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Lithographic original plate and printing method thereof

A technology for lithographic printing plates and original plates, applied in the field of lithographic printing plate original plates and their printing, can solve problems such as failure to achieve environmental protection, and achieve the effects of good on-machine developability, improved printing durability, and improved production efficiency.

Active Publication Date: 2016-09-14
LUCKY HUAGUANG GRAPHICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has some disadvantages, that is, its "pretreatment liquid" is not pure water, but some chemicals such as wetting agents, penetrants or gum arabic are added to the water, so it fails to achieve the true meaning of water. environmental protection

Method used

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  • Lithographic original plate and printing method thereof
  • Lithographic original plate and printing method thereof
  • Lithographic original plate and printing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of plate base: A1050 rolled aluminum plate with a purity of 99.5% and a thickness of 0.3 mm was etched in a 5% aqueous solution of sodium hydroxide at 70°C for 20 seconds, rinsed with running water, and immediately neutralized with a 1% aqueous solution of nitric acid; Then in 1% hydrochloric acid aqueous solution, at 40°C, use sine wave alternating current at 50A / dm 2 Electrolytic coarsening at the current density for 16 seconds; then neutralize with 5% sodium hydroxide aqueous solution for 10 seconds at 40°C, and wash with water; finally, at 30°C, use 20% sulfuric acid aqueous solution at 15A / dm 2 current density, anodize for 20 seconds, wash with water; use 5% sodium silicate aqueous solution for 18 seconds at 80°C for sealing treatment, wash with water, and dry; Weight 3.0g / dm 2 .

[0038] Photosensitive layer coating: Extrude and coat the following photosensitive liquid on the above-mentioned hydrophilized plate base, and then dry at 100°C for 60 seco...

Embodiment ２

[0053] Prepare the base and photosensitive layer in the same way as above. Photosensitive liquid with the following components:

[0054] Polymer with structure A2 2.932

[0055] Hydroxypropyl cellulose 0.180

[0056] Polyurethane Acrylic Prepolymer 0.72

[0057] Pentaerythritol triacrylate 0.684

[0058] Hexaarylbiimidazole 0.180

[0059] Sulfonium hexafluorophosphate 0.72

[0060] Infrared absorbing dye D1 0.036

[0061] Leuco Crystal Violet 0.180

[0062] BYK-333 0.004

[0063] 1-methoxy-2-propanol 34.36

[0064] The plate material obtained in this way is used to measure the water drop contact angle by the method described above, and it is 110mJ / cm2 on the Kodak Quansheng thermosensitive CTP plate-making machine. 2 The energy is exposed; then, the plate is loaded onto the printing press for printing, and its properties are listed in Table 1 below.

Embodiment 3

[0066] Prepare the base and photosensitive layer in the same way as above. Photosensitive liquid with the following components:

[0067] Polymer with structure A3 2.932

[0068] Hydroxypropyl cellulose 0.180

[0069] Polyurethane Acrylic Prepolymer 0.72

[0070] Pentaerythritol triacrylate 0.684

[0071] Hexaarylbiimidazole 0.180

[0072] Sulfonium hexafluorophosphate 0.72

[0073] Infrared absorbing dye D1 0.036

[0074] Leuco Crystal Violet 0.180

[0075] BYK-333 0.004

[0076] 1-methoxy-2-propanol 34.36

[0077] The plate material obtained in this way is used to measure the contact angle of water droplets by the method described above, and the contact angle is measured at 100mJ / cm2 on the Kodak Quansheng thermosensitive CTP plate-making machine. 2 The energy is exposed; then, the plate is loaded onto the printing press for printing, and its properties are listed in Table 1 below.

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Abstract

The invention relates to an original edition of a lithograph plate, and the original edition comprises an image recording layer and a substrate, wherein the image recording layer includes an infrared absorber, an energy initiation cross-linking and / or polymerization initiator and a cross-linkable and / or polymerization multi-polymer, the image recording layer is the single-layer hydrophilic and oleophylic mixture, and the contact angle of the mixture with the water drop in air is less than or equal to 10 degrees. Through the original edition of the lithograph plate, the intensity and anti-chemical property of the image part can be greatly improved, thereby improving durability and achieving the excellent developing effect and durability.

Description

technical field [0001] The invention belongs to the technical field of printing supplies, and in particular relates to a lithographic original plate and a printing method thereof. Background technique [0002] The preparation of lithographic printing plates is well known in the printing industry. The plate-making process of the lithographic plate requires at least two steps to complete. One is to expose the plate coated with the photosensitive composition to a specific light source through a mask (such as a positive film type and a negative film type mask), thereby forming One is the latent image of the light image; the other is to carry out a so-called subsequent development step on the printing plate after the above exposure, through which the excess coating is removed. Pre-coated photosensitive lithography is a sheet-like material supported by aluminum or polyester, and can be made through the above two steps to have both lipophilic and hydrophilic surfaces, suitable for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41N1/14G03F7/20
Inventor 杨青海李合成张涛张刚刘松玲吴兆阳宋小伟吴俊君黄文明刘红来
Owner LUCKY HUAGUANG GRAPHICS
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