Test report No. 383266 dated 26 May 2021 Page 3 of 6 Normative references Standard Title UNI EN ISO 12543-4:2011 Glass in building - Laminated glass and laminated safety glass - Part 4: Test methods for durability UNI EN 410:2011 Glass in building - Determination of luminous and solar characteristics of glazing UNI EN ISO/CIE 11664-4:2019 Colorimetry - Part 4: CIE 1976 L*a*b* colour space Apparatus Description In-house identification code Light radiation apparatus fitted with Osram Ultra-Vitalux 300 W lamps such as to guarantee a total irradiance level of (900 ± 100) W/m² // Istituto Giordano temperature and humidity chamber capable of ensuring that the temperature of the specimen is maintained at (+45 ± 5) °C FT152 Perkin-Elmer Lambda 750S spectrophotometer fitted with RSA ASSY 100 mm integrating sphere to measure in the ultraviolet/visible/near-infrared regions OT042 3nh NS800 portable spectrophotometer OT044 Method Radiation The item was placed inside the climate chamber and mounted vertically in front of the radiation array, the test being performed in accordance with clause 7 of standard UNI EN ISO 12543-4. At the end of the test, the item was inspected at a distance between 30 cm and 50 cm in front of a white diffuse background in order to check for possible faults occurring in the interlayer (bubbles, delamination, cloudiness), as requested by clause 7.5.1 of standard UNI EN ISO 12543-4. Determination of light transmittance The spectrophotometer was used to determine normal/hemispherical spectral transmittance in the visible range (380-780 nm). Light transmittance “τv” for standard illuminant D65 was measured before and after the radiation test in accordance with the procedure described in standard UNI EN 410 and using the spectral distribution set out under table 1 therein. In accordance with standard UNI EN ISO 12543-4 the deviation from the initial measurement as a percentage was determined (≡ 100·(τi-τf)/τi). Colour measurement0} Colour measurement before and after radiation testing was performed using the portable spectrophotometer complete with illuminant D65. The test was carried out using 10° observer and in accordance with CIE 1976 L*a*b* colour space as specified in standard UNI EN ISO/CIE 11664-4.
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