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Developer for positive thermosensitive CTP (Computer to Plate)

A developer and heat-sensitive technology, which is applied in the field of computer-to-plate developer preparation, can solve problems such as reduction, developer instability, and reduced development efficiency, and achieve fast development speed, good dot reduction, and excellent fatigue resistance Effect

Inactive Publication Date: 2011-05-11
TAIXING CITY ORIENT IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the absorption of CO from the ambient air 2 , this type of developer is relatively unstable; in ordinary developing devices, such as immersion developing devices, due to CO 2 Causes a decrease in pH and a decrease in developing efficiency is observed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare positive thermal CTP plate developer according to the following weight ratio:

[0023] 1.75 parts tap water;

[0024] 2.14 parts of potassium metasilicate, modulus 2.0, pH value 13;

[0025] 3.1 part of sodium butylnaphthalene sulfonate, 1 part of polyoxyethylene amine, and 1 part of nonionic fluorocarbon surfactant;

[0026] 4.1 part of Swire oil, 1 part of OP-10, 1 part of AEP, 1 part of OEP-70, 1 part of JFC;

[0027] 5.1 parts sodium gluconate.

Embodiment 2

[0029] Prepare positive thermal CTP plate developer according to the following weight ratio:

[0030] 1.78 parts of tap water;

[0031] 2.12 parts of potassium metasilicate, modulus 1.8, pH value 14;

[0032] 3.1 part of sodium isopropyl naphthalene sulfonate, 1 part of sodium dodecylbenzene sulfonate, and 1 part of ethylene oxide adduct of polypropylene glycol;

[0033] 4.1 parts Taikoo oil;

[0034] 5.2 parts of disodium edetate, 2 parts of propylene glycol.

Embodiment 3

[0036] Prepare positive thermal CTP plate developer according to the following weight ratio:

[0037] 1.80 parts deionized water;

[0038] 2.14 parts of sodium metasilicate, modulus 1.0, pH value 13.5;

[0039] 3.2 parts of pulling powder;

[0040] 4.2 copies of OP-10;

[0041] 5.3 parts of glycerin, 1 part of silicone defoamer.

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Abstract

The invention discloses a developer for positive thermosensitive CTP (Computer to Plate), belonging to the technical field of preparation of developers for CTP. The developer comprises the following compositions in parts by weight: 75-85 parts of water, 10-15 parts of alkali metal metasilicate, 1-5 parts of surfactant, 1-5 parts of alkali resistant penetrating agent and 3-5 parts of auxiliary additive. The developer has the characteristics of high developing speed, good screen dot reduction, no damage to an aluminum substrate, difficulty in scaling, environmental protection, fatigue resistance, excellent developing latitude and the like.

Description

technical field [0001] The invention belongs to the technical field of developer preparation for computer-to-plate making, and in particular relates to a developer used for positive-working heat-sensitive CTP plates. Background technique [0002] Computer-to-plate technology (CTP technology) is a technology that uses highly directional light such as lasers to scan according to digital image information, thereby directly manufacturing printing plates without using lithographic printing films. CTP (computer to plate) plates are generally divided into three types: silver salt type, photopolymerization type, and thermal imaging type (heat sensitive). Positive thermal CTP plates are composed of a heat-sensitive layer and a support body. The support body is an aluminum plate. The heat-sensitive layer contains film-forming resin, solvent resistance, infrared dye, background dye, acid-generating source and additives; the support body is made of processed Electrolyzed, washed, and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/32
Inventor 沙栩正邹应全
Owner TAIXING CITY ORIENT IND
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