Abstract:
A lithographic printing plate precursor in a positive-type with an infrared-sensitivity, having a support and an image recording layer provided on the support, the support having a hydrophilic surface, the recording layer having a particular resin, an amphoteric surfactant and/or an anionic surfactant, and an infrared absorbing agent, wherein the particular resin being at least one of resins selected from the group consisting of a polyurethane resin, a poly(vinyl acetal) resin, and maleimide resin A.
Abstract:
A method for producing a planographic printing plate, including the steps of: image-wise exposing a positive type planographic printing plate precursor including an intermediate layer and a positive type image-forming layer successively on a support, the intermediate layer having a coating amount after drying of from 2 mg/m2 to 200 mg/m2 and including a polymer including a repeating unit represented by the following formula (I-1) and a repeating unit represented by the following formula (I-2); and developing the exposed positive type planographic printing plate precursor using a treatment liquid having a pH of from 7 to 12:
Abstract translation:一种平版印刷版的制造方法,包括以下步骤:在载体上依次将包含中间层和正型图像形成层的正型平版印刷版原版成像曝光,所述中间层的涂布量为 包含由下述式(I-1)表示的重复单元和下述式(I-2)表示的重复单元构成的聚合物的干燥量为2mg / m 2〜200mg / m 2。 并使用pH为7〜12的处理液显影曝光的正型平版印刷版原版;
Abstract:
A method of making a planographic printing plate, the method includes exposing, to infrared light, a planographic printing plate precursor including a recording layer provided on a substrate; and developing the precursor using an aqueous alkaline solution, in which the recording layer comprises a copolymer containing a structural unit derived from (meth)acrylonitrile and a structural unit derived from styrene, a water-insoluble and alkali-soluble resin, and an infrared absorbing agent, the solubility of the recording layer in the aqueous alkaline solution being increased by the exposure, and in which the aqueous alkaline solution has a pH of 8.5 to 10.8 and contains a betaine-based amphoteric surfactant and an ammonium salt represented by Formula (I): wherein, R1, R2, R3, and R4 each independently represent an alkyl or aryl group; the total number of carbon atoms in R1, R2, R3, and R4 is not more than 20; and X− represents a counter anion.
Abstract:
A positive-working lithographic printing plate precursor for infrared laser is provided that includes, layered sequentially above a support, a lower layer and an upper layer, the lower layer and/or the upper layer including an infrared absorbing agent, either the lower layer comprising an alkali-soluble group-containing graft copolymer or the upper layer comprising a sulfonamide group-, active imide group-, and/or amide group-containing graft copolymer, and the graft copolymer being a polyurethane resin having as a graft chain an ethylenically unsaturated monomer-derived constitutional unit. There is also provided a process for making a lithographic printing plate, the process including in sequence an exposure step of imagewise exposing by means of an infrared laser the positive-working lithographic printing plate precursor for infrared laser and a development step of developing using an aqueous alkali solution with a pH of 8.5 to 10.8.
Abstract:
A method for producing a planographic printing plate is provided, which includes: subjecting a planographic printing plate precursor to image-wise exposure, wherein the precursor includes plural recording layers at least one of which contains (A) an infrared absorbing agent on a support, the upper recording layer contains (B) a water-insoluble and alkali-soluble polymer compound having a repeating unit containing a fluoroalkyl group or a siloxane structure; and developing the precursor using an alkali developer containing (C) an ammonium salt compound represented by Formulae (C-1) to (C-3), wherein R1 represents a methyl group or the like, R2 and R3 represent a hydrocarbon group having 3 to 20 carbon atoms, R4 represents a hydrocarbon group, A represents an atomic group which forms a nitrogen-containing aliphatic ring with N+, B represents an atomic group which forms a nitrogen-containing aromatic ring with N+, and X− represents a counter anion.