Figure 2
From: In vitro testing of salt coating of fabrics as a potential antiviral agent in reusable face masks
Scanning electron microscopic images of test material, salt-coated by spray and dip methods. The salt formulation was used non-diluted or diluted. Spray treatments allowed the deposition of increasing amounts of salt by varying the valve aperture of the spray device according to arbitrary stroke units. (a) Non-coated, (b) spray, undiluted salt formulation, stroke unit 1 (Spr S1), (c) spray, fivefold diluted salt formulation, stroke unit 3 (Spr S3 Dil5 ×), (d) spray, undiluted salt formulation, stroke unit 3 (Spr S3), (e) spray, undiluted salt formulation, stroke unit 5 (Spr S5), (f) spray, undiluted salt formulation, stroke unit 10 (Spr S10). For dip treatments test materials were immersed into (g) tenfold diluted (Dip Dil10 ×), (h) fivefold diluted (Dip Dil5 ×), and (i) undiluted (Dip No Dil) salt formulations. Arrows on images point at examples of salt crystals and aggregates found on the test materials.
