Safety feature for a valuable or security product and methods of making the security feature

The novel security feature 200 for a value or security product 100 is formed by at least one Lichtleitstruktur 220 which passes through a major surface 101, a front and a rear major surface 103 having product layer 105th The at least one Lichtleitstruktur 220 respectively has a facing surface for a light entrance 230 and an end surface of a light exit 210th All end surfaces 210, 230 are within range of one of the major surfaces 101, 103. The Lichtleitstruktur 220 is formed by a strand of material portion 250th