| 摘要 |
A security device for inclusion in pulp from which a security paper is manufactured, and a method of making such a security device. The device is arranged so as to form a windowed security thread in a security paper and comprises flexible substrate (10) having two surfaces (12, 14); a bonding layer (17) on at least part of one or both surfaces and a reflective or diffractive layer (16) on at least part of one or both surfaces, between the substrate and the bonding layer; wherein at least one surface of the device has one or more first regions in which the bonding layer is present and one or more second regions in which the bonding layer is not present. |
