EP 0390638 B1 19940223 - Base-sheet for security document, with a transparent coating.
Title (en)
Base-sheet for security document, with a transparent coating.
Title (de)
Träger für Sicherheitsdokumente mit einer Beschichtung, die durchsichtig werden kann.
Title (fr)
Nouveau support avec couche pouvant être rendue transparente pour document de sécurité.
Publication
Application
Priority
FR 8903771 A 19890322
Abstract (en)
[origin: EP0390638A1] Base sheet with a layer which can be made transparent by a liquid such as water. This base is resistant to marking by local application of pressure and/or heat and comprises: - at least one flexible sheet - at least one layer deposited on the flexible sheet, said layer being microporous and opaque and containing at least some particles which are not heat-cured, at least one binder and optionally other additives. The layer may contain at least one hydrophobic binder and at least one hydrophilic binder and the particles which are not heat-cured have a mean particle size of between 0.1 and 100 micrometres. Application as a document which can be authenticated using water.
IPC 1-7
IPC 8 full level
B41M 5/00 (2006.01); D21H 21/44 (2006.01)
CPC (source: EP)
B41M 5/0029 (2013.01); D21H 21/44 (2013.01)
Designated contracting state (EPC)
BE CH DE ES GB IT LI NL
DOCDB simple family (publication)
EP 0390638 A1 19901003; EP 0390638 B1 19940223; DE 69006759 D1 19940331; DE 69006759 T2 19940707; FR 2644803 A1 19900928; FR 2644803 B1 19931029
DOCDB simple family (application)
EP 90400749 A 19900320; DE 69006759 T 19900320; FR 8903771 A 19890322