A thermal transfer printing process for making identification cards is provided. The process involves printing indicia onto a dye-receptive surface of a card substrate. A metallic dye is applied in precise registration with selected print indicia to form a metallic border along the edges of the indicia....http://www.google.com/patents/US6734887?utm_source=gb-gplus-sharePatent US6734887 - Process for printing a metallic security feature on identification cards and cards produced therefrom
