<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The application of phosphorescence for the modification of face mask materials is motivated by the need to appreciably increase their visibility while using graphical elements with a relatively small area. Phosphorescent dyes absorb part of the visible spectrum while emitting radiation at wavelengths that are longer than the absorbed ones. Thus, a phosphorescent substance can emit light even if it is not being illuminated at a given time (but was before). This paper describes studies of the optical properties based on parameters such as the reflectance coefficient, chromaticity coordinates, as well as luminance measured from digital images for two models of smog-protective face half-masks differing in terms of their inner layer with filtration properties and outer printed layer. The external surface of one mask type is printed with a phosphorescent solid star pattern, while the other with a phosphorescent open star pattern. The influence of the inner filter layer was assessed in correlation with the colour of the outer layer and the type of printing. Moreover, the phenomenon of phosphorescence was identified. The study resulted in developing a material with properties providing better visibility under defined use conditions.</p>
</abstract>

The application of phosphorescence for the modification of face mask materials is motivated by the need to appreciably increase their visibility while using graphical elements with a relatively small area. Phosphorescent dyes absorb part of the visible spectrum while emitting radiation at wavelengths that are longer than the absorbed ones. Thus, a phosphorescent substance can emit light even if it is not being illuminated at a given time (but was before). This paper describes studies of the optical properties based on parameters such as the reflectance coefficient, chromaticity coordinates, as well as luminance measured from digital images for two models of smog-protective face half-masks differing in terms of their inner layer with filtration properties and outer printed layer. The external surface of one mask type is printed with a phosphorescent solid star pattern, while the other with a phosphorescent open star pattern. The influence of the inner filter layer was assessed in correlation with the colour of the outer layer and the type of printing. Moreover, the phenomenon of phosphorescence was identified. The study resulted in developing a material with properties providing better visibility under defined use conditions.

Coefficients for Assessing the Visibility of Materials Used in Anti-Smog Face Masks

Department of Personal Protective Equipment

Fibres & Textiles in Eastern Europe

This work is licensed under the Creative Commons Attribution 3.0 Public License.

The application of phosphorescence for the modification of face mask materials is motivated by the need to appreciably increase their visibility while using...

Coefficients for Assessing the Visibility of Materials Used in Anti-Smog Face Masks

Article Category: Research Article

Published Online: Oct 12, 2022

Page range: 46 - 56

DOI: https://doi.org/10.2478/ftee-2022-0022

Keywords
spunbond nonwoven, phosphorescent material, face half-mask, coefficient of reflectance, chromaticity coordinates, luminance

© 2022 Agnieszka Brochocka et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 3.0 Public License.

Coefficients for Assessing the Visibility of Materials Used in Anti-Smog Face Masks

Article Category: Research Article

Published Online: Oct 12, 2022

Page range: 46 - 56

DOI: https://doi.org/10.2478/ftee-2022-0022

Keywordsspunbond nonwoven, phosphorescent material, face half-mask, coefficient of reflectance, chromaticity coordinates, luminance

© 2022 Agnieszka Brochocka et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 3.0 Public License.

Keywords
spunbond nonwoven, phosphorescent material, face half-mask, coefficient of reflectance, chromaticity coordinates, luminance