Fluorescent ink is one of the more commonly used inks in ticket printing, and its main component is fluorescent pigment. Fluorescent pigments are functional luminescent pigments. The difference from ordinary pigments is that when external light (including ultraviolet light) is irradiated, they can absorb a certain form of energy, and excited photons release the absorbed energy in the form of low visible light, resulting in a difference. Fluorescence of hue. Different colors of light combine to form unusually bright colors, and when the light stops irradiating, the luminescence phenomenon disappears, so it is called a fluorescent pigment. Fluorescent pigment is mixed with polymer resin binder, solvent and auxiliary agent, and fluorescent ink can be prepared by grinding. This ink, which is invisible to the naked eye, only emits light under ultraviolet or infrared light. It is precisely because of its switchable and hidden characteristics and the characteristics that it cannot be accurately reproduced on a color copier, making the ink in the special printing industry Application is more popular.
Special inks that emit ultraviolet light (200-400nm) and emit visible light (400-800nm) are called ultraviolet fluorescent inks. According to the different excitation wavelengths, it is divided into short wave and long wave. The excitation wavelength of 254nm is called short-wave ultraviolet fluorescent ink, and the excitation wavelength of 365nm is called long-wave ultraviolet fluorescent ink. According to the change of color, it is divided into colorless, colored, and discolored. Colorless can display red, yellow, green, Blue and other colors; tinted can make the original color shiny; color change can make one color into another color is feasible.