| 摘要 |
A security element (20), such as a thread, strip and the like, for security documents in general, comprising a flexible backing layer (1) that has, on at least one face, a layer (2) of metallic material provided with regions (3) in which the thickness of the metal is less than 70% and more than 25% of the thickness of the layer (2) of metallic material of the nearby portion, further comprising, on the backing layer (1), a layer (10) of material that shifts color according to the type of light and angle of incidence of the light, the layer (10) of color-shifting material being in any case in register with the regions (3). |
