Visible and multi-colored fluorescent safety threads are threads that have several colors in daylight, and which have several fluorescence colors under Ultra-Violet.
These wires are used in high security booklets and offer a fourth, very sophisticated level of protection.
Examples of these wires are wires that are simultaneously visible blue, green and red in daylight, and also fluoresce in blue and green and red under ultraviolet light.
Created in 1985, PETREL is the French leader in the supply of security products for securing documents. Located in France, near Paris, PETREL manufactures and develops 3 main product lines: Security inks, security fibers and security sewing threads.
Petrel Security
21 rue des Cerisiers
91090 Lisses, FRANCE