PROTECTIVE ELEMENT CONTAINING MAGNETIC FLUID MEDIUM

摘要

FIELD: physics.SUBSTANCE: protective element contains a plurality of particles consisting of a core and a cladding. The core of the particles contains a magnetic fluid medium and is visually distinct from the magnetic fluid medium of a nonmagnetic phase, configured to move inside the magnetic fluid medium.EFFECT: protective element with high degree of protection from forgery, whose outward appearance can be interactively affected during authentication to obtain a dynamic image.29 cl, 9 dwg