UV Flexo Printing Ink

Traditional flexographic printing inks rely on natural evaporation or heating to dry, which takes a long time, while UV Flexo printing inks are instantly cured by ultraviolet rays, and the drying time is as short as a few seconds to more than ten seconds, which greatly improves production efficiency and enables subsequent processing such as cutting and laminating immediately after printing, reducing the production cycle. The ink film formed after UV ink is cured has high hardness and strong wear resistance, which can effectively resist the friction and scratching of packaging during transportation and storage, ensuring that the printed graphics are clear and durable. Its color vividness and saturation are also better than traditional inks, with a wider color gamut, which can accurately restore the rich colors of the design draft. Traditional inks contain a large amount of volatile organic compounds (VOCs), which evaporate into the air during printing and drying, polluting the environment and endangering the health of operators. UV Flexo printing inks produce almost no VOCs during the curing process, and the volatility is extremely low. UV inks have good adhesion to a variety of substrates, including paper, cardboard, plastic films (such as polyethylene, polypropylene, polyester, etc.), metal foils, etc.

What factors should be considered when choosing UV Flexo printing inks?

When choosing ink, it is necessary to comprehensively consider factors such as the characteristics of the substrate, printing color requirements, curing equipment compatibility, and ink resistance. Different substrates have different surface energy, roughness, and chemical properties. For example, paper has strong water absorption, while plastic film has a smooth surface and is chemically inert. Therefore, it is necessary to select suitable inks to ensure good adhesion. Printing packaging that requires high color accuracy (such as food, medicine, and high-end cosmetics packaging) requires the use of inks with high color intensity and stable hue, while considering transparency and overprinting to ensure accurate multi-color overprinting. The wavelength and power of the curing equipment must match the photoinitiator in the ink to ensure that the ink can be fully cured to avoid affecting the printing quality. The resistance of the ink is also key. Its friction resistance, chemical resistance, light resistance and other properties need to be evaluated according to the packaging purpose.

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