Mitsubishi Hitec Paper Flensburg Gmbh

Mitsubishi Hitec Paper Europe Gmbh

Michael Reimann

Gerhard Stork

Wolfgang Wagner

Karsten Lerius

Erich Kranz

Karsten S&uuml;ssenbach

Kai Borenius

A method of checking the authenticity of a heat-sensitive recording material having a carrier paper with a recording layer which is arranged on one face and which contains colorant formers and organic colorant acceptors that react with one another when heated; and a security feature provided as a water-soluble dye which fluoresces under UV radiation, the dye being applied without binder in a pattern, invisible under daylight, to a surface of a face of the carrier paper opposite the face provided with the recording layer, so that the entire surface has the pattern, the water-soluble dye being applied at a mass per unit area between 0.01 and 40 mg/m , the method comprising the step of wetting the surface of the layer opposite the recording layer with an alkaline substance.

Heat-sensitive recording materials and method for authenticity checking

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Flensburg, Germany

Michael Reimann