Producing printed area that is fluorescent under ultraviolet light by replacing primary colors with inks containing fluorescent pigments

摘要

A method for the production of printed surfaces which are fluorescent under UV light uses either a single or four colour print process in which the base colours of yellow, blue and red and special colour tones contain fluorescent pigments, which are not visible under normal light but visible under UV light, in a fixed ratio to the pigments which are colourfast under high intensity light. The inventive method can be carried out easily to apply and the numerous printing steps previously required are avoided. The greatest advantage is the fact that pictures printed with fluorescent colours appear to give a complete three-dimensional effect at night under UV light with an authentic stepless colour reproduction of all tones when compared to the daylight effect.