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PREVENTION OF PRINT SCUMMING OF OFFSET ROTARY PRESS FOR NEWSPAPER AND DUMMY PLATE FOR PREVENTING PRINT SCUMMING
PREVENTION OF PRINT SCUMMING OF OFFSET ROTARY PRESS FOR NEWSPAPER AND DUMMY PLATE FOR PREVENTING PRINT SCUMMING
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机译：防止报纸和胶版胶印机旋转胶印污染
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摘要
PROBLEM TO BE SOLVED: To realize the prevention of print scumming from being generated at a color printing unit at a low cost when printing is performed with a fewer number of colors than the largest number of color available with the color printing unit, in an offset rotary press with the color printing unit in a newspaper printing field. ;SOLUTION: This method for preventing the print scumming of an offset rotary press from occurring is top print an image by attaching a PET film with a hydrophilic face to a plate cylinder not performing the printing. In addition, a folding part to be mounting on a printing press forms the film under thermal pressure. Further, a hydrophilic layer consisting of an organic binding agent is provided after a corona discharge process and/or a latex applying process. Besides, the hydrophilic layer is constituted of plural layers. The organic binding agent is at least selected from among gelatin, a polyvinyl alcohol composition and a cellulose derivative. The hydrophilic layer also contains at least one selected from among titanium oxide, silicon dioxide and aluminum oxide. The latex is a vinylidene chloride polymer and/or its copolymer.;COPYRIGHT: (C)1997,JPO
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