| 摘要 |
A substrate, such as a banknote or traveller's cheque, carries a security device comprising in association at least one embossed transitory image (1), such as a latent or transient image and an embossed linear area (4). The arrangement is such that when the embossed region of the substrate is viewed from different angles the or each image and the linear area can be visually discerned. |
