| 摘要 |
A security device comprising one or more printed or transferred first areas (5), each first area having one or more first colours; and one or more printed or transferred second areas (4), each second area having one or more second colours. At least one of the first and second areas (5, 4) comprises a discontinuous pattern, and the first area or areas (5) surrounds the second area or areas (4), each first area being distinguishable from the second area or areas. The first area(s) and/or second area(s) define an image (6). A camouflage pattern (40) is provided over the image (6) and at least an adjacent region surrounding the image, the camouflage pattern having a colour and pattern such that in combination with the first and second areas, it renders the image substantially invisible when viewed under reflected light but visible when viewed in transmission. |
