The Bulletin of Tokyo Medical and Dental University
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Bull. Tokyo Med. Dent. Univ. · Mar 1978
Comparative StudyA study on the microbial filtration efficiency of surgical face masks--with special reference to the non-woven fabric mask.
With the experimental apparatus designed and made available by Nicholes, we evaluated the bacterial filtration efficienty (B. F. E.) of the non-woven fabric and cotton cloth masks. ⋯ The B. F. E. of the conventional cotton cloth masks is not only lower but variable over a wide range of 43.1-93.6%.