PAPERS AND CARDBOARD PRODUCTS SUITABLE FOR LASER MARKING, METHOD FOR PRODUCING SAME AND THEIR USE FOR PACKAGING MATERIALS, BANK NOTES AND SECURITIES, SECURITY PAPER AND GRAPHIC PRODUCTS
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United States of America Patent
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Issued Date -
Sep 5, 2002
app pub date -
Aug 6, 1999
filing date -
Feb 6, 1997
priority date (Note) -
Abandoned
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Abstract
The present invention relates to papers and cardboard products suitable for laser marking which are characterized in that as absorbing agents they contain inorganic, platelet-shaped substrates with a particle size of between 1 and 60 &mgr;m. The invention further relates to a method for producing papers and cardboard products suitable for laser marking, as well as their use for packaging materials, bank notes and securities. security paper and graphic products.
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