Security paper
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United States of America Patent
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May 9, 2006
Issued Date -
N/A
app pub date -
Dec 21, 2001
filing date -
Dec 22, 2000
priority date (Note) -
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Abstract
The invention relates to security paper (1) including at least one zone (2; 3) that reacts with nonpolar solvents. The paper also includes a barrier (4) that is impermeable to nonpolar solvents between a first outside face (10) of the security paper and the zone (2; 3) that reacts with the solvents.
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