Optical protective pigments for printed inks and polymer fibers with triple ultraviolet and infrared excitation

Abstract

Counterfeited goods and documents existed always in the history and they still exist. In spite of the all undertaken protection means against forgery, the well-equipped and highly skilled individuals are able to copy many important documents. There is also no doubt that many strategically important products are placed on the market, illegally. Therefore, every one who is dealing with this problem should not only be concerned with the prevention of the falsifying, illegal copying or all kinds of faking but also with the methods for proper identification. To protect documents or products against forgery, one has to introduce an additional function that will alloy identifying its originality, definitively.