Abstract: Provided are a lithographic printing plate precursor for furnishing a lithographic printing plate in which adhesion to interleaving paper is prevented, contamination inside a device is prevented, and edge stain does not occur; a method of producing the same; and a printing method using the same. The lithographic printing plate precursor includes: a support; and an image recording layer on the support, in which a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least-one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m2 or greater.

Abstract: A lithographic printing plate precursor, comprising a layer arrangement according to any one of the following (i) to (iv): (i) a support and an image recording layer; (ii) a support, an undercoat layer, and an image recording layer; (iii) a support, an image recording layer, and a protective layer; or (iv) a support, an undercoat layer, an image recording layer, and a protective layer, wherein: a layer containing a hydrophilic agent is included in the layer arrangement between the support and an innermost layer, between adjacent layers, or on an outermost layer other than the protective layer, the layer containing a hydrophilic agent contacts a region of at least one of, but not all of, the support, the undercoat layer, the image recording layer, or the protective layer, and an amount of sag of an end portion of the lithographic printing plate precursor is from 30 ?m to 150 ?m.

Abstract: A method for producing a lithographic printing plate includes, in this order, a step of preparing a lithographic printing plate precursor having an image-recording layer on a hydrophilic support, a step of exposing the lithographic printing plate precursor in an image shape, and a step of removing a non-exposed portion of the image-recording layer exposed in the lithographic printing plate precursor using a developer, the developer includes a compound having at least one acidic group selected from the group consisting of a phosphate group, a phosphonate group, and a phosphinate group and one or more carboxy groups, a pH of the developer is 5 to 10, and, after the removal step, a step of washing a surface of an obtained lithographic printing plate with water and a step of desensitizing the surface of the obtained lithographic printing plate are not provided.

Abstract: Provided are a lithographic printing plate precursor for furnishing a lithographic printing plate in which adhesion to interleaving paper is prevented, contamination inside a device is prevented, and edge stain does not occur; a method of producing the same; and a printing method using the same. The lithographic printing plate precursor includes: a support; and an image recording layer on the support, in which a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least-one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m2 or greater.

Abstract: Provided are a lithographic printing plate precursor for furnishing a lithographic printing plate in which adhesion to interleaving paper is prevented, contamination inside a device is prevented, and edge stain does not occur; a method of producing the same; and a printing method using the same. The lithographic printing plate precursor includes: a support; and an image recording layer on the support, in which a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m2 or greater.

Abstract: Provided are a planographic printing plate precursor for furnishing a planographic printing plate in which edge stain does not occur, adhesion to interleaving paper is prevented, and the water width with respect to edge stain at the time of printing is wide; a method of producing the same, and a printing method using the same. The planographic printing plate precursor including: a support; an image recording layer formed on the support; and a water-soluble compound having a molecular weight in a range of 60 to 300 and a solubility of 10 g/L or greater in water at 20° C., in which a content of the compound per unit area in a region on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than a content of the compound per unit area in a second region other than the first region by an amount of 50 mg/m2 or greater.

Abstract: A lithographic printing plate precursor, comprising a layer arrangement according to any one of the following (i) to (iv): (i) a support and an image recording layer; (ii) a support, an undercoat layer, and an image recording layer; (iii) a support, an image recording layer, and a protective layer; or (iv) a support, an undercoat layer, an image recording layer, and a protective layer, wherein: a layer containing a hydrophilic agent is included in the layer arrangement between the support and an innermost layer, between adjacent layers, or on an outermost layer other than the protective layer, the layer containing a hydrophilic agent contacts a region of at least one of, but not all of, the support, the undercoat layer, the image recording layer, or the protective layer, and an amount of sag of an end portion of the lithographic printing plate precursor is from 30 ?m to 150 ?m.

Abstract: Provided is a planographic printing plate precursor including: a support; and an image recording layer formed on the support, in which the content of fine particles per unit area in a region on a plate surface on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than the content of the fine particles per unit area in a region other than the region by an amount of 10 mg/m2 or greater, edge stains are not generated therein, and transferring of the image recording layer is prevented even in a case where planographic printing plate precursors are stored in a stacked state. Further, provided are a method of producing the same and a printing method using the same.

Abstract: Provided are a lithographic printing plate precursor for furnishing a lithographic printing plate in which adhesion to interleaving paper is prevented, contamination inside a device is prevented, and edge stain does not occur; a method of producing the same; and a printing method using the same. The lithographic printing plate precursor includes: a support; and an image recording layer on the support, in which a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m2 or greater.

Abstract: Provided are a planographic printing plate precursor for furnishing a planographic printing plate in which edge stain does not occur, adhesion to interleaving paper is prevented, and the water width with respect to edge stain at the time of printing is wide; a method of producing the same, and a printing method using the same. The planographic printing plate precursor including: a support; an image recording layer formed on the support; and a water-soluble compound having a molecular weight in a range of 60 to 300 and a solubility of 10 g/L or greater in water at 20° C., in which a content of the compound per unit area in a region on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than a content of the compound per unit area in a second region other than the first region by an amount of 50 mg/m2 or greater.

Abstract: Provided is a planographic printing plate precursor including: a support; and an image recording layer formed on the support, in which the content of fine particles per unit area in a region on a plate surface on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than the content of the fine particles per unit area in a region other than the region by an amount of 10 mg/m2 or greater, edge stains are not generated therein, and transferring of the image recording layer is prevented even in a case where planographic printing plate precursors are stored in a stacked state. Further, provided are a method of producing the same and a printing method using the same.

Abstract: Provided is a method for processing an on-press development-type lithographic printing plate precursor and a printing method which do not cause edge stains and in which there are no stains in an unexposed portion other than an edge portion, and a lithographic printing plate having a wide water width during printing with respect to the edge stains is provided, through a method for processing an on-press development-type lithographic printing plate precursor having an image recording layer on a support in which a region within 1 cm from an end portion on a plate surface of the lithographic printing plate precursor is coated with a processing liquid containing a hydrophilizing agent after subjecting the on-press development-type lithographic printing plate precursor to image exposure, before mounting the on-press development-type lithographic printing plate precursor on a printing press, and which is performed such that a coating member does not come into contact with the plate surface, and a printing method.

Abstract: An object of the present invention is to provide a manufacturing method for a lithographic printing plate precursor which can simplify a manufacturing step while maintaining the performance of preventing edge stains and in which there are neither setter contaminations nor vendor contaminations; the lithographic printing plate precursor; a plate manufacturing method for a lithographic printing plate; and a printing method using the above-described lithographic printing plate.

Abstract: Disclosed are a processing liquid and a processing method that can favorably perform plate inspection of an on-press development-type lithographic printing plate precursor and image quality control, by using a processing liquid of a lithographic printing plate precursor having an image recording layer formable of an image by removing an unexposed region with at least one of printing ink and dampening water, the processing liquid containing a basic coloring dye expressed by General Formula (I) below and an anionic surfactant having an aromatic ring: wherein each of R1 to R14 independently represents a hydrogen atom and an alkyl group having 1 to 4 carbon atoms, R10 and R14 may be bonded to each other to form a single bond, Ar1 represents a phenylene group or a naphthylene group, Ar2 represents an aryl group, and X? represents SO3? or COO?.

Abstract: Provided is a lithographic printing plate precursor having extremely excellent on-board developability while maintaining printing durability and having excellent preservation stability, by a lithographic printing plate precursor including, on a support, an image recording layer containing (A) a thermoplastic fine particle polymer; (B) an infrared ray absorption agent; and (C) a polyglycerol compound, in which the polyglycerol compound is a compound having three or more structural units selected from structural units expressed by General Formulae (1) and (2) below, where General Formulae (1) and (2), A represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkyl carbonyl group having 2 to 5 carbon atoms.

Abstract: Disclosed are a processing liquid and a processing method that can favorably perform plate inspection of an on-press development-type lithographic printing plate precursor and image quality control, by using a processing liquid of a lithographic printing plate precursor having an image recording layer formable of an image by removing an unexposed region with at least one of printing ink and dampening water, the processing liquid containing a basic coloring dye expressed by General Formula (I) below and an anionic surfactant having an aromatic ring: wherein each of R1 to R14 independently represents a hydrogen atom and an alkyl group having 1 to 4 carbon atoms, R10 and R14 may be bonded to each other to form a single bond, Ar1 represents a phenylene group or a naphthylene group, Ar2 represents an aryl group, and X? represents SO3? or COO?.

Abstract: The invention provides a method of concentrating a waste liquid produced by development, the method including: obtaining a waste liquid produced by: exposing a planographic printing plate precursor, including: an image recording layer including: an infrared absorbing dye, a polymerization initiator, and a polymerizable compound, and a protective layer on a support, and performing a development process by using a developer liquid that contains an anionic surfactant having a naphthalene skeleton and/or a nonionic surfactant having a naphthalene skeleton in an amount of 1-10% by mass, that contains an organic solvent that has a boiling temperature in a range of 100-300° C. in an amount of 2% by mass or less, and that has a pH of 6.0-9.5; and evaporation-concentrating the waste liquid such that [an amount of the waste liquid after the concentration/an amount of the waste liquid before the concentration] is from 1/10 to 1/2 on a volume basis.

Abstract: A method for preparing a lithographic printing plate includes treating a lithographic printing plate precursor including a hydrophilic support and an image-forming layer containing the following (i) to (iii) with an aqueous solution having a buffering ability: (i) a binder polymer comprising a repeating unit having a structure represented by the following formula (1); (ii) an ethylenically unsaturated compound; and (iii) a polymerization initiator, P-L-(CO2H)n??(1) wherein P represents a part constituting a main chain skeleton of the polymer, L represents an (n+1) valent connecting group, and n represents an integer of 1 or more.

Abstract: The present invention provides a curable composition containing at least one species selected from polymerizable monomers represented by the following formulas (I) to (III) and a polymerization initiator, and a planographic printing plate precursor including the same. The curable composition can be cured with high sensitivity due to laser light exposure or the like, and the inhibition of polymerization due to oxygen is controlled. The composition has excellent solubility in a developer or a solvent.

Abstract: A composition comprising: a polymerized substance of a compound (I) that contains m numbers of RSi(O0.5)3 units, wherein m represents an integer of from 8 to 16; and R's each independently represents a non-hydrolysable group, provided that at least two among R's represent groups containing a vinyl group or an ethynyl group, and wherein each one of the RSi(O0.5)3 units is connected to another one of the RSi(O0.5)3 units by sharing an oxygen atom in each one of the RSi(O0.5)3 units, so as to form a cage structure, and wherein within a solid component contained in the composition, a polymerized substance formed by a reaction of the compound (I) represents 60 mass % or more.