thin magnetic film interference device or pigment and method of doing so, printing ink or coating composition, warranty and use of such thin magnetic film interference device

摘要

"Thin magnetic film interference device or pigment and method of doing so, printing ink or coating composition, warranty and use of such thin magnetic film interference device". The invention features a magnetic ovp, said pigment consisting of thin layer flakes having a basic metal-dielectric-metal structure to result in the appearance of a color that depends on the viewing angle, and having, in addition to the appearance of a color that depends on angle of view, magnetic properties incorporated to make them distinguishable from a similar looking ovp but without said magnetic properties. The invention also provides methods for obtaining such pigments and the use of such pigments as safety elements in paints, coatings and articles.