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CHEMICALLY REACTIVE SECURITY INK, A METHOD OF USE OF SUCH INK, AND SECURITY DOCUMENTS INCORPORATING SUCH INK
CHEMICALLY REACTIVE SECURITY INK, A METHOD OF USE OF SUCH INK, AND SECURITY DOCUMENTS INCORPORATING SUCH INK
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机译:化学反应安全墨水,此类墨水的使用方法以及包含此类墨水的安全文件
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摘要
A document uses a chemically reactive security ink to facilitate security, making it more difficult to alter a genuine security document. The chemically reactive security ink masks a warning word or message on a security document. The hidden warning word or message is revealed when the document is subjected to chemical washing.
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