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Lithographic printing method and presensitized plate

A pre-sensitized plate and compound technology, used in printing, plate preparation, photoplate making process of pattern surface, etc., can solve the problems of printing life and polymerization efficiency that are not suitable for practical application and have not been commercialized.

Active Publication Date: 2005-03-23
FUJIFILM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a plate has not been commercialized so far because the printing life and polymerization efficiency (sensitivity) are not suitable for practical use

Method used

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  • Lithographic printing method and presensitized plate
  • Lithographic printing method and presensitized plate
  • Lithographic printing method and presensitized plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0424] An image-recording layer-forming coating liquid A having the composition described below was prepared below. Coat the newly prepared coating solution on the previously obtained support with a wire-wound bar, and then dry it at 115° C. for 45 seconds with a hot air dryer to form an image recording layer and complete the negative presensitization Production of version P-1. Coating amount after drying is 1.0g / m 2 . Composition of coating solution A for forming image-recording layer:

[0425] Infrared absorber (IR-2 in the first aspect) 0.05g

[0426] Free radical generator (formerly OS-7) 0.2g

[0427] Monomer compound of formula 1.3g

[0428]

[0429] Poly(allyl methacrylate) (weight average molecular weight is 120000) 0.5g

[0430] Victoria Pure Blue, Naphthalene Sulfonate 0.02g

[0431] Fluorosurfactant of the following formula 0.1g

[0432]

[0433] Methyl ethyl ketone 18.0g

Embodiment 1-2 to 1-7

[0435] Except changing the kind of infrared absorber and free radical generating agent used in each embodiment as shown in Table 1, obtain the negative presensitization plate P-2 to P-7 with the method identical with embodiment 1-1.

Embodiment 1-8

[0437] Except that the copolymer of allyl methacrylate and sodium methacrylate (80:20 in molar ratio) was used instead of poly(allyl methacrylate), the same method as in Example 1-1 was used to obtain a negative-tone prepreg. Sensitized version P-8.

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Abstract

Disclosed is a presensitized plate composed of a support having thereon an image recording layer which includes: an infrared absorber (A) that is a cyanine dye having at least one fused ring composed of a nitrogen-containing heterocycle in combination with an aromatic ring or a second heterocycle, and having on the aromatic ring or second heterocycle an electron-withdrawing group or a heavy atom-containing group, a radical generator (B), and a radical-polymerizable compound (C), and which is removable with printing ink and / or dampening water. The presensitized of the present invention can be imaged with an infrared light-emitting laser to directly record an image from digital data on a computer or the like and is then subjected to on-machine development without carrying out a development step, which is capable of providing a large number of good impressions with a practical amount of energy.

Description

technical field [0001] The present invention relates to a presensitized plate for lithographic printing and a lithographic printing method using the presensitized plate. More specifically, the present invention relates to a presensitized plate which can be directly made into a lithographic printing plate by exposure to an infrared laser scanned thereon based on a digital signal from a computer or the like, and to a Lithographic printing, wherein the above-mentioned pre-sensitized plate is directly developed and printed on a printing press without a development step. Background technique [0002] Lithographic printing plates generally consist of oleophilic image areas that receive ink in a printing job and hydrophilic non-image areas that receive humidified water. Lithography is a method that utilizes the mutual repulsion between water and oily inks by having an oleophilic image area of ​​the plate as an ink-receiving area and a hydrophilic non-image area as a water-receivin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41C1/055G03F7/00
Inventor 光本知由中村一平
Owner FUJIFILM CORP
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