Manufacture of security tapes and security threads

摘要

A method of manufacturing a laminate structure for use in a security thread or tape comprises: i) providing a first structure (1) having a flexible carrier (2) supporting an optically variable effect structure (4-6); ii) adhering the first structure (1) to a flexible substrate (9) with the optically variable effect structure (4-6) between the carrier and the substrate; iii) removing the carrier (2); iv) permanently bonding the carrier (2) to the resulting laminate to generate a final laminate structure; and, v) slitting the laminate structure from step iv) into at least two lengths.