| 摘要 |
A fibrous sheet has an outer surface of fibrous elements embossed with a pattern of fine grooves that are substantially aligned from fibrous element to fibrous element, and which produces rainbow and/or hologram images on exposure to light. A thin layer of metal, deposited atop the embossed pattern of grooves, intensifies the rainbow and/or hologram images and significantly increases the resistance of the sheet to dry-cleaning-induced degradation of the images.
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