Optical variable ink is a typical anti-counterfeiting ink in the field of packaging printing. In recent years, it has become a common practice to apply anti-counterfeiting technology to packaging in order to protect consumers' rights and ensure the reputation of enterprises. Here we will introduce the application of optical variable ink in packaging printing.

Due to its complex manufacturing process, difficult formulation technology, and high difficulty of imitation, optical variable ink occupies an important position in the field of anti-counterfeiting. Its manufacturing process first selects materials with different refractive indices to make optical variable thin film fragments, and then uses a series of physical and chemical methods to make different optical variable inks suitable for offset printing, letterpress printing, gravure printing, and screen printing. After being printed on the item packaging, the fragments in the optical variable ink can still maintain their original dynamic color-changing effect, pearl luster, metallic luster effect, and other characteristics. It is precisely because of this special point that it has anti-counterfeiting characteristics that other inks do not have. At the same time, optical variable ink is non-toxic and harmless after printing, and does not pollute the environment, so it is widely used in packaging fields such as cigarettes, alcohol, and cosmetics.