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.

Infrared absorbing anti-counterfeiting ink is made by adding one or several near-infrared absorbing materials into the ink, and the near-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. Because the near-infrared absorption ink absorbs infrared light, if this ink is used in a certain part of the printed product, there is no Traces, but under the detection instrument, the corresponding signal or dark graphics can be observed.