Invisible, x-ray opaque fluorescent printing medium for multiple

Details Invisible, x-ray opaque fluorescent printing medium for multiple Invisible, x-ray opaque fluorescent printing medium for multiple

1994-10-11

1996-06-04

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 21A, 106479, 25230128, C09D 1100

Patent

active

055229212

ABSTRACT:
Materials for printing information that are invisible under normal white or visible light but are x-ray opaque and ultraviolet fluorescent or absorbent are used for multiplex reading. The invention permits a reader to use x-ray radiation, ultraviolet light or visible light to read printed information. With the x-ray reading capability it is possible to read pages in sealed envelopes, thick documents or unopened attache cases.

REFERENCES:
patent: 2462018 (1949-02-01), Wood
patent: 4813062 (1989-03-01), Gilpatrick
patent: 4918715 (1990-04-01), Krupnick et al.

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