LUMINESCENT AND COLORED INK, METHOD FOR PRODUCING SUCH AN INK AND METHOD FOR MARKING A SUBSTRATE BY

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The invention relates to a coloured and luminescent ink, to a method for producing such an ink, and to a method for marking a substrate with such an ink. Said coloured and luminescent ink comprises : at least one solvent, a pigment in the form of particles for colouring the ink, and at least one luminescent element for providing the ink with luminescence properties. The invention is characterised in that the luminescent element(s) are exclusively organolanthanide complexes, in that the pigment is selected from carbon black or active carbon, and in that the organolanthanide complexes are homogeneously distributed on the surface of the pigment particles.