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. 2021 Mar 4;120(14):2927–2942. doi: 10.1016/j.bpj.2021.02.039

Figure 2.

Figure 2

Densitometric UV-C radiometry and transmittance of shell material. (A) Color change of UV intensity label stamps upon exposure with increasing UV-C dosage. (B) Exponential fit of the density of the stamps quantified as the mean inverted red channel intensity of the flatbed scanner image. (C) UV intensity labels exposed through the shell material of the 3M 8210 N95 mask for 60- and 180-min exposures in the UVP CL-1000 cross-linker. The incident exposure was quantified by integration of the UV-C meter reading sampled in 1-s intervals. The transmitted exposure is quantified using the calibration curve from (B). To see this figure in color, go online.