VERIFICATION METHOD

摘要

The present invention relates to a verification method of tablets, in particular pharmaceutical tablets. It further relates to an invisible secure marking or information which is a part of such tablet. The invention further relates to tablets suitable for such verification method, to processes for manufacturing such tablets and methods for reading the information.

主权项

1. A verification method for a pharmaceutical tablet, comprising:
compressing a powder mixture in a die between two punch tools to produce a core of the tablet, the compressing including embossing one or more three-dimensional structures on the surface of the core; applying a coating over the surface of the core to produce the tablet in finalized form with the one or more three-dimensional structures at an interface between the core and the coating, the coating rendering each of the one or more three-dimensional structures invisible to the unaided eye by appropriate color, thickness, reflection or scattering properties thereof; and verifying authenticity of the tablet after production of the tablet by scanning the tablet with an optical interferometry microscope to detect the one or more three-dimensional structures.