EP 1813436 A3 20080312 - Heat sensitive recording material comprising a feature for authentification
Title (en)
Heat sensitive recording material comprising a feature for authentification
Title (de)
Wärmeempfindliches Aufzeichnungsmaterial mit Authentifikationmsmerkmal
Title (fr)
Matériau thermosensible pour l'enregistrement comprenant un dispositif d'authentification
Publication
Application
Priority
- DE 102006003805 A 20060125
- DE 102006032523 A 20060712
Abstract (en)
[origin: EP1813436A2] A thermographic material (A), comprising a substrate supporting an active coating layer containing color former(s) (I) and developer(s) (II) reacting in presence of heat to form a colored printed image, contains at least two different (I) reacting with (II) to form different, first and second colors. The obtained image has a color formed from the first and second colors, with a color location of specific Lab values as authentication characteristic. A thermographic material (A), comprising a substrate supporting an active coating layer containing color former(s) (I) and developer(s) (II) reacting in presence of heat to form a colored printed image, contains at least two different (I) reacting with (II) to form different, first and second colors. The obtained image has a color formed from the first and second colors, with a color location having the following specific Lab values L*, a*, b* (determined with Elrepho 3000 (RTM: not defined) apparatus using light of type D 65/10) as authentication characteristic: L* = 24-35%; a* = -1 to +30; and b* = -2 to -60.
IPC 8 full level
CPC (source: EP)
B41M 5/30 (2013.01); B41M 5/3275 (2013.01); B41M 5/3333 (2013.01); B41M 5/3335 (2013.01); B41M 5/3336 (2013.01)
Citation (search report)
- [X] EP 0968837 A1 20000105 - JUJO PAPER CO LTD [JP]
- [A] EP 0249885 A2 19871223 - KANZAKI PAPER MFG CO LTD [JP]
- [A] US 4997741 A 19910305 - WATANABE TOSHIYUKI [JP]
- [A] DATABASE WPI Week 198449, Derwent World Patents Index; AN 1984-304468, XP002467119
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1813436 A2 20070801; EP 1813436 A3 20080312; DE 102006032523 A1 20070726
DOCDB simple family (application)
EP 07000997 A 20070118; DE 102006032523 A 20060712