"Outdoor Use of Droplet-Blocking Masks Also Effective... Mesh Masks Lack Performance"

Seoul Health and Environment Research Institute, 'KF-AD' Mask Comfortable to Breathe and Excellent Particle Filtration Performance

[Asia Economy Reporter Jo In-kyung] Test results have shown that splash-blocking masks (KF-AD) have particle blocking performance close to that of health masks (KF80) and are comfortable to breathe through. However, mesh masks were found to have a particle blocking rate much lower than that of health masks.

The Seoul Institute of Health and Environment announced on the 13th the results of 'dust collection efficiency tests' evaluating particle blocking performance and 'facial inhalation resistance tests' evaluating breathability conducted from the 7th to the 25th of last month on a total of 17 products: 10 splash-blocking masks classified as quasi-drugs and 7 mesh masks classified as industrial products available on the market.

The dust collection efficiency test measures the rate at which masks filter out small particles by generating aerosol particles averaging 0.6 ㎛ using sodium chloride. The facial inhalation resistance test evaluates the resistance inside the mask when a person inhales air.

Test results showed that the dust collection efficiency of the 10 splash-blocking mask products averaged 75%, with 5 products exceeding 80%. Also, the facial inhalation resistance of splash-blocking masks averaged 16 Pa (Pascal), which is significantly lower than that of KF80 grade health masks (standard: 60 Pa or less).

On the other hand, mesh masks had an average facial inhalation resistance of 3 Pa, making breathing very comfortable, but their dust collection efficiency averaged only 17%, making it difficult to expect effective particle blocking performance.

Shin Yong-seung, director of the Seoul Institute of Health and Environment, explained, "For healthy people engaging in outdoor or open-air activities for extended periods, using lightweight and breathable splash-blocking masks can be an effective method. However, when visiting 3-mil (closed, close contact, crowded) areas and hospitals, or if you are a patient, it is advisable to wear health masks rated KF80 or KF94 to prevent COVID-19."

This content was produced with the assistance of AI translation services.