Offset printing ink must have high viscosity (dynamic viscosity η = 40 ~ 100Pa · s). When offset printing ink spreads on the inking unit rollers or transfers to the substrate, such as printing plates and blankets, the drying components in the ink do not cause the ink to harden.

For the second week of November, colleagues in the Print Area are all gearing up for Saturday's sport -- the debate. This is our first debate competition.

Water-transparent ink is the water-based screen printing ink itself that is white, becomes transparent when exposed to water, and restores after drying.

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.

At present, there are two kinds of infrared excitation inks, infrared red and infrared green, and there are some infrared excitation inks of different colors, such as red, green, blue, purple, etc. Infrared excitation ink is an anti-counterfeiting ink developed by adding infrared light-emitting materials to corresponding linking materials through a special process. It is colorless in appearance and emits visible light after being excited by 980nm infrared light. .