This makes it easy to tell that you have a complete seal.
The fact that your existing masks do not pass without tape indicates that you do not have a seal, and the filtration numbers you're seeing are reduced by many percentage points (eg; from 95% to 90% or lower) as air enters the mask unfiltered through the sides.
I have not performed the cigarette test myself, and haven't seen information indicating it is a reliable covid test, but you are certainly welcome to try it with a Narwall! I'd be keen for your results, and could provide a discount in exchange for the information.
This makes it easy to tell that you have a complete seal.
The fact that your existing masks do not pass without tape indicates that you do not have a seal, and the filtration numbers you're seeing are reduced by many percentage points (eg; from 95% to 90% or lower) as air enters the mask unfiltered through the sides.
I have not performed the cigarette test myself, and haven't seen information indicating it is a reliable covid test, but you are certainly welcome to try it with a Narwall! I'd be keen for your results, and could provide a discount in exchange for the information.