Preparation method for alcohol-free fountain solution

Abstract

The invention relates to a preparation method for an alcohol-free fountain solution, and belongs to the technical field of printing. The synergistic interaction effect of micelle forming capacity andsurface tension reduction capacity of an anionic surfactant, namely lauryl sodium sulfate and a zwitterionic surfactant, namely lauramidopropyl betaine is adopted for preparing the alcohol-free fountain solution, an anticreaming agent and an oil-water balance agent are added into a combinational surfactant, a betaine type amphoteric surfactant can be dissolved in an acid, neutral or alkaline aqueous solution, and the seepage force, the decontamination capacity, the antistatic performance and the like are better. The pH of a system of the adjusting fountain solution is 4.5-6, the disperse uniformity of the fountain solution can be improved, meanwhile, later-period mixing with printing ink is facilitated, and emulsification of the printing ink is reduced; and phosphoric acid enables acacia gum to dissolve to obtain more arabic acid to supplement for a hydrophilic glue film of an empty part of a plate face, a compact oleophobic and hydrophilic film can be formed on the surface of the fountain solution, and the adhesive force of the film and the printing plate is strengthened.

Description

technical field

[0001] The invention relates to a method for preparing an alcohol-free fountain solution, which belongs to the technical field of printing. Background technique

[0002] The offset printing process is mainly based on the principle of water-ink immiscibility, emulsification, wetting, and selective adsorption. The blank part is hydrophilic and ink-friendly, and the graphic part is lipophilic and water-repellent. plays a very important role. Therefore, the fountain solution should have five basic functions: First, during the printing process, the fountain solution will spread rapidly on the printing plate, forming a water film on the non-graphic part of the printing plate, and this water film can prevent the ink from flowing to the printing plate. The non-graphic part diffuses, and this layer of water film is thin and uniform. The second is that the fountain solution should maintain relative stability during printing, and the degree of emulsification of the in...

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