Zero alcohol type lithographic printing system

Abstract

The invention relates to a zero alcohol type lithographic printing system. The zero alcohol type lithographic printing system comprises the following parts of a plate cylinder (3), a printing ink applying system (1) and a plate wetting water applying system (2), wherein the cylindrical outer surface of the plate cylinder (3) is provided with a printing plate (4); the printing ink applying system (1) comprises a printing ink source (8) and a plurality of printing ink rollers, and is used for applying printing ink onto the printing plate; the plate wetting water applying system (2) comprises a plate wetting water source (7) and a plurality of plate wetting water rollers, and is used for applying plate wetting water onto the printing plate; the plurality of plate wetting water rollers include a dampening vibrator (6); and the structure of the dampening vibrator (6) as follows includes a metal roller and a ceramic layer covering the outer surface of the metal roller; the outer surface of the ceramic layer is provided with a net pattern; and the content of alcohol type substances or ether type substances in plate wetting water is zero.

Description

technical field [0001] The invention belongs to the technical field of offset printing machines. Background technique [0002] Traditional lithographic printing uses the principle that oil and water are immiscible. The places with patterns on the printing plate are water-repellent and ink-friendly, so as to realize the coating of ink on the printing plate; while the places without patterns on the printing plate are Coat a thin layer of dampening water film, which has the function of ink repelling and hydrophilic. Therefore, there will be no ink on the place covered by the dampening water film, and there will be no dampening water film on the place where there is ink. In order to make the dampening water film easier to form smoothly, it is necessary to reduce the surface tension of water. Therefore, in the prior art of lithographic printing, alcohol, isopropanol (IPA) or other alcohols and ethers substitutes must be added to the fountain solution to achieve the purpose of r...

AI Technical Summary

Problems solved by technology

[0004] 1. Isopropanol is rich in harmful substances. Because it is a volatile substance, whether it is discharged in the air or in nature, it has a bad impact on the environment, especially in a relatively closed printing workshop. Propanol vapor will seriously damage the operator's health;

[0005] 2. Alcohol and isopropanol are flammable and explosive products, because their flash point is too low, they are easy to burn and explode, and are very unsafe;

[0006] 3. Increase printing cost;

[0007] 4. It will cause more printing problems

[0009] In addition, alcohol or ether substitutes are more expensive. In addition to increasing the cost of printing plants, they still cannot solve the problems of ink erosion, environmental pollution, and health damage.

For example, alcohol or ether substitutes are more likely to corrode the ink, and in the printing production process, they bring more problems than alcohol printing, such as poor drying of the ink, lightening of the color, formation of ink mist, ink accumulation, and easy Problems such as reverse pull and hue are not easy to control

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