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Planographic printing original plate, and method for manufacturing planographic printing original plate

A technology for lithographic printing plates and original plates, which is applied in the field of manufacturing original lithographic printing plates and original plates of lithographic printing plates.

Active Publication Date: 2020-10-30
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a rotary printing machine such as newspaper printing is used to continuously print on roll paper, since the end of the printing plate becomes the surface of the roll paper, the ink adhering to the end is transferred to the paper and becomes a linear stain. (Edge contamination), so that the commercial value of the printed matter is significantly impaired

Method used

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  • Planographic printing original plate, and method for manufacturing planographic printing original plate
  • Planographic printing original plate, and method for manufacturing planographic printing original plate
  • Planographic printing original plate, and method for manufacturing planographic printing original plate

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Embodiment

[0388] Hereinafter, although an Example demonstrates embodiment of this invention in detail, this invention is not limited to these.

[0389] First of all, the methods for producing the support, the method for forming the undercoat layer, the method for forming the image recording layer, the method for forming the protective layer, the method for forming the resin layer (back coat layer), the method for forming the resin layer (back coat layer), and The coating method of an ink repellent agent is demonstrated.

[0390]

[0391] Each of the following treatments (a) to (f) was sequentially performed on the aluminum plate to prepare an aluminum support having an anodized film (support (1)). In addition, water washing treatment was implemented between all the treatment steps.

[0392] (a) Alkali etching treatment

[0393] An aqueous solution having a sodium hydroxide concentration of 25% by mass, an aluminum ion concentration of 100 g / L, and a temperature of 60° C. was sprayed...

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Abstract

Provided are a planographic printing original plate in which an image formation region during printing on a newspaper surface is ensured and edge blotting is eliminated, and a method for manufacturingthe planographic printing original plate. A planographic printing original plate (10b) having an image recording layer (16) on an aluminum support body (12) that has an anodic oxidation film (14), wherein: an end part of the planographic printing original plate (10b) has an undercut shape in which the undercut amount (X) is 25-150 [mu]m and the undercut width (Y) is 70-300 [mu]m, contains an infrared absorber in the image recording layer (16), and has an undercut shape; and an ink-repellent agent (44) is provided to a part or the entirety of two side surfaces facing the aluminum support (12).

Description

technical field [0001] The invention relates to a lithographic printing plate precursor and a method for manufacturing the lithographic printing plate precursor, in particular to a newspaper-oriented lithographic printing plate precursor and a manufacturing method for the lithographic printing plate precursor. Background technique [0002] A typical lithographic printing plate consists of an oleophilic image portion that receives ink during printing and a hydrophilic non-image portion that receives fountain solution. Lithographic printing is a method in which the lipophilic image portion of a lithographic printing plate is used as an ink-receiving portion, and the hydrophilic non-image portion is used as a fountain solution-receiving portion (ink non-receiving portion) by utilizing the property that water and oily ink repel each other. , A difference in the adhesion of the ink occurs on the surface of the lithographic printing plate, and after the ink is applied only to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N1/14G03F7/00G03F7/004
CPCG03F7/00G03F7/004B41C2210/04B41N1/083B41C1/1016B41C2201/02B41N3/034B41C2201/04B41C2210/06B41C2210/14B41N1/14
Inventor 池山裕介曾根信幸难波优介大岛笃
Owner FUJIFILM CORP
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