Abstract:
PROBLEM TO BE SOLVED: To provide an original lithographic printing plate which is excellent in resistance to plate wear/print smear and resistance to micro-corrosion stain and can develop an image aboard the machine. SOLUTION: The original plate of lithographic printing plate has a photosensitive layer comprising a sensitizing dye (A), a polymerization initiator (B), a polymerizable compound (C) and a binder polymer (D), and a protective layer in this order on a support, wherein the substrate is made by using an aluminum alloy plate wherein the density, on the surface, of an inter-metallic compound having a circle-equivalent diameter of 0.2 μm or more is 35,000 pieces/mm 2 or more, and the number of aluminum carbide having the maximum length of 1 μm or more is 30,000 pieces/g or less. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation:要解决的问题:提供一种原始的平版印刷版,其具有优异的耐板/磨损/印刷污迹和耐微腐蚀污点,并可以在机器上形成图像。 平版印刷版原版具有包含敏化染料(A),聚合引发剂(B),聚合性化合物(C)和粘合剂聚合物(D)的感光层,以及保护层 该载体上的顺序为,其中通过使用铝合金板制造基板,其中表面上具有圆当量直径为0.2μm以上的金属间化合物的密度为35,000个/ mm 2 SP>以上,最大长度为1μm以上的碳化铝的数量为30,000个/ g以下。 版权所有(C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a lithographic printing plate which generates even pits during the electrolytic processing and causes no streaks when processed as a printing plate. SOLUTION: The aluminum alloy sheet for a lithographic printing plate includes 0.1 to 0.5% of Mg, 0.03 to 0.15% of Si, 0.2 to 0.6% of Fe, 0.005 to 0.05% of Ti, and 2 to 30 ppm of Pb, with the balance of aluminum and unavoidable impurities, the average recrystallized grain diameter of 50 μm or less in the surface part in the direction perpendicular to the rolling direction, the Mg concentration in the surface part of 0.2 μm deep from the surface of 1.2 to 10 times the average Mg concentration, the Pb concentration in the surface part of 0.2 μm deep from the surface of 3 to 25 times the average Pb concentration, the amount of the Mg deposited in the matrix of 0.03% or less. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a substrate for a lithographic printing plate which obtains the substrate for the lithographic printing plate by using materials including used and/or unused lithographic printing plates and which is excellent in melting properties of the materials. SOLUTION: The manufacturing method of the substrate for the lithographic printing plate has a fragmenting process wherein the materials including the used and/or unused lithographic printing plates are fragmented into small pieces, a melting process wherein the materials fragmented into small pieces are melted in a melting furnace so as to obtain molten aluminum, a casting process wherein an aluminum alloy plate is obtained from the molten aluminum and a surface treatment process wherein the aluminum alloy plate is subjected to surface treatment so as to obtain the substrate for the lithographic printing plate. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a polishing method capable of attaining stable polishing with high efficiency without breakage or the like caused by warpage and cracking. SOLUTION: The surface polishing method polishes both faces of a thin-film brittle material which is 500 μm or smaller in thickness and 10 MPa*√m or smaller in breakage toughness. A total of the polishing amount of each polishing surface is set to 100 μm or smaller. With one face fixed, the other face is polished and a percentage of the polishing amount of the surface to be polished per one time is set as follows: the polishing amount of one face 2a:the polishing amount of the other face 2b=20:1 to 1:20. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a lithographic printing plate, which is manufactured by cold-rolling a hot-rolled plate into the final thickness while skipping an intermediate annealing step, has a surface layer in which Ga and Mg are concentrated, makes uniform pits formed in electrolysis treatment, and does not form a streak thereon when having been processed as a printing plate. SOLUTION: The aluminum alloy sheet has a composition including 0.03 to 0.15% Si, 0.2 to 0.7% Fe, 0.05 to 0.5% Mg, 0.003 to 0.05% Ti, 30 to 300 ppm Ga and the balance aluminum with unavoidable impurities, has recrystallized grains with an average grain size of 50 μm or smaller in a direction perpendicular to the rolling direction, in the surface layer, contains Mg of 5 to 50 times higher concentration in the surface layer of 0.2 μm deep from the surface than the average Mg concentration, and contains Ga of 2 to 20 times higher concentration in the surface layer of 0.2 μm deep from the surface than the average Ga concentration. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an original lithographic printing plate capable of obtaining a lithographic printing plate excellent in resistance to plate wear by suppressing the occurrence of local remaining film and development scum. SOLUTION: The original lithographic printing plate has an image recording layer which contains an alkali-soluble resin and an infrared ray absorber and in which the alkali-solubility of an exposure part increases after infrared ray exposure, on a support, wherein the support is formed by using an aluminum alloy plate wherein the density, on the surface, of an inter-metallic compound having a circle-equivalent diameter of 0.2 μm or more is 35,000 pieces/mm 2 or more. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation:要解决的问题:提供能够通过抑制局部残留膜和显影浮渣的发生而获得耐板磨损性优异的平版印刷版的原版平版印刷版。 解决方案:原始平版印刷版具有包含碱溶性树脂和红外线吸收剂的图像记录层,并且其中曝光部分的碱溶性在红外线照射后增加在载体上,其中 通过使用铝合金板形成支撑体,其中表面上具有圆当量直径为0.2μm以上的金属间化合物的密度为35,000个/ mm 2 / SP以上。 版权所有(C)2011,JPO&INPIT