Security paper

Details Security paper Security paper

B - Operations, Transporting

42

D

8/4

B42D 15/00 (2006.01) B41M 3/14 (2006.01) B44F 1/12 (2006.01) C09K 11/06 (2006.01) D21H 21/46 (2006.01)

Patent

CA 1107005

Security Paper Abstract of the Disclosure Security paper which immediately reveals an attempt to alter handwriting thereon by the use of an alkaline ink remover and which is characterised by the incorporation therein of a pyrenesulphonic acid or a metal salt thereof, particularly an alkali metal or alkaline earth metal salt. Security paper incorporating such an acid or salt exhibits a fluorescent colouration when contacted with an alkaline ink remover. - 1 -

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