1. A printing apparatus comprising: a processor; a media path operatively connected to said processor; a media storage unit at one end of said media path; a marking engine positioned along said media path to receive printing media from said media storage, said marking engine printing marks on said printing media to produce printed media; and an output unit at a second end of said media path, said output unit outputting said printed media, said processor controlling said marking engine to print a uniform region having a visually uniform color for an observer within all areas of said uniform region, said processor controlling said marking engine to print different gloss patterns within said uniform region, said different gloss patterns forming gloss marks, and said processor controlling said marking engine to print different infrared patterns within said uniform region to form infrared marks.