UV printing ink printing art of forming texture

Abstract

The invention provides a veining UV ink printing technology which sequentially includes the main steps as follows: a. printing UV ink on a sheet printing stock by a silk screen of 150 to 250 mesh; b. UV radiating the sheet printing stock under low temperature for the first time; c. after 2 to 8 seconds of the first UV radiation, UV radiating the sheet printing stock under low temperature for the second time; d. after 1 to 5 seconds of the second UV radiation, UV radiating the sheet printing stock under high temperature, and radiating the sheet printing stock with an ultraviolet light with the power of ranging from 10000W to 16000W, with the transmitted speed of the printing sheet stock controlled within 20 to 30m / min, and completely solidifying the UV ink. The UV ink printing technology of the invention is distinct in visual effect, rich in level, and strong in stereoscopic veins. Besides, the invention can prevent the printing stock from deforming.

Description

technical field [0001] The invention belongs to a printing process, in particular to a process for printing UV ink on the surface of a substrate. Background technique [0002] UV ink is a light-curing ink, does not contain organic solvents, has little pollution, and is harmless to the human body. It fully embodies the advantages of energy saving, high efficiency, and environmental protection. It meets the requirements of green packaging and is the main trend of printing ink development in the world today; UV ink printing The effect is high-grade, so it is widely used in various high-end packaging materials such as cigarette packs, wine boxes, tea boxes, food boxes, medicine boxes, gift boxes, and cosmetic boxes. [0003] However, the existing UV inks generally use offset printing or gravure printing. The printing effect is relatively smooth and single, with poor three-dimensional effect and few layers. For this reason, people have been trying to improve the printing process ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing UV inks generally use offset printing or gravure printing. The printing effect is relatively smooth and single, with poor three-dimensional effect and few layers. For this reason, people have been trying to improve the printing process of UV inks in order to produce more and richer colors Printing effect, one of the most important exploration directions is to make UV ink produce texture effect

In the existing printing technology, the texture generation and ink curing of the surface of the UV ink layer are carried out almost simultaneously. In order to produce the UV ink texture with obvious visual effects, the prior art mainly uses high-power infrared lamps to process the UV ink layer for a long time. Bake and irradiate to deform the UV ink layer due to high temperature and heat, thus producing texture

However, the use of high-power infrared lamps to irradiate the UV ink layer for a long time has the following disadvantages: 1. The sheet substrate will be seriously deformed due to high temperature, which will affect the accuracy of subsequent processes (such as bronzing, die-cutting) and reduce the printing quality. , increasing the scrap rate; 2. The texture effect produced is not obvious, the decoration is not strong, and the sense of hierarchy is single; 3. The investment in equipment is large, and the energy consumption is large, which increases investment and operating costs

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