Table 3.

Geometry of the samples and parameters of the punches used for embossing the samples.

Sample Name	Sample dimensions	Punch type	Punch depth [μm]
Reference	60 mm × 10 mm × 350 μm	none	none
A	60 mm × 10 mm × 350 μm	sphere with diameter Ds = 2 mm	≈238
B	60 mm × 10 mm × 350 μm	rounded tip with cone angle 110°, Dt = 3 mm	≈306
C	60 mm × 10 mm × 350 μm	cylindrical tip, Df = 3 mm	≈240

In Fig. 6 the shape of the punches used is shown. The embossing depth has been measured for each sample as explained in Sec. 4.5.