EP 0530059 B1 19950920 - System for the reversibel authentification of a security paper.
Title (en)
System for the reversibel authentification of a security paper.
Title (de)
System zum reversiblen Überprüfen eines Sicherheitspapiers auf Echtheit.
Title (fr)
Système d'authentification réversible d'un papier de sécurité.
Publication
Application
Priority
FR 9109549 A 19910729
Abstract (en)
[origin: EP0530059A1] The invention relates to a system for authenticating a security paper. It comprises, in combination: - a security paper comprising a first chemical reactant (1) which does not significantly impair the colour of the paper, - an authenticating composition comprising a second chemical reactant (2) forming a coloured product with (1), - a composition for deleting the coloured product. It preferably comprises: - a security paper comprising a complexant for transition metal ions as reactant (1), - an authenticating composition comprising transition metal ions forming a coloured complex with (1), as reactant (2), - a composition for deleting the coloured complex. Application as paper for banknotes.
IPC 1-7
IPC 8 full level
B41M 3/14 (2006.01); D21H 21/46 (2006.01)
CPC (source: EP)
B41M 3/142 (2013.01); D21H 21/46 (2013.01)
Designated contracting state (EPC)
AT BE DE ES GB IT NL SE
DOCDB simple family (publication)
EP 0530059 A1 19930303; EP 0530059 B1 19950920; AT E128201 T1 19951015; DE 69204946 D1 19951026; DE 69204946 T2 19960321; ES 2080465 T3 19960201; FR 2679934 A1 19930205; FR 2679934 B1 19931112
DOCDB simple family (application)
EP 92401979 A 19920709; AT 92401979 T 19920709; DE 69204946 T 19920709; ES 92401979 T 19920709; FR 9109549 A 19910729