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Process for the authentication of documents utilizing encapsulated toners

  • US 5,208,630 A
  • Filed: 11/04/1991
  • Issued: 05/04/1993
  • Est. Priority Date: 11/04/1991
  • Status: Expired due to Term
First Claim
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1. A process for the authentication of documents which comprises generating developed documents in an electrophotographic 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 said documents to an infrared reader whereby said infrared absorbing component is detected spectroscopically.

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