SECURITY THREAD OR TRANSFER FILM FOR HOT PROCESS MARKING OF BANK NOTES, DOCUMENTS OR OTHER ARTICLES TO BE MADE SECURE

摘要

The invention concerns a thread or transfer film comprising at least a flexible base layer (3) and an opaque layer (4), wherein the opaque layer (4) comprises identifying signs (6) such as letters, figures or like characters. The identifying signs (6) are obtained by an engraving technique using a laser beam.