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DIRECT DRAWING TYPE LITHOGRAPHIC PRINTING PLATE ORIGINAL PLATE AND MANUFACTURE OF DIRECT DRAWING TYPE LITHOGRAPHIC PRINTING PLATE
DIRECT DRAWING TYPE LITHOGRAPHIC PRINTING PLATE ORIGINAL PLATE AND MANUFACTURE OF DIRECT DRAWING TYPE LITHOGRAPHIC PRINTING PLATE
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机译:直接拉伸式光刻版原版及直接拉伸制版的制造
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摘要
PROBLEM TO BE SOLVED: To improve an image reproducibility while keeping an ink mileage favorable by containing at least a compound which can be decomposed when receiving a laser radiation, and a thermo-setting compound in the heat-sensitive layer of a directly drawing type lithographic printing plate original plate wherein the heat-sensitive layer and an ink repelling layer are provided on a base sheet. ;SOLUTION: A heat-sensitive layer in this direct drawing type lithographic printing plate original plate wherein on a base sheet, the heat-sensitive layer and an ink repelling layer are provided in this order, is formed of a substance containing (a) a compound which can be decomposed by the action of a laser radiation, and (b) a thermo-setting compound. As the compound (a), ammonium nitrate, potassium nitrate, sodium nitrate, a carbonic ester compound or the like can be counted as a compound which does not absorb laser beams by the compound itself, but is decomposed by the action of another compound which absorbs laser beams. Also, as the compound (b), a novolac resin, a resol resin, a phenol-furfural resin or the like can be counted, and as the ink repelling layer, a silicone rubber layer is used.;COPYRIGHT: (C)2000,JPO
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