Figure 3
From: Effect of gamma irradiation on filtering facepiece respirators and SARS-CoV-2 detection
Representative microscopic images of KN95 and N95-3 M masks showing fabrics after 0, 0.5, 5 and 15 kGy low dose rate gamma irradiation (0.5088 kGy/hour). Arrows indicate physical changes (e.g. holes) within masks’ fabrics resulting from alteration in polymer homogeneity following irradiation. Photomicrographs are at 5 × magnification where scale bars show 1 mm.
