Water-based ink lithographic offset printing method

A technology of lithographic offset printing and water-based ink, which is applied in printing, printing process, printing plate, etc., can solve environmental hazards and other problems, achieve the effect of improving printing production efficiency, reducing operating technical threshold, and improving printing quality

Active Publication Date: 2021-08-27
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, because the color ink is oily, it is inevitable to use a strong solvent to clean the ink during use to produce waste ink cleaning solution. When the plate is developed, waste developer and waste fountain solution will be produced. cause harm

Method used

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  • Water-based ink lithographic offset printing method
  • Water-based ink lithographic offset printing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 The metal plate base is directly processed into a super-hydrophobic surface

[0039] (1) Choose a superhydrophobic metal plate base, which can be aluminum plate base, zinc plate base, magnesium plate base or other metal plate bases.

[0040] (2) The surface of the metal plate base can be treated with engraving, corrosion, laser, embossing and other processes to complete the strength support structure according to the needs, forming such as figure 2 Some patterns are shown.

[0041](3) The super-hydrophobicity treatment of the surface of the metal plate base can be treated by direct chemical corrosion, anodic oxidation, micro-arc oxidation, laser direct treatment and other methods. After the surface of the metal plate base is super-hydrophobic, the surface contact angle of the material must be greater than or equal to 130° before it can be used in subsequent processes. Metal substrates treated with surface superhydrophobic properties such as figure 1 As sho...

Embodiment 2

[0048] Example 2 A layer of superhydrophobic material is coated on the surface of the metal plate base

[0049] (1) Choose a superhydrophobic metal plate base, which can be aluminum plate base, zinc plate base, magnesium plate base or other metal plate bases.

[0050] (2) The surface of the metal plate base can be treated with engraving, corrosion, laser, embossing and other processes to complete the strength support structure according to the needs, forming such as figure 2 Some patterns are shown.

[0051] (3) Super-hydrophobic treatment of the surface of the metal plate base, direct coating, soaking and other treatments, coating a layer of super-hydrophobic material on the surface of the metal plate base. After the surface of the metal plate base is super-hydrophobic, the surface contact angle of the material must be greater than or equal to 130° before it can be used in subsequent processes.

[0052] (4) Prepare UV-dried water-based ink, which is mainly composed of wate...

Embodiment 3

[0058] Example 3 A layer of superhydrophobic material is coated on the surface of the non-metal base

[0059] (1) Choose a super-hydrophobic non-metal base, which can be nylon, polyester, engineering plastic or other non-metal bases.

[0060] (2) Super-hydrophobic treatment of the surface of the non-metal base, direct coating, soaking and other treatments, coating a layer of super-hydrophobic material on the surface of the non-metal base. After the surface of the non-metallic plate base is super-hydrophobic treated, the surface contact angle of the material must be greater than or equal to 130° before it can be used in subsequent processes.

[0061] (3) Prepare UV-dried water-based ink, which is mainly composed of water-based resin, photoinitiator, pigment and additives.

[0062] (4) Replace part of the ink rollers on the lithographic offset printing equipment with anilox rollers.

[0063] (5) Cooling devices are added to the ink transfer roller, ink string roller, form roll...

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PUM

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Abstract

A water-based ink lithographic offset printing method belongs to the technical field of printing. The method comprises the following steps of (1) preparing a super-hydrophobic plate, specifically, forming a super-hydrophobic layer on the surface of a plate; (2) printing down and making the super-hydrophobic plate, specifically, treating the surface super-hydrophobic layer to increase the surface energy of parts where images-texts are printed, and changing the state into a hydrophilic state from a super-hydrophobic state, so that a blank part is still kept in the super-hydrophobic state; and (3) using water-based ink for printing, specifically, adsorbing the water-based ink on the part, where the images-texts are printed, of the plate after plate making, enabling the water-based ink to not be adsorbed on the blank part, so that lithographic offset printing is completed. The water-based ink lithographic offset printing method basically solves the environment-friendly problem of a traditional offset printing process; the adjustment time of formal printing is shortened, and the printing efficiency is improved; drying can be achieved after printing is completed, and the production efficiency is remarkably improved; the printing quality is obviously improved, and meanwhile, the cost is not increased; and operators do not need to change operation habits, and popularization is convenient.

Description

technical field [0001] The invention belongs to the technical field of printing and relates to a method for lithographic offset printing using water-based ink. Background technique [0002] The current lithographic offset printing uses PS plates and oil-based inks. The traditional PS plate is divided into three layers: the bottom layer is a metal plate base, usually made of metal aluminum; the upper layer of metal aluminum is aluminum oxide (Al 2 o 3 ); the top layer is a pre-coated non-silver photosensitive resin (diazonium salt). At present, the plate-making process of oil-based ink lithographic offset printing is as follows: through a certain amount of ultraviolet light, the pre-coated photosensitive layer on the surface of the PS plate is partially exposed, and then after developing, cleaning, etc., the PS plate layout is left behind for future printed graphics. Pre-coat the photosensitive resin layer, and the part that will not be printed in the future exposes the ul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/06B41C1/10B41N1/08B41N1/14
CPCB41M1/06B41C1/10B41N1/08B41N1/14
Inventor 王卫民何雨阳
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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