The new paper reports the results of experimental investigation of FFP and surgical masks. The filtration efficiency of filter media for respiratory masks and the total leakage of respiratory masks were measured.

Ripperger, S., Antonyuk, S.: Partikelfilternde Halbmasken - Stand der Technik und Untersuchungsergebnisse. F&S Filtrieren und Separieren 2 (2020) 70-73.