3 Levels of Particle Filtering Tests for Face Masks or Filters
When you test filter materials at home, you may have different particles available to you to use or different equipment to detect the particles. Therefore one method may not suit all your needs. In this video I am going to show you 3 levels of particle filtering tests I have invented for your face masks or filters. These presentations are improved and updated a bit from the previous videos in which they were shown.