EP 0494828 B1 19950419 - Safety document.
Title (en)
Safety document.
Title (de)
Sicherheitspapier.
Title (fr)
Document de sécurité.
Publication
Application
Priority
FR 9100311 A 19910111
Abstract (en)
[origin: EP0494828A1] Security document which cannot be falsified with a chemical agent, especially with sodium sulphite, comprising at least one agent which is sensitive to bases, characterised in that it comprises at the surface and/or in bulk at least one compound generating alkalinity under the action of sodium sulphite. The alkalinity generator is preferably an aldehyde or a ketone. The invention is also intended to provide a composition intended to make a document incapable of being falsified with sodium sulphite, whose characteristic is that it contains: - at least one compound generating alkalinity< - at least one agent sensitive to strong bases and/or a coloured indicator - at least one binder usually employed in paper manufacture. e
IPC 1-7
IPC 8 full level
D21H 17/06 (2006.01); D21H 21/46 (2006.01)
CPC (source: EP)
D21H 17/06 (2013.01); D21H 21/46 (2013.01)
Designated contracting state (EPC)
FR
DOCDB simple family (publication)
EP 0494828 A1 19920715; EP 0494828 B1 19950419; FR 2671566 A1 19920717; FR 2671566 B1 19930409
DOCDB simple family (application)
EP 92400058 A 19920110; FR 9100311 A 19910111