Aluminum support for lithographic printing plate and lithographic printing plate original plate

A technology of lithographic printing plates and supports, which is applied in lithographic printing equipment, printing, printing technology, etc., can solve the problems of water margin narrowing, etc., and achieve the effect of excellent printing durability and excellent on-machine developability

Active Publication Date: 2019-01-04
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the so-called water allowance is narrowed

Method used

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  • Aluminum support for lithographic printing plate and lithographic printing plate original plate
  • Aluminum support for lithographic printing plate and lithographic printing plate original plate
  • Aluminum support for lithographic printing plate and lithographic printing plate original plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0298] 〔Production of aluminum supports for lithographic printing plates〕

[0299] In order to remove rolling oil from the surface of an aluminum plate (material JIS A 1050) having a thickness of 0.3 mm, degreasing treatment was performed at 50° C. for 30 seconds using a 10 mass % sodium aluminate aqueous solution.

[0300] Then, use 3 bundled nylon brushes with a bristle diameter of 0.3 mm and a pumice-water suspension (specific gravity 1.1 g / cm2) with a median particle size of 25 μm 3 ) the surface of the aluminum plate is grained and washed with water.

[0301] Next, the aluminum plate was etched by immersing in 25 mass % sodium hydroxide aqueous solution at 45 degreeC for 9 seconds, and after washing with water, it was immersed in 20 mass % nitric acid aqueous solution at 60 degreeC for 10 seconds, and it washed with water. The amount of etching on the grained surface is about 3g / m 2 .

[0302]

[0303] Next, electrochemical roughening treatment was continuously perfo...

Embodiment 2～12 and comparative example 1～4

[0369] An aluminum support for a lithographic printing plate and a lithographic printing plate precursor were produced in the same manner as in Example 1 except that the conditions of the second electrolytic treatment and subsequent etching treatment were changed to the conditions shown in Table 1 below.

Embodiment 13～19

[0371] As shown in the following Table 1, instead of the presence or absence of the primer layer or the compound (1) for the primer layer, a compound that does not have a repeating unit having a phosphate group in the structure of the compound (1) for the primer layer is used, Except for this, the aluminum support body for lithographic printing plates and the precursor of lithographic printing plates were produced by the method similar to Example 1.

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Abstract

The present invention addresses the problem of providing an aluminum support for lithographic printing plate and a lithographic printing plate original plate that make it possible to obtain an original plate for lithographic printing plate having excellent printing durability when used as a lithographic printing plate and exhibiting excellent on-press developability. The aluminum support for lithographic printing plate according to the present invention is an aluminum support for lithographic printing plate in which an average value of a surface area increase magnification DeltaSSEM (%) is 200% or more and an average value of a pit depth DeltahSEM (nm) is 400 nm or less.

Description

technical field [0001] The invention relates to an aluminum support body for a lithographic printing plate and an original plate of a lithographic printing plate. Background technique [0002] The lithographic printing method is a printing method that utilizes the fact that water and oil are substantially incompatible, and the printing plate of the lithographic printing plate used therein forms a region that receives water and repels oily ink (hereinafter, the region is referred to as "non-compatible"). Image portion”.) and a region that repels water and receives oily ink (hereinafter, this region is referred to as “image portion”.). [0003] The aluminum support for lithographic printing plates used in lithographic printing plates is used in such a way that its surface supports the non-image area, so it is required to have excellent hydrophilicity and water retention, and also excellent adhesion to the image recording layer provided thereon, etc. opposite functions. If th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N1/08B41N1/14B41N3/03G03F7/00G03F7/09
CPCG03F7/00G03F7/09B41N3/034B41C2210/04B41C2210/08B41N1/083B41N3/08G03F7/11G03F7/115G03F7/20G03F7/32
Inventor 方波见慈浩西野刚
Owner FUJIFILM CORP
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