Why are some smells filtered by breathing through fabric when others aren’t?
In: Biology
Smells are essentially microscopic particles of the thing that you are smelling. Fabric is pourus. Meaning air and germs and smells can flow through. Some particles are small enough to get through fabrics while others aren’t.
Mostly particle size of the thing that makes the smell.
Like something like chemical smells you usually need an VOC rated respirator which can grab onto the tiny chemical molecules.
For other things the smell is carried on larger particles. Like say wildfire smoke is mostly (not entirely but it works a bit) filterable with cloth because the ash bits are huge compared to say acetone vapor molecules.
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