MAGNETIC ASSEMBLIES AND METHODS FOR PRODUCING OPTICALLY EFFECTIVE COATINGS COMPRISING MAGNETIC OR MAGNETIZABLE PIGMENT PARTICLES ORIENTED IN THE SHAPE OF PLATES

Abstract

The invention relates to the field of protecting security documents, for example banknotes and identity cards, against counterfeiting and illegal reproduction. In particular, the present invention relates to magnetic assemblies and methods for producing optically effective coatings (OELs) on a substrate, said method comprising a step of exposing a coating composition comprising lamellar magnetic or magnetizable pigment particles to the magnetic field of the magnetic assembly so as to orient at least a portion of the lamellar magnetic or magnetizable pigment particles biaxially.