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Security sheet comprising a security mark tridescente, and document security
Security sheet comprising a security mark tridescente, and document security
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机译:包含安全标志三元组的安全表和文件安全性
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摘要
A security sheet including an iridescent security mark observable on the surface of the sheet, the mark having at least one zone presenting an iridescent effect, the zone being colored in normal observation with the naked eye and including iridescent pigments that are practically colorless in normal observation and that present an iridescent effect visible only in oblique observation.
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