Abstract: Disclosed herein in a preferred embodiment is a recording material comprising a substrate and a coating comprising at least 3 plies, wherein the outermost ply contains nanoparticles and the inner plies together contain at least one color former, at least one color developer, at least one absorber and at least one solubilizer, and no ply contains both a color former and a color developer. Also disclosed is a process for producing the recording material of the invention and also to a laser marking process wherein the recording material is irradiated with a laser.

Abstract: The present invention relates to a method for applying interference pigments to a substrate, comprising the steps: a) provision of a substrate and b) application of a preparation to at least one side of the substrate, where the preparation contains at least one surfactant and at least one interference pigment, the interference pigment having a carrier material and at least one coat applied to the carrier material, and a substrate obtainable by the abovementioned method.

Abstract: The present invention relates to a process for the production of nonuniformly intensely colored paper with improved printing or lettering features, and paper produced by this process.

Abstract: The present invention relates to a paper which contains a paper substrate and a preparation applied to at least one side of the paper substrate over the entire surface. The preparation contains at least one surfactant and at least one pigment having a particle diameter of from 1 to 500 nm, and a binder in a ratio to the pigment of not more than 5 parts by weight of binder: 100 parts by weight of pigment (based in each case on the solids content). In present invention is also related to the process of production of the paper.

Abstract: The present invention relates to a process for the production of nonuniformly intensely colored paper with improved printing or lettering features, and paper produced by this process.

Abstract: The present invention relates to a process for the production of nonuniformly intensely colored paper, and paper produced by this process. The process comprises: (a) application of at least one surfactant or a mixture of surfactants in the forms of a latent image or pattern to paper, (b) coloring of the paper by means of a dye solution and (c) drying of the colored paper.