METHOD FOR IDENTIFYING AND PROTECTING EXCISE LABELS, BANK NOTES, SECURITIES, DOCUMENTS, AND ARTICLES; CRYPTIC IMAGE MEDIUM AS IDENTIFYING AND PROTECTIVE MARK Russian patent published in 1999 - IPC

Abstract RU 2137612 C1

FIELD: protection of various documents and articles against forgery. SUBSTANCE: method involves production and development of cryptic image that functions as identifying and protective mark. Identification medium has protective coating of anti-Stokes luminescent compound or includes anti-Stokes luminescent coating in the form of crystalline structure whose lattice incorporates atoms of several rare-earth metals at a time. EFFECT: improved reliability of forgery protection; improved image chemical stability; facilitated procedure. 9 cl

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RU 2 137 612 C1

Authors

Petrik V.I.

Dates

1999-09-20—Published

1998-09-18—Filed