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. 2021 Jun 5;26(11):3431. doi: 10.3390/molecules26113431

Figure 2.

Figure 2

Transmittance spectra of PP samples after accelerated laboratory weathering tests in an Atlas Weather-Ometer Ci4000 according to the standard ISO 4892-2 with an intensity of 0.75 W/m2 at 340 nm for 7 weeks corresponding to 3.15 MJ/m2·nm. This dose matches with the annual dose [54]. Note: “Week” 0 is the original sample (not introduced in the Weather-Ometer).