Security paper for currency and banknotes

Details Security paper for currency and banknotes Security paper for currency and banknotes

1986-12-17

1988-08-02

Chin, Peter

Paper making and fiber liberation

Processes and products

Including solid non-waterlaid preform

162105, 162134, 162140, D21D 300, D21H 510

Patent

active

047612053

ABSTRACT:
Security devices in the form of metalized plastic films are incorporated within a security paper such as banknotes and other valuable documents during the papermaking process for viewing solely by means of transmitted light. The devices comprise printing of extreme fine line clarity and high opacity such that legibility is possible by means of transmitted light while remaining completely indiscernable under reflected light.

REFERENCES:
patent: 28370 (1860-05-01), Howell
patent: 3880706 (1975-04-01), Williams
patent: 4462867 (1984-07-01), Fuller
patent: 4552617 (1985-11-01), Crane

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