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Method for mfg. support body for lithographic plate printing plate

A technology of lithographic printing plate and manufacturing method, which is applied in the preparation, printing, printing process and other directions of the printing surface, and can solve the problem that the monomer Si cannot be completely removed.

Inactive Publication Date: 2002-04-10
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although intermetallic compounds such as α-AlFeSi, which cause too cool ink pollution, can be removed relatively easily, monomer Si, which also causes too cool ink pollution, cannot be completely removed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0055] Embodiment 1-4, comparative example 1-3

[0056] The raw material aluminum alloy plates of the supports for lithographic printing plates of Examples 1-4 and Comparative Examples 1-3 were produced from aluminum alloy melts having alloy compositions shown in Table 1. The method of manufacturing the aluminum alloy plate is as follows: firstly, the aluminum alloy melt adjusted to the composition shown in Table 1 is subjected to melt treatment including degassing and filtering, and cast into an ingot with a thickness of 500 mm by DC casting. The surface of the ingot was plane-cut by 10 mm, and then the ingot was heated, and subjected to hot rolling treatment under the conditions shown in Table 2 until the thickness of the ingot reached 4 mm without soaking. The heating temperature is divided into two levels of 300°C and 400°C.

[0057] Element

Si

Fe

Cu

mn

Mg

Zn

Ti

content

0.08

0.30

0.017

0.005

0.005

0.003 ...

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PUM

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Abstract

The invention discloses a method of manufacturing the substrate for the lithographic plate comprises a casting process wherein an ingot is cast from a molten aluminum alloy (1), a rolling process wherein surface grinding, heating, hot rolling and cold rolling processings are applied to the ingot sequentially to prepare an aluminum alloy sheet of a thickness 0.1-0.5 mm (2), a planeness correcting process wherein a planeness correcting processing is applied to the aluminum alloy sheet (3) and a surface treating process wherein surface roughening and anodizing treatments are applied to the aluminum alloy sheet after the planeness correcting processing (4). The temperature of the heating processing in the rolling process is made 350 DEG C. or above, while the temperature after the hot rolling processing is made 200-350 DEG C. and further made 150 DEG C. or below within five hours after the hot rolling processing. According to the method of the invention, it can abbreviate the neccessary soaking treatment and annealing theatment processes used heretofore and to provide a manufacturing method of a substrate for a lithographic plate being excellent in the resistance to a severe ink stain, at a low cost and with little energy.

Description

technical field [0001] The present invention relates to a method for producing a support for a lithographic printing plate in which an aluminum alloy plate is subjected to at least surface roughening treatment and anodic oxidation treatment, and particularly relates to a method for producing a support for a lithographic printing plate having excellent resistance to hot ink staining. Background technique [0002] Conventionally, the manufacturing method of the support body for lithographic printing plates is to roughen the surface of one side or both sides of an aluminum alloy plate, and then perform anodic oxidation treatment to improve its wear resistance. A photosensitive layer was provided on this lithographic printing plate support to prepare a lithographic printing plate precursor. In addition, in order to shorten the vacuum deposition time during plate making, fine unevenness called a matte layer may be provided on the surface of the photosensitive layer. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/09B41N1/08B41N3/03C22F1/00C22F1/04C25D11/16G03F7/00
Inventor 泽田宏和上杉彰男
Owner FUJIFILM CORP