Method for protecting against forgery sheet-like printed documen

Details Method for protecting against forgery sheet-like printed documen Method for protecting against forgery sheet-like printed documen

1995-07-17

1998-08-04

Padgett, Marianne

Coating processes

Fraud or tamper detecting

427157, 427161, 427197, 427198, 427201, 427203, B41M 314, B44F 112, B05D 500

Patent

active

057890196

ABSTRACT:
A method for protecting against forgery a printed document comprises the step of applying on the document, during the printing thereof, a microcapsule layer. This layer comprises microcapsules including a chemical product adapted to release an indelible mark which reveals tampering on surfaces portions of a document subjected to a pressing or rubbing tampering force.

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