| 摘要 |
A security article (10) is provided having a multicoloured image (14) and which comprises a first layer of transparent polymeric material (11) carryin g parts of an image (14) formed in a first colour (21); and at least one other layer of transparent polymeric material (12) carrying parts of the image (14 ) formed in a different colour (22). The layers are laminated together with th e parts of the image (14) formed in the first (21) and different colours (22) superposed over one another, whereby the colours (21, 22) combine to form a multicoloured image (14) in the laminated security article (10). In one embodiment, the multi coloured image is viewable from both sides of the security article, and in another form an opaque layer may be provided on one side of the transparent layers to provide a background for viewing the image in reflection from one side of the article. The parts of the image formed by different colours in the respective layers are preferably embedded in the layers, eg by a laser marking process, to form a tamper evident security article. |
