Test report No. 383266 dated 26 May 2021 Page 5 of 6 Light transmittance before and after the radiation test BLACK glass Light transmittance before the radiation test Light transmittance after the radiation test Deviation from the initial measurement as a percentage [%] [%] [%] Measuring point 1 13,8 13,9 0,72 Measuring point 2 13,8 13,9 0,72 Measuring point 3 13,8 13,9 0,72 Average 13,8 13,9 0,72 Light transmittance before and after the radiation test CYAN glass Light transmittance before the radiation test Light transmittance after the radiation test Deviation from the initial measurement as a percentage [%] [%] [%] Measuring point 1 49,8 50,4 1,20 Measuring point 2 49,8 50,4 1,20 Measuring point 3 49,8 50,4 1,20 Average 49,8 50,4 1,20 Colour difference The following table specifies L*a*b* values before and after exposure to UV radiation and the respective difference. WHITE SEETHROUGH SUBSTRATE Pre-radiation Post-radiation Difference L* 61,76 55,97 ∆L* -5,79 a* -1,41 -3,21 ∆a* -1,80 b* -2,13 1,07 ∆b* 3,20 ∆E* 6,86 BLACK SEETHROUGH SUBSTRATE Pre-radiation Post-radiation Difference L* 6,87 6,85 ∆L* -0,02 a* -0,49 -0,17 ∆a* 0,32 b* -4,25 -4,91 ∆b* -0,66 ∆E* 0,74 YELLOW SEETHROUGH SUBSTRATE Pre-radiation Post-radiation Difference L* 19,42 18,84 ∆L* -0,58 a* -9,42 -8,93 ∆a* 0,49 b* 6,82 7,39 ∆b* 0,57 ∆E* 0,95 MAGENTA SEETHROUGH SUBSTRATE Pre-radiation Post-radiation Difference L* 7,72 7,66 ∆L* -0,06 a* 11,26 11,57 ∆a* 0,31 b* -6,25 -5,64 ∆b* 0,61 ∆E* 0,69
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