Photocopying – Contact printing – Light boxes
Patent
1991-11-04
1993-05-04
Grimley, A. T.
Photocopying
Contact printing
Light boxes
283 73, 355133, 430137, G03G 2100
Patent
active
052086305
ABSTRACT:
A process for the authentication of documents which comprises generating developed documents in an electophotographic apparatus, or in a laser printer, with an encapsulated toner comprised of a core comprised of polymer, pigment, and an infrared absorbing component, and thereover a polymeric shell; and subjecting the document to an infrared reader whereby the near infrared absorbing component is detected spectroscopically.
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Duff James M.
Goodbrand H. Bruce
Wong Raymond W.
Brase Sandra L.
Grimley A. T.
Palazzo E. O.
Xerox Corporation
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