EP 1032498 A1 20000906 - HEAT-SENSITIVE RECORDING MATERIALS AND METHOD FOR AUTHENTICITY CHECKING
Title (en)
HEAT-SENSITIVE RECORDING MATERIALS AND METHOD FOR AUTHENTICITY CHECKING
Title (de)
WÄRMEEMPFINDLICHE AUFZEICHNUNGSMATERIALIEN UND VERFAHREN ZUR AUTHENTIZITÄTSPRÜFUNG
Title (fr)
MATERIAUX D'IMPRESSION THERMOSENSIBLES ET PROCEDE DE VERIFICATION D'AUTHENTICITE
Publication
Application
Priority
- DE 19842867 A 19980919
- DE 19842866 A 19980919
- EP 9906060 W 19990819
Abstract (en)
[origin: US6632773B1] A method of checking the authenticity of a heat-sensitive recording material having a carrier paper with a recording layer which is arranged on one face and which contains colorant formers and organic colorant acceptors that react with one another when heated; and a security feature provided as a water-soluble dye which fluoresces under UV radiation, the dye being applied without binder in a pattern, invisible under daylight, to a surface of a face of the carrier paper opposite the face provided with the recording layer, so that the entire surface has the pattern, the water-soluble dye being applied at a mass per unit area between 0.01 and 40 mg/m<HIL><2</SP><PDAT>, the method comprising the step of wetting the surface of the layer opposite the recording layer with an alkaline substance.</PTEXT>
IPC 1-7
B41M 5/30; B41M 3/14; B41M 3/00; B41M 7/00; B41M 5/40; D21H 21/46
IPC 8 full level
B41J 29/00 (2006.01); B41M 3/00 (2006.01); B41M 3/14 (2006.01); B41M 5/28 (2006.01); B41M 5/30 (2006.01); B41M 5/40 (2006.01); B41M 7/00 (2006.01); D21H 21/46 (2006.01); D21H 21/48 (2006.01); B41M 5/323 (2006.01)
CPC (source: EP US)
B41M 3/14 (2013.01 - EP US); B41M 3/144 (2013.01 - EP US); B41M 5/41 (2013.01 - EP US); B41M 5/42 (2013.01 - EP US); D21H 21/46 (2013.01 - EP US); D21H 21/48 (2013.01 - EP US); B41M 5/323 (2013.01 - EP US); B41M 5/423 (2013.01 - EP US); B41M 2205/36 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6632773 B1 20031014; AT E220997 T1 20020815; DE 59902110 D1 20020829; EP 1032498 A1 20000906; EP 1032498 B1 20020724; ES 2181470 T3 20030216; JP 2002526302 A 20020820; JP 4372353 B2 20091125; WO 0016986 A1 20000330
DOCDB simple family (application)
US 55478800 A 20000519; AT 99944434 T 19990819; DE 59902110 T 19990819; EP 9906060 W 19990819; EP 99944434 A 19990819; ES 99944434 T 19990819; JP 2000573922 A 19990819