METHOD FOR PREPARING PLATE MATERIAL FOR PRINTING, METHOD FOR REGENERATING IT AND PRINTING MACHINE

Title:

METHOD FOR PREPARING PLATE MATERIAL FOR PRINTING, METHOD FOR REGENERATING IT AND PRINTING MACHINE

Document Type and Number:

Japanese Patent JP3422754

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a method for preparing a plate material for printing, a method for regenerating it and a printing machine in which the plate can be directly prepared from digital data and an enough quality of an image for practical use can be prepared without requiring a developing process and a developing liquid and it is possible to regenerate the plate material and to repeatedly use it.
SOLUTION: A hydrophobic printing area 4 is formed of an organic compound which is decomposed and removed by irradiating at least a part of a coating layer 3 of the plate material P for printing having a hydrophilic coating layer 3 containing the titanium oxide photocatalyst with a light having a higher energy than the band gap energy of a titanium oxide photocatalyst. The printing area 4 is returned thereby from hydrophobiacity to hydrophilicity by irradiating it with the light having a higher energy than the band gap energy of the titanium oxide photocatalyst and the coating layer 3 is easily regenerated.

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Inventors:

Yasuharu Suda
Hitoshi Shimada
Hitoshi Isono

Application Number:

JP2000163243A

Publication Date:

June 30, 2003

Filing Date:

May 31, 2000

Export Citation:

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Assignee:

MITSUBISHI HEAVY INDUSTRIES,LTD.

International Classes:

B41F7/02; B41C1/10; B41J2/01; B41N1/14; (IPC1-7): B41N1/14; B41C1/10; B41F7/02

Domestic Patent References:

JP11258860A
JP200062335A
JP11344804A
JP2000181068A

Attorney, Agent or Firm:

Koharu Fujita (3 outside)

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