Colorless fluorescent anti-counterfeiting fiber is also known as invisible anti-counterfeiting fiber, invisible anti-counterfeiting fiber, fluorescent anti-counterfeiting silk, invisible anti-counterfeiting fiber wool, anti-counterfeiting fluorescent fiber. The fiber is nearly white in natural light, and after mixed into pulp copying paper, the fiber is invisible in natural light, and when irradiated by UV lamp, the fiber distributed randomly in the paper is visible to emit fluorescence (red, blue, green, etc.), and the fiber can be picked out with a needle.
