Security paper/paperboard and a method of producing security paper/paperboard
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United States of America Patent
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N/A
Issued Date -
Dec 11, 2003
app pub date -
Feb 20, 2003
filing date -
Jun 20, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention relates to security paper and security paperboard that comprises respectively base paper and base paperboard having one or several layers of pulp fibre, plus a surface treatment layer on at least one side of the base paper and base paperboard, wherein said layer is congruent with said base paper and base paperboard, and wherein at least one layer forms part of at least one local deviation in the form of a distinctive mark. The invention is characterised in that the local deviation includes locally compressed material plus a local surface treatment layer whose thickness exceeds the thickness of the corresponding surrounding and outwardly lying surface treatment layer. The present invention also relates to a method of manufacturing security paper and security paperboard.
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