IDENTITY CARD WITH MARKS WHICH CAN BE VERIFIED BY INCIDENT OR TRANSMITTED LIGHT, AND METHOD OF MANUFACTURING THE SAME

摘要

The multilayer identification card comprises several synthetic layers compounded by the effects of heat and pressure. An inside interface of at least one of these layers exhibits depressions which are filled with the material of the adjacent layer during the laminating process. The adjacent layers are selected in such a way that they are of different transparency. Thus a light and shadow effect is produced in incident light which is reversed in transmitted light.