PRINTING INKS; SECURITY PRINTING INKS; PRINTING INK PASTES; PRINTING INKS AND PRINTING INK PASTES FOR GRAPHIC PRINTING BY FLEXOGRAPHY, PHOTOGRAVURE, OFFSET, SERIGRAPHY, TYPOGRAPHY, INTAGLIO AND TRANSFER VARNISHES; LACQUERS IN THE NATURE OF A COATING; DYESTUFFS FOR USE IN THE MANUFACTURE OF INKS AND PIGMENTS; PRINTING INKS AND COATINGS, NAMELY SECURITY FEATURES FOR DETECTION BY PRODUCT AND CURRENCY AUTHENTICATION APPARATUS AND EQUIPMENT; AND TAGGANTS, NAMELY OVERT AND COVERT TAGGANT COATINGS O...