Importance

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Abstract

The invention relates to security means for securing the sequential order of the pages of a book such as a passport, or other such security document, by enabling the convenient detection of any removed pages through a visual inspection of the book. Specifically, the invention provides a means of marking the unbound edges of the pages of a book whereby any subsequently missing page(s) may be detected upon a visual review of the unbound side of the book. The tamper-proof comprises a plurality of pages, a spine at a first side of the pages and a visually detectable marking on each one of successive ones of the pages at the outer edge of the side which is opposite the first side. The markings collectively depict a visual image across the outer edges of the opposite sides of the pages such that the absence of any one of the successive pages is identifiable upon viewing the image. Preferably, the markings are printed by means of invisible fluorescent ink.

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First Claim