Patent ID: 7713616
Filing Date: 2010-05-11
Classification: B41M,B42D,D21H,Y10T

Abstract:
1. A flat dual security feature, comprising at least one flake-form effect pigment, and at least one pigment having an average particle size of 1-60 μm which luminesces in the ultraviolet spectral region, wherein the luminescent pigments are present in such a low concentration that they are evident to the naked eye as individual particles under the action of UV light, wherein the security feature is in the form of a coating on a document of value or article, which coating has been achieved by the application of a coating solution, wherein the flake-form effect pigment was present in the coating solution in a proportion of 5-40% by weight based on the coating solution, and wherein the luminescent pigment was present in the coating solution in a proportion of 0.01 to 3% by weight based on the coating solution.