Global Patent Index - EP 1032498 A1

EP 1032498 A1 2000-09-06 - 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

EP 1032498 A1 (DE)

Application

EP 99944434 A

Priority

  • DE 19842867 A
  • DE 19842866 A
  • EP 9906060 W

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 (main, further and additional classification)

B41M 5/30; B41M 3/00; B41M 3/14; B41M 5/40; B41M 7/00; D21H 21/46

IPC 8 full level (invention and additional information)

B41J 29/00 (2006.01); B41M 3/14 (2006.01); B41M 5/28 (2006.01); B41M 5/30 (2006.01); D21H 21/46 (2006.01); D21H 21/48 (2006.01); B41M 5/323 (2006.01)

CPC (invention and additional information)

D21H 21/48 (2013.01); B41M 3/14 (2013.01); B41M 3/144 (2013.01); B41M 5/41 (2013.01); B41M 5/42 (2013.01); D21H 21/46 (2013.01); B41M 5/323 (2013.01); B41M 5/423 (2013.01); B41M 2205/36 (2013.01)

Citation (search report)

See references of WO 0016986A1

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

US 6632773 B1 20031014; AT 220997 T 20020815; EP 1032498 A1 20000906; EP 1032498 B1 20020724; ES 2181470 T3 20030216; JP 2002526302 A 20020820; JP 4372353 B2 20091125; WO 0016986 A1 20000330