Work Item
ASTM WK76322

New Test Method for Measurement of Sub-micron Particulate Filtration Efficiency for Wearable Filter-Based Products against Solid Particulates

1. Scope

This test method establishes standardized procedures for measuring the proportion of sub-micron sized particles that pass through filter media, which are part of products that are worn by an individual on their face for purposes of either providing protection from inhalation of solid particles or source control or both. Applicable products include respirators, medical face masks, and barrier face coverings.


Sub-micron particulate, filtration efficiency, respirators, medical face masks, barrier face coverings


Currently, Specification F3502 references the use of sub-micron particulate filtration procedures that are established as part of 42 CFR Part 84, that in turn are addressed by NIOSH Procedure No. TEB-APR-STP-0059. Some modifications are required in order for this testing to be performed on the range of different barrier face covering products. These procedures and their modifications are provided in SPecification F3502 and it has been further proposed that Specification F2100 on maerials used in medical face masks employ the same test method. The development of a standard test method will permit having a uniform set of test procedures and the benefit of interlaboratory testing for improved test consistency.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: F23.65

Committee: F23

Staff Manager: Mary Mikolajewski

Work Item Status

Date Initiated: 03-19-2021

Technical Contact: Jeffrey Stull

Item: 000