Abstract:
A negative image-recording material for heat-mode exposure, which is able to form images by heat-mode exposure, comprises (A) a polyurethane resin having at least one or more side-chain branches of the following general formulae (1) to (3) which polyurethane resin is soluble in an alkaline aqueous solution, (B) a photo-thermal converting agent, and (C) a compound capable of generating a radical through heat-mode exposure to light of a wavelength which can be absorbed by the photo-thermal converting agent. In formulae (1) to (3), R1 to R11 each independently represents a monovalent organic group; X and Y each independently represents an oxygen atom, a sulfur atom, or nullN(R12)null; Z represents an oxygen atom, a sulfur atom, nullN(R13)null, or an optionally-substituted phenylene group; R12 represents a hydrogen atom or a monovalent organic group; and R13 represents a hydrogen atom or a monovalent organic group. 1
Abstract translation:能够通过热模式曝光形成图像的用于热模式曝光的负型图像记录材料包括(A)具有至少一个或多个以下通式(1)至 (3)哪种聚氨酯树脂可溶于碱性水溶液中,(B)光热转换剂,和(C)能够通过热模式暴露于能够被 光热转换剂。 式(1)〜(3)中,R 1〜R 11各自独立地表示1价有机基团。 X和Y各自独立地表示氧原子,硫原子或-N(R 12) - ; Z表示氧原子,硫原子,-N(R13) - 或任选取代的亚苯基; R 12表示氢原子或一价有机基团; R 13表示氢原子或一价有机基团。
Abstract:
A method for making a lithographic printing plate according to the silver salt diffusion transfer process image-wise exposes an imaging element with a high intensity short time scanning exposure. The imaging element comprises on a support in the order given a silver halide emulsion layer and a layer containing physical development nuclei. A thus obtained image-wise exposed imaging element is subsequently developed in the presence of a developing agent and silver halide solvent. The image-wise exposure is focused substantially within the silver halide emulsion layer of the imaging element. The present invention further provides an apparatus for carrying out the above method.
Abstract:
An apparatus for making a lithographic printing plate according to the silver salt diffusion transfer process image-wise exposes an imaging element with a high intensity short time scanning exposure. The imaging element comprises on a support in the order given a silver halide emulsion layer and a layer containing physical development nuclei. A thus obtained image-wise exposed imaging element is subsequently developed in the presence of a developing agent and silver halide solvent. The image-wise exposure is focused substantially within the silver halide emulsion layer of the imaging element.
Abstract:
The invention is directed to a lithographic printing plate precursor including, in the following order: a support; an image-recording layer containing a radical polymerizable compound and a radical polymerization initiator; and a protective layer containing a star polymer, and the star polymer is preferably a polymer in which from 3 to 10 polymer chains are branched from a central skeleton.
Abstract:
A lithographic printing plate precursor which is excellent in both the on-press development property and the printing durability and which is excellent particularly in the on-press development property after preservation for a long period of time, wherein the lithographic printing plate precursor includes an intermediate layer containing a polymer compound including a repeating unit (a1) having a support-adsorbing group and a repeating unit (a2) having a polyoxyalkylene group having a repeating number of oxyalkylene units from 8 to 120 between a support and a polymerizable image-recording layer, and contains a compound having a molecular weight of 1,500 or less and having an oxyalkylene group in at least any of the intermediate layer and the polymerizable image-recording layer.
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 process for making a lithographic printing plate that includes in sequence an exposure step of imagewise exposing by means of an infrared laser a lithographic printing plate precursor that has provided above a support a positive-working recording layer including (Component A) a (meth)acrylonitrile-derived monomer unit- and styrene-derived monomer unit-containing copolymer, (Component B) a water-insoluble and alkali-soluble resin, and (Component C) an infrared absorbing agent and a development step of developing, using an aqueous alkali solution including a betaine-based surfactant or a nonionic surfactant, the aqueous alkali solution having a pH of 8.5 to 10.8, by removing an exposed area of the positive-working recording layer whose solubility in aqueous alkali solution has been increased by the exposure. There is also provided a lithographic printing plate made by the process for making a lithographic printing plate.
Abstract:
To provide a coloring photosensitive composition and a lithographic printing plate precursor, ensuring that coloring stability after exposure by infrared laser exposure is good and high coloring is obtained even when exposed after the elapse of time. These can be a coloring photosensitive composition containing a microgel encapsulating (A) a polymer having a glass transition temperature of 50° C. or more, (B) a photoinitiator, and (C) an infrared absorbing dye, and a lithographic printing plate precursor having an image-recording layer containing the composition.
Abstract:
A lithographic printing plate precursor includes, in the following order: a support; an image-recording layer which is capable of forming an image by removing an unexposed area by an automatic development processor in the presence of a developer having pH of from 2 to 14 after exposure and contains (A) a sensitizing dye, (B) a polymerization initiator, (C) a polymerizable compound and (D) a polymer which is insoluble in water and alkali-soluble; and a protective layer, and the protective layer contains (E) a hydrophilic polymer which has a repeating unit represented by the formula (1) as defined herein and a repeating unit represented by the formula (2) as defined herein and a sum of the repeating unit represented by the formula (1) and the repeating unit represented by the formula (2) is at least 95% by mole based on total repeating units constituting the polymer.
Abstract:
A lithographic printing plate precursor which is excellent in both the on-press development property and the printing durability and which is excellent particularly in the on-press development property after preservation for a long period of time, wherein the lithographic printing plate precursor includes an intermediate layer containing a polymer compound including a repeating unit (a1) having a support-adsorbing group and a repeating unit (a2) having a polyoxyalkylene group having a repeating number of oxyalkylene units from 8 to 120 between a support and a polymerizable image-recording layer, and contains a compound having a molecular weight of 1,500 or less and having an oxyalkylene group in at least any of the intermediate layer and the polymerizable image-recording layer.