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Method for manufacturing lithographic printing plate, developer for original lithographic printing plate, and replenisher for developing original lithographic printing plate

A technology of lithographic printing plate and developing solution, which is applied in the direction of photoplate making process, photography and equipment on patterned surface, which can solve the problems of large space of automatic developing machine, residual developing waste liquid, washing waste liquid environment and operating cost, etc. To achieve the effect of excellent developability

Active Publication Date: 2011-10-26
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, the conventional development treatment process includes developing in an alkaline aqueous solution with a pH of 11 or more, then rinsing the alkali agent through a water bath, and then treating it with a glue solution mainly composed of a hydrophilic resin. Therefore, the automatic developing machine itself will take up a lot of space, and then there will be problems in the treatment of developing waste liquid, washing waste liquid, glue waste liquid, etc., as well as environmental and operating costs.

Method used

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  • Method for manufacturing lithographic printing plate, developer for original lithographic printing plate, and replenisher for developing original lithographic printing plate
  • Method for manufacturing lithographic printing plate, developer for original lithographic printing plate, and replenisher for developing original lithographic printing plate
  • Method for manufacturing lithographic printing plate, developer for original lithographic printing plate, and replenisher for developing original lithographic printing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1～1-34

[0509] (Examples 1-1 to 1-34, Comparative Examples 1-1 to 1-6)

[0510]

[0511] The following surface treatments were performed using an aluminum plate (JIS A1050) with a thickness of 0.03 mm.

[0512] (a) Mechanical roughening

[0513] While supplying a suspension of an abrasive (pumice) having a specific gravity of 1.12 and water as an abrasive slurry onto the surface of the aluminum plate, mechanical surface roughening was performed with a rotating roller-shaped nylon brush. The abrasive has an average particle size of 30 μm and a maximum particle size of 100 μm. The material of the nylon brush is 6.10 nylon, the hair length is 45 mm, and the diameter of the hair is 0.3 mm. A hole was drilled in a φ300mm stainless steel cylinder, and a nylon brush was tightly inserted into it. Use three rotating brushes. The distance between the two supporting rollers (φ200mm) at the bottom of the brush is 300mm. The load of the drive motor that presses the brush roll until the brus...

Embodiment 1-35～1-60

[0713] (Examples 1-35 to 1-60, Comparative Examples 1-7 to 1-10)

[0714]

[0715] The support body 2 was produced by the same method as Example 1-1.

[0716]

[0717] Coating solutions 8 to 10 for the photosensitive layer described below were prepared and coated on the support body 2 formed as described above using a wire-wound blade coater. Drying was performed at 100° C. for 60 seconds using a warm-air drying apparatus. The coating weight after drying is 1.4g / m 2 . Then, the same protective layer coating liquid 1 as the lithographic printing plate precursor 1 was coated using a bar so that the dry coating amount was 1.25 g / m 2 , and then dried at 125° C. for 70 seconds to form a protective layer to make a lithographic printing plate precursor 8-10.

[0718] [Photosensitive layer coating solution 8]

[0719] · Binder polymer (B-4): 0.25 parts by weight

[0720] · Binder polymer (B-3): 0.20 parts by weight

[0721] · Binder polymer (B-6): 0.15 parts by weight

[0...

Embodiment 1-61、 comparative example 1-11

[0772]

[0773] An aluminum plate (material 1050, tempered H16) with a thickness of 0.24 mm was immersed in a 5% sodium hydroxide aqueous solution maintained at 65° C., degreased for 1 minute, and then washed with water. This degreased aluminum plate was immersed in a 10% hydrochloric acid aqueous solution maintained at 25° C. for 1 minute to neutralize it, and then washed with water. Next, the aluminum plate was immersed in a 0.3% by weight aqueous hydrochloric acid solution at 25° C. at a current density of 100 A / dm. 2 Under the condition of , the electrolytic roughening was carried out by alternating current for 60 seconds, and then the decontamination treatment was carried out in 5% sodium hydroxide aqueous solution kept at 60°C for 10 seconds. Put the decontamination-treated roughened aluminum plate in a 15% aqueous solution of sulfuric acid at 25°C with a current density of 10A / dm 2 1. Under the condition of a voltage of 15 V, an anodic oxidation treatment was perform...

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Abstract

Provided are a method for manufacturing a lithographic printing plate, a developer for the original lithographic printing plate, and a replenisher for developing the original lithographic printing plate, whereby a lithographic printing plate with excellent developability and good printing performance, including printing durability and stain resistance, can be manufactured, and the occurrence of development residue attributable to ethylenic unsaturated compounds can be prevented while achieving excellent processing capability. The method for manufacturing a lithographic printing plate has a step (A) in which a lithographic printing plate having a photosensitive layer containing (i) a binder polymer, (ii) an ethylenic unsaturated compound, and (iii) a radical polymerization initiator is produced on a substrate, an exposure step (B) in which the aforementioned lithographic printing plate is exposed to light, and a development step (C) in which the photosensitive layer in unexposed portions of the aforementioned lithographic printing plate is removed. The aforementioned development step (C) is carried out using a developer containing an enzyme.

Description

technical field [0001] The invention relates to a plate-making method of a lithographic printing plate, a developing solution for the original plate of the lithographic printing plate and a replenishing liquid for developing the original plate of the lithographic printing plate. Background technique [0002] A lithographic printing plate generally includes an oleophilic image portion that receives ink during printing, and a hydrophilic non-image portion that receives dampening water. Lithographic printing is: using the property that water and printing ink repel each other, the oleophilic image part of the lithographic printing plate is used as the ink receiving part, and the hydrophilic non-image part is used as the wet water receiving part (ink non-receiving part). ), a method in which a difference in ink adhesion is produced on the surface of a lithographic printing plate, ink is applied only to an image portion, and then the ink is transferred to a substrate such as paper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/32G03F7/00G03F7/027G03F7/032
CPCG03F7/027G03F7/32G03F7/322
Inventor 田口贵规吉田进
Owner FUJIFILM CORP
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