Patent ID: 9724956
Date: 2017-08-08
CPC Classifications: B05D,B41M,B42D,B44F,G07D,H01F

Claim:
1. An optical effect layer (OEL) comprising: a plurality of non-spherical magnetic or magnetizable particles, which are dispersed in a coating composition comprising a binder material, wherein in at least a loop-shaped area of the OEL at least a part of the plurality of non-spherical magnetic or magnetizable particles are oriented such that their longest axis is substantially parallel to the plane of the OEL, and wherein, in a cross-section perpendicular to the OEL and extending from the center of the central area, the longest axis of the oriented particles present in the loop-shaped area follow a tangent of either a negatively curved or a positively curved part of a hypothetical ellipse or circle; and wherein the central area surrounded by the loop-shaped area comprises a plurality of non-spherical magnetic or magnetizable particles, wherein a part of the plurality of non-spherical magnetic or magnetizable particles within the central area are oriented such that their longest axis is substantially parallel to the plane of the OEL, forming the optical effect of a protrusion within the central area of the loop-shaped area.