Security, information document
作者： William Harvey Mowry , Robert L. Neitman
DOI:
关键词:
摘要: A security, information document for providing to a reader from an source organization includes substrate having first area in which half-tone warning image is printed, indicating that copy of the unauthorized document. background printed second on substrate, with surrounding area. camouflage extends over confusing eye observer such not readily observed. One and screen line spacing it reproducible by copier. The may contain identification information.
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