process for producing an optical effect layer on a substrate, optical effect layer, its use and security document

摘要

The invention concerns the field of security document protection, such as, for example, banknotes and identity documents against counterfeiting and illegal reproduction. In particular, the invention relates to a method for freezing the orientation of orientable magnetic or magnetizable pigment particles by irradiating hardening the coating layer comprising the magnetizable or magnetizable orientable pigment particles through the substrate leading to the coating layer.