| 摘要 |
A security document (10) including a security device, and a method of manufacturing such a document. The document (10) includes a first fluorescent layer (130) which fluoresces in a first visible colour when exposed to ultraviolet light; a UV blocking layer (120) which is opaque to ultraviolet light, but transmits visible light; and a second fluorescent layer (110) which fluoresces in a second, different, visible colour when exposed to ultraviolet light. The second fluorescent layer (110) is part of a security transfer (50) which is affixed to the face of the security document substrate (20). The security transfer (50) has an inner face proximal to the security substrate (20) and an outer face distal to the security substrate. The second fluorescent layer (110) is closer to the outer face of the security transfer than either of the first fluorescent layer (130) or the UV blocking layer (120). |
