Method for producing a finishing layer containing a window for a portable data storage medium and said finishing layer

A portable data storage medium comprising an active display element disposed in a core layer, and which display element is visible from a viewing side through a surface of the portable data storage medium, wherein a finishing layer is disposed over the core layer having the display element in a window of the core layer, the outer surface of said finishing layer facing away, and forming the surface of the portable data storage medium, and wherein the finishing layer comprises:

• a transparent support layer having a thickness between 50 and 100 μm covering the core layer,
• an opaque color layer applied to the transparent support layer, said opaque layer having a portion cut out above the display area of the active display element and having a height between 10 and 80% of the height of the support layer in a dry state,
• a primer layer applied to the opaque color layer, said primer layer having a height which is between 10% and 40% of the height of the support layer in the dry state,
• a design color layer over the primer layer,
• and a finish layer coated over the design color layer, said finish layer having a top surface forming a surface of the portable data storage medium.