| 摘要 |
A security substrate comprises an elongate security device 10 or patch 15, which security device has a series of first regions exposed at a series of windows 11 formed in at least a first surface of the substrate and a series of second regions covered by the substrate at bridges 13 formed between the windows in the first surface of the substrate. Each of the first regions is provided with a first security feature which is of the same appearance in each region and is visible in each window when the first surface of the substrate is viewed in reflected light. The second regions are provided with a second security feature which is of the same appearance in each second region but is different from the first security feature and is not visible when the first surface of the substrate is viewed in reflected light, but is visible when the first surface of the substrate is viewed in transmitted light. |
