The paragraph presents the results of the optical characterization on single layers as well as on assembled components. The broad
band values (light and solar transmittance and reflectance), evaluated starting from spectral data, were calculated according to the
procedure defined in the relevant EU technical standard [25].
4.1.1. Commercial spectrophotometer measurements
The measurements for the assembled samples in the reflectance
and transmittance modes are not presented because the commercial spectrophotometer set up does not allow sufficient accuracy.