EP 1338430 A1 20030827 - Method of preparing a security document
Title (en)
Method of preparing a security document
Title (de)
Verfahren zur Herstellung eines Sicherheitsdokumentes
Title (fr)
Procédé de fabrication d'un document de sécurité
Publication
Application
Priority
GB 0203916 A 20020219
Abstract (en)
A method of preparing a security document which comprises printing on at least one side of a security paper and thereafter applying to at least one side of the printed security paper over the printing a substantially transparent coating composition comprising an unpigmented polyurethane and/or polyacrylate, said coating composition being such as to provide a film, when cast on a glass surface, that has a K¦nig hardness of from 15 to 130 seconds, and also passes the water resistance test as defined by the following steps: (a) the total formulation to be used in the coating is cast on a glass plate so as to produce a film with a dry weight of 80 g/m<2>; (b) the film is initially dried at 23 DEG C and once tack free dried for an additional hour at 80 DEG C; (c) the film is weighed before being wetted and tested for tensile strength and Young's Modulus and is visually checked for any change in transparency; (d) a sample of the film is boiled in water containing 10 g/litre Na2CO3 for 30 minutes; (e) the film is then rinsed in cold water and the steps (b) to (c) are then repeated; wherein when the film is dried and re-weighed the film meets the following criteria: (i) the wet tensile strength and Young's Modulus of the boiled film are not less that 90% of the initial film wet tensile strength and Young's Modulus; (ii) the film shows no perceptible loss of transparency; and (iii) the dried weight of the film is not less than 98% of the original weight.
IPC 1-7
IPC 8 full level
B41M 3/14 (2006.01); B41M 7/00 (2006.01); B41M 5/00 (2006.01); B41M 5/52 (2006.01)
CPC (source: EP)
B41M 3/14 (2013.01); B41M 7/0027 (2013.01); B41M 5/52 (2013.01); B41M 5/5254 (2013.01); B41M 5/5281 (2013.01)
Citation (search report)
- [YD] WO 9628610 A1 19960919 - PORTALS LTD [GB], et al
- [Y] DATABASE WPI Section Ch Week 199816, Derwent World Patents Index; Class A25, AN 1998-173829, XP002237390
- [Y] DATABASE WPI Section Ch Week 199816, Derwent World Patents Index; Class A25, AN 1998-173640, XP002237391
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
EP 1338430 A1 20030827; CA 2419190 A1 20030819; GB 0203916 D0 20020403; GB 2385298 A 20030820; GB 2385298 B 20040428
DOCDB simple family (application)
EP 03250978 A 20030218; CA 2419190 A 20030218; GB 0203916 A 20020219