Method for manufacturing lithographic printing plates

A technology of lithographic printing plate and original plate, which is applied in the direction of photographic plate-making process, instrument, optics, etc. on the pattern surface, and can solve the problems of pollution resistance degradation and so on

Active Publication Date: 2013-06-26
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is a problem that even when a plate developed in a single bath by this technique is fired to enhance printing resistance, hot-melt particles brought out from the undeveloped portion with the glue solution are not completely recovered by treatment with the surface treatment liquid. removed, and eventually fused to the non-image portion during the subsequent firing process, resulting in significant deterioration in stain resistance

Method used

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  • Method for manufacturing lithographic printing plates
  • Method for manufacturing lithographic printing plates
  • Method for manufacturing lithographic printing plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 27 and comparative example 1 to 15

[0443] (Preparation of Lithographic Printing Plate Precursor (1))

[0444]

[0445] An aluminum sheet (material 1050, heat-refined H16) of 0.24 mm thickness was dipped in a 5% aqueous sodium hydroxide solution kept at 65° C., subjected to degreasing treatment for 1 minute, and washed with water. The degreased aluminum flakes were then dipped in 10% aqueous hydrochloric acid for one minute to neutralize them, and then washed with water. Next, the surface of the aluminum sheet is subjected to AC current at 25°C and 100A / dm 2 Electrolytic roughening was performed in a 0.3% by weight hydrochloric acid aqueous solution for 60 seconds under the condition of a current density of , and then a desmutting treatment was performed in a 5% sodium hydroxide aqueous solution maintained at 60° C. for 10 seconds. For decontamination and roughened aluminum sheet at 10A / dm 2 Anodization was performed in 15% sulfuric acid aqueous solution at 25° C. at a current density of 15 V, and then made ...

Embodiment 28 to 159 and comparative example 1 to 39

[0513] (Preparation of Lithographic Printing Plate Precursor (2))

[0514]

[0515] A degreasing treatment was performed at 50° C. for 30 seconds using a 10% by weight aqueous solution of sodium aluminate to remove rolling oil from the surface of an aluminum sheet (material JIS A 1050) having a thickness of 0.3 mm. Subsequently, three nylon brushes planted with bristle tufts with a diameter of 0.3 mm and a pumice stone with a median diameter of 25 μm (specific gravity: 1.1 g / cm 3 ) to grit the aluminum surface, after which it was thoroughly washed with water. Thereafter, the sheet was etched by immersing it in a 25% by weight aqueous sodium hydroxide solution at 45° C. for 9 seconds. After washing with water, the pieces were dipped in 20% by weight aqueous nitric acid solution for a further 20 seconds at 60° C. and washed with water. At this time, the etching degree of the grained surface is about 3g / m 2 .

[0516] Next, electrochemical surface roughening was performed c...

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Abstract

Provides is a method for manufacturing lithographic printing plates with good print durability and print staining properties, in which the content of organic solvents with pH levels close to neutral is small, the quantity of chemicals employed is low, the quantity of waste solution generated is small, and processing can be conducted in a single bath. The method for manufacturing lithographic printing plates comprises (A) exposing to a negative-type lithographic printing plate precursor comprising an image-forming layer that is curable by exposure to light on a support having a hydrophilic surface; (B) developing with a developer having a pH of 4 to 10 the negative-type lithographic printing plate precursor that has been exposed; (C) treating with a burning surface-treatment liquid the negative-type lithographic printing plate precursor that has been developed; and (D) subjecting the negative-type lithographic printing plate precursor to a burning treatment; and by an interval between the developing (B) and the treating with a burning surface-treatment liquid (C) of from 1 minute or more to 10 hours or less, during which time no water-washing or gumming is incorporated.

Description

Technical field [0001] The invention involves a method for manufacturing a flat version of the printing version. Background technique [0002] Generally, the flat version of the printing version consists of the hydraulic image part of the ink during the printing process and the hydrophilic non -image department that receives the liquid liquid.In the flat version of the printing version, the mutual rejection of water and the foundation ink is adopted.The liquid image department of the flat version of the printing version becomes the ink acceptance department, and the hydrophilic non -image department becomes the liquid reception department (non -ink acceptance department).This leads to the difference in ink attachment on the surface of the flat version of the printing version.In this printing method, once the ink is accumulated on the image part, the ink is transferred to the printing medium such as paper. [0003] To create a flat version of the printing version, the original ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00G03F7/32
CPCG03F7/40G03F7/405
Inventor 园川浩二
Owner FUJIFILM CORP
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