Patent ID: 9251550
Filing Date: 2016-02-02
CPC Classification: B41M,B42D,B44F,G06T

Claim Text:
1. A security document or device including at least one area formed from a transparent plastics material which is exposed on at least one side to form a window or half-window, and a first colour shifting ink composition including a first interference pigment and a first colour pigment and a second colour shifting ink composition including a second interference pigment and a second colour pigment, applied in at least part of the window or half-window, wherein the first colour shifting ink composition provides, at a first viewing angle, a first colour from the first interference pigment and the second colour shifting ink composition provides, at the first viewing angle, substantially the same first colour from the second interference pigment, wherein, at a second viewing angle, different from the first viewing angle, the first colour shifting ink composition provides a second colour from the first colour pigment and the second colour shifting ink composition provides a third colour from the second colour pigment, different from the first and second colour, wherein the first and second interference pigment are different than one another and the first and second organic colour pigments are different than one another.