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Lithographic printing plate material, lithographic printing plate, method for preparing lithographic printing plate, and method for printing by lithographic printing plate

A lithographic printing plate and printing ink technology, applied in lithographic printing equipment, printing, printing technology, etc., can solve the problems of unsatisfactory dot quality and image quality of printed matter, difficulty in removing non-image parts, poor stain removal performance, etc. , to achieve the effect of excellent dot quality and excellent ink stain removal performance

Inactive Publication Date: 2008-12-03
KONICA MINOLTA MEDICAL & GRAPHICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem has not yet been solved. Once the stain is adhered to the non-image portion of the lithographic printing plate, it is difficult to remove the non-image portion even with a dampening solution, that is, the stain removal performance is poor.
In addition, since adhesion of dust etc. is likely to occur, the dot quality and image quality of the printed matter are not satisfactory, and printing failure occurs

Method used

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  • Lithographic printing plate material, lithographic printing plate, method for preparing lithographic printing plate, and method for printing by lithographic printing plate
  • Lithographic printing plate material, lithographic printing plate, method for preparing lithographic printing plate, and method for printing by lithographic printing plate
  • Lithographic printing plate material, lithographic printing plate, method for preparing lithographic printing plate, and method for printing by lithographic printing plate

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Experimental program
Comparison scheme
Effect test

Embodiment

[0253] The present invention will be described in more detail below with examples, but the present invention is not limited thereto. In the examples, "parts" means parts by mass unless otherwise specified.

[0254] Example

[0255] [Preparation of printing ink]

[0256] (preparation of varnish)

[0257] The following varnish compositions 1 and 2 were placed in four-neck flasks equipped with a condenser, a thermometer and a stirrer, heated to 200°C respectively, and stirred at 200°C for 1 hour to heat and dissolve to obtain a solution. Thereafter, 1 part of tolylene diisocyanate (TDI) was added to the solution, and further heated and stirred at 90° C. for 3 hours under a nitrogen atmosphere. Thus, Varnish 1 and Varnish 2 of printing inks for lithographic printing were prepared.

[0258] (Composition of Varnish 1)

[0259] Rosin modified phenolic resin 400 parts

[0260] (Mw: 100,000, acid value: 15, manufactured by HITACHI KASEI POLYMER CO., LTD)

[0261] Mineral oil 59 ...

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PUM

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Abstract

This invention provides a lithographic printing plate material that is excellent in contamination recovery and halftone dot quality and is less likely to cause printing troubles by dust adherence or the like. The lithographic printing plate material comprises an aluminum base material and an image forming function layer provided on the aluminum base material, the image forming function layer containing a photo-thermal conversion material, a photopolymerizable compound, and a polymerization initiator. The lithographic printing plate material is characterized in that the image forming function layer in its non-image part can be removed by, after image-wise exposure, supplying a printing ink containing at least one material selected from polymerizable monomers and polymerizable oligomers. There are also provided a lithographic printing plate, a method for preparing the lithographic printing plate, and a method for printing by a lithographic printing plate.

Description

technical field [0001] The present invention relates to a lithographic printing plate material, a lithographic printing plate, a method for preparing a lithographic printing plate, and a printing method using a lithographic printing plate. Background technique [0002] Digitization of printing data requires an inexpensive printing plate material for the CTP (Computer-to-Plate) system that is easy to use and has a print throughput comparable to PS plates. [0003] In recent years, from the viewpoint of environmental protection, a so-called processless CTP printing plate material that does not require developer treatment using a specific chemical reagent has been demanded. Thus, a printing method has been disclosed in recent years (see, for example, Patent Document 1), which comprises the steps of: after forming an image on a printing press, without any specific treatment agent treatment, mounting a printing plate material, and supplying the printing plate material with Wetti...

Claims

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Application Information

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IPC IPC(8): B41N1/14B41C1/10C09D11/02G03F7/00G03F7/004
CPCB41C1/1008B41C2210/22B41C2201/14B41C2201/12B41C1/1016C09D11/101B41C2210/24B41C2210/04B41C2201/10B41C2210/08B41C2201/02
Inventor 三瓶武司
Owner KONICA MINOLTA MEDICAL & GRAPHICS INC
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