Figure 1
From: In vitro testing of salt coating of fabrics as a potential antiviral agent in reusable face masks

Concentrations of salt (sodium chloride, NaCl) deposited on spray- and dip-coated fabrics. For the Spr treatments, a single piece of material (42.25 cm2) was prepared, and three pieces (1 cm2 replicates) were cut out of it. For the Dip treatments, three samples (7.5 cm2) were prepared separately. (a) Spray coating with stroke units 1, 3, 5, and 10. Regression line equation: Y = 2.0805x − 2.076; R2 = 0.9774; R = 0.9886; P < 0.05. (b) Dip coating with a salt solution diluted 10 × , 5 × , or no dilution. Data are means ± standard deviations. Regression line equation: Y = 45.256x + 0.3492; R2 = 0.9968; R = 0.9984; P < 0.0001. Weighed salt concentrations are displayed and expressed in milligrams per square centimeter.