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. .