Substrate with visible information protected against unauthorized copying, e.g. security or credential, uses yellow, magenta or cyan emitting colorant and remitting (in)organic pigment of same color in adjacent fields

摘要

Substrate with visible information protected against unauthorized copying uses emitting colorant(s) and remitting colorant(s), both of which have (almost) the same nuance with imperceptible fluorescence when viewed and in adjacent fields. The color position of both colorants corresponds to one of the trichrome colors yellow, magenta or cyan and the remitting colorant is an (in)organic pigment. Independent claims are also included for (a) the production of this substrate; and (b) a substrate of this type, in which both colorants are yellow and a remitting magenta or cyan colorant is added.