Flexographic printing is a type of letterpress printing that uses a flexographic printing plate and transfers ink through an anilox roller.

Infrared-absorbing anti-counterfeiting ink is made by adding one or several near-infrared absorbing materials into the ink. The infrared absorbing material is an organic functional dye. It has absorption in the near-infrared region, the maximum absorption wavelength is 700nm~1100nm, and the oscillation wavelength falls in the near-infrared region. Since the near-infrared absorbing ink absorbs infrared rays, if this ink is used in a certain part of the printed matter, there will be no damage in sunlight. Traces, but under the detection instrument, corresponding signals or dark pictures and texts can be observed.

Flexographic UV inks are mainly composed of prepolymers, reactive diluents, photoinitiators and sensitizers, pigments, and additives. According to the requirements of different printing materials, these components are reasonably coordinated to make the flexo UV ink achieve the best performance.

At present, UV ink is widely respected by printing manufacturers. And UV ink is an economical and environmentally friendly ink, which is the direction of ink development in the future. The types and characteristics of UV inks are introduced below.

Water-based ink is referred to as water-based ink for short. The main difference between water-based ink and oil-based ink is the difference in solvent. Water-based ink uses water (45%-50%) as a solvent, and the VOC content is extremely low, which has little environmental pollution: oil-based ink uses organic solvents (toluene, di toluene, denatured alcohol, etc.) as the solvent. In the flexible packaging industry, since solvent-based inks are mainly volatile and dry, the lower the boiling point of the solvent, the easier it is to volatilize and release bad gas to pollute the environment. After the printing is completed, there are also bad residues on the surface. Substances, while the solvents used in water-based inks are water and ethanol excluded from the voc list, which can excellently reduce voc emissions.