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How to ensure the glossiness of Cigarette package UV varnish?

Release Time : 2024-10-23
As a high value-added packaging product, the appearance quality of cigarette package is very important, and the glossiness of UV varnish directly affects the visual effect of cigarette package. Here are some ways to ensure the glossiness of Cigarette package UV varnish.

First, the selection of raw materials is the key. High-quality resin is the basis for ensuring glossiness. UV curing resins with high transparency and high gloss should be selected. These resins can form a smooth and flat surface after curing, and have a strong ability to reflect light, thus presenting a high gloss effect. At the same time, the selection of photoinitiators is also very important. Efficient photoinitiators can ensure that the curing reaction of the resin is quickly initiated under ultraviolet light, so that the varnish is fully cured and the glossiness is improved.

Secondly, the optimization of the formula is crucial. Reasonably adjust the proportion of each component in the varnish to achieve the best glossiness effect. For example, appropriately increasing the content of resin can improve the glossiness of the varnish, but also pay attention to avoid other performance problems caused by excessive resin content. In addition, adding an appropriate amount of leveling agent can improve the leveling of varnish on the surface of cigarette packs, reduce surface defects and improve gloss.

In the production process, strict control of process parameters is an important link to ensure gloss. The intensity and irradiation time of ultraviolet light directly affect the curing degree of varnish. If the intensity of ultraviolet light is insufficient or the irradiation time is too short, the varnish may not be completely cured, resulting in a decrease in gloss. Therefore, the intensity and irradiation time of ultraviolet light should be reasonably adjusted according to the characteristics of the varnish and the situation of the production equipment to ensure that the varnish is fully cured.

At the same time, the surface quality of the printing substrate will also affect the gloss of the varnish. Before printing, it should be ensured that the paper surface of the cigarette pack is flat, smooth, free of impurities and oil stains. If the surface of the paper is rough, it will affect the leveling of the varnish and reduce the gloss. The surface quality of the paper can be improved by pre-treating the paper, such as coating primer, so as to provide a good adhesion basis for the varnish and ensure gloss.

Finally, storage and transportation conditions should not be ignored. The varnish should be stored and transported in an environment of high temperature, high humidity or direct sunlight to avoid affecting the performance and gloss of the varnish. During use, it is important to keep the varnish clean and avoid mixing impurities that affect the glossiness.

In short, by selecting high-quality raw materials, optimizing the formula, strictly controlling process parameters, ensuring the quality of the printing substrate, and paying attention to storage and transportation conditions, the glossiness of the Cigarette package UV varnish can be effectively guaranteed and the appearance quality of the cigarette package can be improved.
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