Method for repairing fading, dusting and scratches on surface of printed matter

Abstract

The invention provides a method and a process for timely repairing printed matter fading and dusting defects caused by chemical factors, and relates to the technical field of printing. The method comprises the steps of defective printed matter pretreatment, surface treating agent preparation, surface treating agent application and the like. According to the method, surface repairing of defective products can be achieved through existing surface coating equipment, extra equipment investment is not needed, a good repairing effect is achieved on defects such as printed matter decoloration and powder falling caused by chemical and environmental factors, the rejection rate of defective printed matters can be effectively reduced, and economic losses of printing enterprises are reduced; the surface treating agent is high in adhesion fastness, high in glossiness and good in flexibility, on one hand, the usage amount can be properly reduced, and on the other hand, the curing speed and adhesiveforce of the surface treating agent on the surface of printed matter are increased.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a method for repairing decolorization, powder removal and scratches on the surface of a printed matter. Background technique [0002] As the saying goes, the quality of printed matter is "one-third in printing, seven in plate-making". Gravure printing, as a kind of printing process, is characterized by its thick ink layer, bright colors, high saturation, high printing plate durability, and printed products. The advantages of stable quality and fast printing speed occupy an extremely important position in the field of printing and packaging and graphic publishing; from the perspective of application, gravure printing is mainly used for fine publications such as magazines and product catalogues, packaging printing and banknotes, stamps, etc. Printing of securities, but also used in special fields such as decorative materials. [0003] In the process of gravure printing, we often ...

AI Technical Summary

Problems solved by technology

[0005] But the second type involves more reasons, which are more caused by chemical factors.

Due to the improper control of ink viscosity during the printing process, the abrasion resistance of the packaging is reduced or the drying is not complete. At the same time, the improper control of some external environmental factors also leads to the decrease of the ink adhesion on the surface of the printed matter.

The consequences caused by these factors will not appear in time during the production process. The exposure of defects has the characteristics of delay, so it cannot be adjusted in time during the production process. cause large economic losses

For example, in 2013, the cigarette cartons provided by a well-known packaging material company to cigarette companies suffered severe powder loss during the cigarette packaging process, resulting in shutdowns, and the value of this batch of cigarette cartons was more than RMB 2 million. It caused serious economic losses to the packaging material company, and it sought to make up for the losses through a variety of repair methods within the specified time, but failed to achieve good results