EP 0243285 B1 19890816 - SECURITY PAPER MADE TAMPER-PROOF AND/OR AUTHENTICATABLE BY WAY OF THERMOCHROMISM, AND PROCESS FOR ITS PREPARATION
Title (en)
SECURITY PAPER MADE TAMPER-PROOF AND/OR AUTHENTICATABLE BY WAY OF THERMOCHROMISM, AND PROCESS FOR ITS PREPARATION
Publication
Application
Priority
FR 8606144 A 19860424
Abstract (en)
[origin: EP0243285A1] 1. Security paper, tamperproof because of an irreversible colour reaction and/or authenticatable because of a reversible colour, containing a water-soluble combination of crystal violet lactone (I) of formula see diagramm : EP0243285,P12,F1 and of an aliphatic organic acid containing a short hydrocarbon chain.
IPC 1-7
IPC 8 full level
B42D 15/00 (2006.01); B44F 1/12 (2006.01); D21H 21/46 (2006.01); D21H 21/48 (2006.01)
CPC (source: EP)
B42D 25/29 (2014.10); D21H 21/46 (2013.01); D21H 21/48 (2013.01)
Designated contracting state (EPC)
DE ES GB IT NL
DOCDB simple family (publication)
EP 0243285 A1 19871028; EP 0243285 B1 19890816; DE 3760455 D1 19890921; ES 2012811 B3 19900416; FR 2597895 A1 19871030; FR 2597895 B1 19890728; PT 84736 A 19870501; PT 84736 B 19891229
DOCDB simple family (application)
EP 87420103 A 19870421; DE 3760455 T 19870421; ES 87420103 T 19870421; FR 8606144 A 19860424; PT 8473687 A 19870422