1-4; ##STR2## wherein R.sub.1 represents an alkyl group or an aryl group, R.sub.2 represents an aryl group substituted with sulfo group and R.sub.3 represents an alkyl group.

Abstract: A method for lithographic printing of paginal publications which comprises applying onto a flexible supporting base two or more lithographic printing plates arranged in the rotational direction of a master cylinder and to form such a structure with front and rear edge portions of the adjacent lithographic printing plates as to prevent penetration of damping solution between the supporting base and the lithographic printing plates, the portion of said structure receiving substantially no ink. This supporting base is mounted on a master cylinder of a printing machine and printing is carried out.

Abstract: Photographic light-sensitive materials having a coating layer containing a cation modified colloidal silica on one surface of a hydrophobic support have markedly improved antistatic properties.

Abstract: There is disclosed a silver halide photosensitive material for use under room-light wherein at least one silver halide emulsion layer contains (1) a spectrally unsensitized negative silver halide having an average grain size of 0.1 to 0.3 .mu.m and containing at least 80 mol % of silver chloride and (2) an organic desensitizer having an anodic polarographic potential and a cathodic polarographic potential which give a positive sum and this photosensitive material satisfying at least one of the following requirements:(a) said emulsion has undergone substantially no chemical ripening;a spectrally non-sensitizing dye capable of absorbing chiefly the rays in the range of from about 500 to 600 nm is contained in at least one of said photographic layers; and(c) at least one of the compounds from (i) to (v) as disclosed in the specification is contained in said emulsion layer.

Abstract: An improved process for producing double-capsules by dispersing in a hydrophobic substance a dispersion of microcapsules containing as the core material a hydrophilic substance or a hydrophobic substance, the latter of which is the same as or different from the first named hydrophobic substance, wherein the improvement is characterized in that the first named hydrophobic substance has a viscosity of 40 to 150,000 cps at 25.degree. C.

Abstract: An electrophotographic plate for making a printing plate is provided. Said electrophotographic plate comprises an electrically conductive and hydrophilic base and a photoconductive layer provided thereon, said photoconductive layer containing an alkali and/or alcohol soluble polymer, a phtalocyanine pigment and a compound represented by the formula (I):(X).sub.n Y (I)where X represents thiobarbituric acid residue from which one hydrogen atom at 5-position has been eliminated and in which nitrogen atom in a ring may have a substituent; Y represents an n-valent substituted or unsubstituted alkylene or aralkylene residue; and n represents an integer of 2 to 4. This plate has high sensitivity and resolving power and from this plate a printing plate of high printing endurance and low printing strain can be made.

Abstract: Disclosed are a light sensitive material and a lithographic printing plate made therefrom by silver complex diffusion transfer process ree from peeling of layer during printing which comprises a polyester film support made hydrophilic by coating with an organic copolymer as a support and at least one undercoat layer, a silver halide emulsion layer and an image receiving layer containing physical development nuclei layer provided on said support in succession, said undercoat layer contiguous to the support containing a polyfunctional epoxy compound having at least three epoxy groups in molecule.

Abstract: Disclosed is a process of developing images formed on a photosensitive material for electrophotography which does not cause the fogging originated from a pair of squeeze rolls made of materials different from each other and which includes the steps of developing the images with a liquid developer of the positive type containing a compound having a polyoxyethylene group or at least one compound selected from the group consisting of phosphate, sulfate and sulfonate salts having a group soluble in the carrier liquid and free from polyoxyethylene group.

Abstract: An ink jet recording sheet which comprises a transparent support and, provided thereon, at least one ink-receiving layer which is a light transmission layer containing an emulsion polymerized composition can form a color image of high resolution and high color density and the recorded sheet is suitable for overhead projector.

Abstract: There is disclosed a thermosensitive recording material improved in thermal response and image retention which comprises a support and, provided thereon, a thermosensitive recording layer containing a generally colorless or slightly colored dye precursor and a developer which, upon being heated, reacts with said dye precursor to develop color, wherein said thermosensitive recording layer contains as sensitizer a compound selected from a group consisting of p-benzylbiphenyl, diaryl esters of adipic acid, ##STR1## (wherein R represents a substituted or unsubstituted aralkyl group, ##STR2## (wherein R.sub.1 and R.sub.2 each represents an alkyl, aralkyl, or aryl group), and ##STR3## and said developer is bis(3-allyl-4-hydroxyphenyl)sulfone.

Abstract: There is provided a method for making a lithographic printing plate having high sensitivity, resolving power and printing endurance and free from scumming utilizing silver complex diffusion transfer process which comprises subjecting to scanning exposure of high-intensity short-time a light sensitive material comprising a support and, provided thereon, at least a silver halide emulsion layer and a physical development nuclei layer as a surface layer and then developing it with a silver complex diffusion transfer developer, the improvement which comprises subjecting the light sensitive material to imagewise exposure with scanning light of at least 700 nm, said emulsion layer containing silver halide grains mainly composed of silver chloride and a sensitizing dye having a sensitivity maximum in the long wavelength region of at least 700 nm in an amount of 3.times.10.sup.-5 -3.times.10.sup.

Abstract: Disclosed is a process for producing a liquid developer for electrostatic photography which comprises a highly insulating hydrocarbon medium and resin particles dispersed therein, said process comprising polymerizing a monomer (A) soluble in said medium, but insolubilized upon being polymerized in the presence of a polymer (S) insoluble in said medium and having a carboxyl group, a hydroxyl group or an amide group. In this process, a monomer (B) soluble in said medium and still soluble upon being polymerization and/or a monomer (C) having at least two polymerizable unsaturated double bonds may also be polyumerized.

Abstract: Blocking between emulsion layer and backcoating layer and haze of the emulsion surface which often occur when silver halide photographic papers are stored in the form of a roll or a stack can be avoided or reduced by providing a silver halide photographic paper comprising a support coated with a resin on both sides where the surface roughness of the resin layer provided on the side where emulsion layer is not present is within the range of 0.7-2.5 .mu. in terms of center line average height Ra according to JIS B0601. This effect is conspicuous in reduction of blocking and haze which severely occur in the photographic paper where the developer is contained in the photographic layer.

Abstract: A silver halide photographic emulsion comprising as major constituent silver bromide with improved gradation, density and sensitivity and decreased fog is disclosed. This emulsion contains at least one of the compounds represented by the general formula ##STR1## wherein Z represents an aromatic radical, or of the oxidized derivatives thereof, and at least one of the compounds represented by the general formula ##STR2## wherein A represents a hydroxyl group, an amino group, ##STR3## R.sub.1 and R.sub.2 form a ring jointly with the carbon atom to which R.sub.1 and R.sub.2 are attached or one of R.sub.1 and R.sub.2 represents a hydrogen atom and the other represents a hydrogen atom, an alkyl group, an aryl group, or a hydroxyl group; n is 0 or an integer of 1 to 8, and M represents a hydrogen atom or an alkali metal.

Abstract: A method of treating an aqueous sodium sulfide solution, such as white liquor in kraft pulping systems, for the oxidation of the sulfide with oxygen in the presence of a specific activated carbon catalyst which is (a) a particulate activated carbon catalyst having an average particle diameter of 0.2-4 mm, a pore volume of at least 0.25 cc/g in pores with diameters of not smaller than 100 .ANG. and a pore volume of at least 35% of the total pore volume in pores with diameters of not smaller than 100 .ANG. or (b) a fibrous activated carbon catalyst having a specific surface area of 300-2500 m.sup.2 /g and an outer surface area of 0.1-5 m.sup.2 /g.

Abstract: A thermal transfer material having a heat resistant layer on a base film, said heat resistant layer having an average surface roughness of 0.15 to 0.35 .mu.m and projections of 0.35 to 1.00 .mu.m high in number of 50 or more per mm.sup.2 on the surface thereof, is excellent in image quality and stability thereof without causing sticking to a thermal head.

Abstract: This invention provides a negative-charging liquid developer for electrostatic photography excellent in charge stability and dispersion stability which comprises a highly insulating carrier liquid in which resin particles containing a charge control agent are dispersed, said charge control agent being a carboxylic acid amine salt which comprises a polycarboxylic acid compound insoluble in said carrier liquid and a high molecular amino compound soluble in said carrier liquid.