Preparation method for aluminum plate base for direct plate making in inkjet printing

An inkjet printing, aluminum plate-based technology, applied in the field of printing plates, can solve the problems of large micropore pore size, decreased printing quality of printed matter, small porosity, etc., and achieves increased porosity, good ink absorption, and improved resolution. Effect

Active Publication Date: 2012-08-29
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing electrochemical treatment conditions make the micropore diameter on the obtained aluminum plate base larger, and the porosity of a certain area is small, so that the inkjet printing direct plate-making ink is easy to diffuse on this aluminum plate base, resulting in printed matter. Decreased print quality

Method used

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  • Preparation method for aluminum plate base for direct plate making in inkjet printing
  • Preparation method for aluminum plate base for direct plate making in inkjet printing
  • Preparation method for aluminum plate base for direct plate making in inkjet printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Wash the aluminum base used for printing plates with water, degrease in a 40°C degreasing solution (40 wt% sodium hydroxide aqueous solution), and then neutralize the degreasing solution remaining on the aluminum base with 2 wt% dilute hydrochloric acid solution, Wash in hot water at 50°C.

[0047] Put the above-mentioned degreased and cleaned aluminum substrate into the electrolytic solution for two electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolytic solution is 0.5wt%, the concentration of tartaric acid is 1wt%, and the concentration of aluminum nitrate is 0.01 wt%, the balance is water, the electrolysis time is 80s, and the temperature of the electrolyte solution is 40°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 0.5wt%, and the concentration of tartaric acid is 1wt %, the concentration of aluminum nitrate is 2wt%,...

Embodiment 2

[0049] Wash the aluminum base used for printing plates with water, degrease in a 40°C degreasing solution (40 wt% sodium hydroxide aqueous solution), and then neutralize the degreasing solution remaining on the aluminum base with 2 wt% dilute hydrochloric acid solution, Wash in hot water at 60°C.

[0050] Put the above-mentioned degreased and cleaned aluminum plate base in the electrolytic solution for two electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolytic solution is 8wt%, the concentration of phosphoric acid is 2wt%, and the concentration of acetic acid is 0.04wt%. , the concentration of ethylenediamine is 0.01wt%, the concentration of ethanolamine is 0.3wt%, the concentration of aluminum sulfate is 0.03wt%, the balance is water, the electrolysis time is 40s, and the temperature of electrolyte solution is 20 ℃; Carry out the second electrolysis in the electrolyte solution: the concentration of hydrochloric acid in the electrolyte...

Embodiment 3

[0052] Wash the aluminum base used for printing plates with water, degrease in a 40°C degreasing solution (40 wt% sodium hydroxide aqueous solution), and then neutralize the degreasing solution remaining on the aluminum base with 2 wt% dilute hydrochloric acid solution, Wash in hot water at 55°C.

[0053] Put the above-mentioned degreased and cleaned aluminum plate base in the electrolytic solution for two electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolytic solution is 3wt%, the concentration of phosphoric acid is 2wt%, and the concentration of aluminum nitrate is 1wt%. , the concentration of cycloethylamine is 1wt%, the balance is water, the electrolysis time is 60s, and the temperature of the electrolyte solution is 30°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 0.3wt %, the concentration of phosphoric acid is 0.2wt%, the...

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Abstract

The invention belongs to the field of printing plates and relates to a preparation method for an aluminum plate base for a printing plate and particularly relates to a preparation method for the aluminum plate base for direct plate making in inkjet printing, and the method can improve image-text resolution factor. In the invention, after an electrolyzing and anodizing treatment step and before a water washing step, the step of soaking the aluminum plate base by kalinous treatment fluid is added, so as to enable nanometer and micron coarse structures to be built on the surface of the aluminum plate base, and the high-resolution aluminum plate base for direct plate making in inkjet printing can be obtained. The nanometer and micron coarse structures can control infiltration and diffusion actions of an ink droplet on the surface of the aluminum plate base, and the obtained aluminum plate base has roughness and meanwhile has an absorbency and excellent wearing resistance. By using the direct plate making technology in inkjet printing, plate making ink is sprayed on the aluminum plate base prepared through the method provided by the invention to form an image-text region, and by adjusting the preparation technology of the aluminum plate base, the contrast between the image-text region and a non-image text region can be enhanced, and the resolving power of the obtained picture and text can be improved.

Description

technical field [0001] The invention belongs to the field of printing plates, and relates to a method for preparing an aluminum base for printing plates, and more particularly to a method for preparing an aluminum base for inkjet printing direct plate-making that can improve the resolution of images and texts. Background technique [0002] Inkjet computer to plate technology (Inkjet Computer To Plate) is a technology that uses inkjet printing equipment to directly spray images on the processed metal plate or polymer plate. The metal plate base of existing plate-making mainly uses aluminum plate. In order to improve the printing resistance and graphic resolution of the aluminum plate base, the aluminum plate base is usually subjected to graining treatment (see CN85100875), so that the surface of the aluminum plate base has a certain roughness. At present, the sand graining treatment method is mainly electrochemical treatment method. Electrochemical treatment includes electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N1/04B41N3/03B41C1/00B41J2/01
Inventor 周海华刘云霞宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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